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Trend of the day · Health & longevityHealth & longevity · Oct 13, 2026

The Pope has early lung cancer, found and removed in surgery

The Pope has early lung cancer, found and removed in surgery

Found at a checkup before symptoms, lung cancer is often cured — the lesson is getting checked while you feel fine.

Guess before the AIs

Yes or no? You first — then we show what 10 AIs answered.

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They agree
8 of 10: heavy smokers aged 50 to 80 should ask for a yearly lung scan.
They split
Claude says he still flies to South America in November; MiMo says trips go.
Not obvious
Survival figures from 65% to 98% don't clash: they count different patients.
What to do
Test your home for radon, a lung-harming gas, even if you never smoked.
What to watch
If the Vatican confirms the November 6 trip by late October, recovery is on track.
Only one AI
Only Claude: a pill after surgery lifts some patients' survival from 78% to 88%.
Read in full

The ten AIs agree that this is lung cancer at its best case. A small growth found by chance at a routine checkup, before any symptoms, can often be cured by keyhole surgery alone. The usual course is a few days to a week in hospital, then several weeks of walking and breathing exercises before strength returns.

Eight of the ten point to the same practical step: a yearly low-dose CT scan, a quick low-radiation lung X-ray scan, for people aged 50 to 80 who smoked about a pack a day for 20 years and still smoke or quit within 15 years.

They split on numbers and on the trip. Claude, ChatGPT and Z.ai give about 65% of people alive after five years. That figure covers all lung cancer that has not spread. Grok and DeepSeek give 80 to 98%, which covers only the smallest tumors removed by surgery.

Both can be true, because they count different patients. On the November 6–17 trip to Uruguay, Argentina and Peru, Claude expects the pope to go on a lighter schedule and MiMo expects long trips to be dropped. Kimi notes that the usual three-week ban on flying after this surgery ends only days before he leaves.

ChatGPT and MiMo stress what comes next: the lab will check the removed tissue and nearby glands to set the true stage, and that decides whether scans alone are enough. Claude adds that a gene test on the tumor can point to a daily pill that improves survival for some patients. Gemini and Qwen tell all older adults to get scans. The other answers limit scans to people at real risk, which is what the guidelines say.

What a person can do: ask a doctor whether you or a parent qualifies for the yearly lung scan. If you never smoked, test your home for radon, the top cause of lung cancer in people who never smoked. Get a cough that will not go away checked. If a scan shows a spot, remember that fewer than 5% of spots are cancer, but keep every follow-up visit. After surgery, arrange help at home for the first two weeks.

They split: Claude says he still flies to South America in November; MiMo says trips go.
What settles the dispute: Whether he flies to South America on November 6 will show who is right.

Little split: both give the same advice; the sharpest doubts about the trip came from China.Only the AIs from one country noticed: AIs from the USA: radon gas at home is a top cause of lung cancer in people who never smoked.

What is confirmed and what is not

  • Confirmed by a source  About 2 in 3 people whose lung cancer has not spread live five years
  • Confirmed by a source  Yearly low-dose lung scans are advised for heavy smokers aged 50 to 80
  • Not known yet His November 6–17 South America trip will go ahead on a lighter plan

The AIs read 62 sources

Ask any AI yourself

I'm 67, smoked for 25 years and quit 10 years ago. Do I qualify for a yearly lung scan, and how do I ask my doctor?

Copy it and paste it into a chat with any AI

Ask several AIs at once — in our app

Who wins, who loses: People who get checked early gain the most; those who skip checkups lose time.

The final answer, by Claude Opus

All 10 answers ↓▶ Watch how it came together
Found at a checkup before symptoms, lung cancer is often cured — the lesson is getting checked while you feel fine.

On October 13, 2026, the Vatican said Pope Leo XIV, 71, has early lung cancer. Doctors first saw a small growth at a routine checkup.

At a hospital in Rome, surgeons removed the lower part of his right lung in a 90-minute operation with small cuts and a camera, and the Vatican says it went well (source).

What does a case like this tell ordinary people about lung cancer found early? What is likely to happen next for his health and his work, and what should a person in their sixties or seventies, or their family, take from it?

What the world's 10 leading AIs think

  1. 1ClaudeUSA8.5Lung cancer found before it spreads: two in three survive five years

    Lung cancer caught before it spreads is often beaten: for the main type, which includes the pope's, about two in three people are alive five years later, against about one in eight once it has spread (cancer.org, healthline.com, easternherald.com).

    It is not just a smokers' illness: up to one in five lung cancer deaths in the US are in people who never smoked, radon gas at home is their top cause, and the pope does not smoke (cancer.org, cnn.com).

    Cancer doctors expect an excellent outcome for him; he should spend about a week in hospital while tests show if he needs chemotherapy or other treatment, which most stage 1 patients do not (pbs.org, aljazeera.com, med.uth.edu).

    The big money question is his November 6–17 trip to Uruguay, Argentina and Peru, where Peru's hotel and restaurant group expects $80–100 million in tourism and up to 300,000 foreign visitors (aljazeera.com, andina.pe, radioondaazul.com).

    He still plans to go and reportedly timed the surgery to keep the trip, so I expect him to travel, likely on a lighter schedule; hotels, airlines and organizers should plan for changes, not a cancellation (aljazeera.com, easternherald.com, adnkronos.com).

    For drugmakers, the lesson is that tests on the removed tumor now steer care: when it has one gene change (called EGFR), a pill taken after surgery raised five-year survival from 78% to 88% in an AstraZeneca-funded trial (ascopost.com, ace.asco.org, dzl.de).

    If you are 50 to 80, smoked the equivalent of a pack a day for 20 years, and still smoke or quit within 15 years, ask your doctor about a yearly low-dose CT scan; if you never smoked, test your home for radon (uspreventiveservicestaskforce.org, cancer.org).

    If a scan shows a spot, stay calm, since fewer than 5% turn out to be cancer, but keep every follow-up scan (thoracic.org).

    If it is cancer, ask whether keyhole surgery and gene tests on the tumor fit your case, and families should plan on four to six weeks of daily walks and breathing exercises before strength comes back (med.uth.edu, onclive.com).

    Model: Claude Opus 5.5 · mode: Max · search on · new chat exact

    Lung cancer found before it spreads: two in three survive five years
    Sources
    1. npr.org
    2. vaticannews.va
    3. aljazeera.com
    4. pbs.org
    5. cnn.com
    6. easternherald.com
    7. cancer.org
    8. healthline.com
    9. cancer.org
    10. med.uth.edu
    11. andina.pe
    12. radioondaazul.com

    own forecast: The Vatican (vaticannews.va or the Holy See Press Office) will say that Pope Leo XIV needs no chemotherapy, radiation or other cancer drugs after his lung surgery, only regular check-ups. — 55% by Oct 31, 2026

  2. 2ChatGPTUSA8.3Early lung cancer can be treated, but surgery isn't the finish line

    Finding lung cancer early can make a major difference: U.S. data show about 66% five-year relative survival when cancer remains localized, compared with about 11% after it spreads to distant organs (seer.cancer.gov).

    Surgery can cure some early cases, but a successful operation does not automatically mean the cancer is gone; doctors must examine the removed tissue, surgical edges and nearby lymph nodes to establish its true stage (cancer.gov). If the tumor was completely removed without signs of spread, regular monitoring may be enough; otherwise, additional treatment could be recommended (cancer.gov).

    For his health and work, the most likely course is roughly a week in hospital followed by several weeks of rebuilding strength and breathing capacity (vaticannews.va; lung.org).

    Vatican officials can continue daily operations while he rests, but public audiences have been canceled through October 20, and the demanding November 6–17 South American trip remains vulnerable to changes if recovery takes longer than expected (apnews.com; apnews.com; vaticannews.va).

    For any organization, the lesson is to delegate important responsibilities and keep travel plans flexible rather than expect an immediate return after major surgery.

    For people in their sixties or seventies, the practical first step is checking screening eligibility: the American Cancer Society recommends yearly low-dose lung scans for adults aged 50–80 who currently smoke or previously smoked and have at least 20 pack-years of smoking history (cancer.org).

    Lung cancer can also affect people who never smoked, so persistent coughing, coughing up blood or unexplained breathing problems deserve medical attention; avoiding tobacco smoke and testing homes for radon also matter (cdc.gov).

    Families facing a diagnosis should ask about the cancer's exact stage, whether additional treatment is necessary and the schedule for future scans, because monitoring remains important even after successful surgery (cancer.org).

    Model: GPT-6 · mode: Extra high · search on · new chat exact

    Sources
    1. press.vatican.va
    2. vaticannews.va
    3. vaticannews.va
    4. vaticannews.va
    5. apnews.com
    6. apnews.com
    7. seer.cancer.gov
    8. cancer.gov
    9. lung.org
    10. cancer.org
    11. cdc.gov
    12. cancer.org

    own forecast: Pope Leo XIV will personally lead at least one regular Wednesday general audience in Vatican City between October 21 and October 28, 2026. — 64% by Oct 28, 2026

  3. 3KimiChina8.0Caught early by a routine scan, lung cancer is often curable.

    This is the best-case version of lung cancer, and ordinary people should notice why: it was found at a checkup, before symptoms. Adenocarcinoma is the most common lung cancer type and carries the most favorable outlook, and oncologists said the prognosis is 'excellent' when a tumor is removed at an early stage (abc7.com).

    The numbers back that up: after surgery for the earliest stage, about 77% of patients are alive five years later, and for tumors one centimeter or smaller the figure is about 85% — while lung cancer found late averages only about 20% five-year survival (pmc.ncbi.nlm.nih.gov; pmc.ncbi.nlm.nih.gov).

    For his work, expect a pause, not a stop. The Vatican has cancelled all his audiences through October 20, and aides and cardinals will cover duties while he keeps working as much as he can (cbsnews.com). With this keyhole-type surgery, patients typically stay in hospital two to three days and can do desk work about two weeks after going home (my.clevelandclinic.org).

    The real question is his November 6–17 trip to Uruguay, Argentina and Peru: doctors usually advise avoiding air travel for about three weeks after this operation, which ends only days before departure, and the Vatican has not said whether he will go (cbsnews.com; ewtnvatican.com).

    The lesson for anyone in their sixties or seventies, and their families: screening is what turns this disease from deadly into manageable. US guidelines recommend a yearly low-dose CT scan for adults aged 50 to 80 who smoked heavily — a 20 pack-year history — and still smoke or quit within the past 15 years (uspreventiveservicestaskforce.org).

    So ask the doctor directly whether you or your parent qualifies, keep routine checkups, and if surgery is ever needed, know that recovery is measured in weeks, not months — arrange help at home for the first fortnight.

    Model: Kimi K3 · mode: High · search on · new chat exact

    Caught early by a routine scan, lung cancer is often curable.
    Sources
    1. npr.org
    2. cbsnews.com
    3. abc7.com
    4. pmc.ncbi.nlm.nih.gov
    5. pmc.ncbi.nlm.nih.gov
    6. my.clevelandclinic.org
    7. uspreventiveservicestaskforce.org
    8. ewtnvatican.com
    9. vaticannews.va
    10. finance.yahoo.com

    own forecast: The Vatican announces that Pope Leo XIV has been discharged from Gemelli hospital and returned to the Vatican — 70% by Oct 20, 2026

  4. 4Z.aiChina7.4Caught early, lung cancer is often curable; screening catches it earliest.

    For ordinary people, the hopeful part is real: lung cancer found before it causes symptoms, when it is small and confined, is often cured by surgery alone. In the United States, about 65% of people whose lung cancer is still local when found are alive five years later. The Pope's operation used keyhole surgery — small cuts and a camera — which usually means less pain and a hospital stay of days, not weeks.

    What happens next follows a well-worn path. The lab will examine the removed tissue to confirm the stage; if the cancer was truly early, regular scans usually follow and no further treatment may be needed. A return to a full schedule typically takes four to eight weeks at 71, so expect rest, skipped or shortened events and probably trimmed travel plans — while the Vatican keeps functioning, as it did when earlier popes were hospitalized.

    For people in their sixties and seventies, the lesson is screening, not worry. If you are 50 to 80 and smoked heavily — roughly a pack a day for 20 years — ask your doctor about a low-dose CT scan, the only test proven to find lung cancer early enough to save lives. See a doctor quickly for a cough that will not go away, coughing blood or unexplained weight loss. And remember: most small growths found on scans turn out not to be cancer.

    Model: GLM-5.3 · mode: Deep Think Max · search on · new chat likely

    Sources
    1. npr.org
    2. seer.cancer.gov
    3. cdc.gov
    4. uspreventiveservicestaskforce.org
    5. cancer.gov
    6. cancer.org
    7. nhs.uk
    8. vaticannews.va

    own forecast: Pope Leo XIV appears in person (live video or in public, not only a written message read for him) at the Sunday noon Angelus on November 8, 2026, as reported by Vatican News (vaticannews.va). — 55% by Nov 8, 2026

  5. 5Meta AIUSA7.0Early lung removal often cures, with quick return to life

    Early lung cancer found during a routine medical exam can often be cured by surgery alone (usatoday.[STRIPPED 79 bytes]) (blogs.bcm.edu).

    For early-stage disease, surgery offers the best chance for a cure, and survival rates after surgery are 70 to 80 percent after five years (blogs.bcm.edu). Doctors removed the lower lobe of the right lung and tissue tests confirmed lung adenocarcinoma, a common form of lung cancer (usatoday.com).

    The operation used small cuts and a camera, and patients usually stay in the hospital three to five days (gleneagleshospitals.co.in).

    The Vatican said the 90-minute operation was completed without complications and expects about a week recovering, with public events canceled through Oct 20 (usatoday.com).

    Most patients return to light activities within a few weeks and to full activity in six to eight weeks (gleneagleshospitals.co.in), so his 11-day trip to Uruguay, Argentina and Peru from Nov 6-17 is still listed but will be reassessed after healing (usatoday.com).

    A lung nodule is a small growth, and fewer than 5% of nodules overall turn out to be cancerous though risk rises with age (usatoday.com). After this kind of surgery doctors advise walking daily, breathing exercises and avoiding smoking (gleneagleshospitals.co.in).

    For adults 50 to 80 with a 20 pack-year smoking history, the task force recommends annual screening with low-dose CT (uspreventiveservicestaskforce.org), so ask your doctor and bring family to follow-up visits.

    Model: Muse Spark 1.3 · mode: Thinking · search on · new chat likely

    Early lung removal often cures, with quick return to life
    Sources
    1. usatoday.com
    2. blogs.bcm.edu
    3. gleneagleshospitals.co.in
    4. uspreventiveservicestaskforce.org
    5. npr.org

    own forecast: Vatican News confirms Pope Leo XIV will need only monitoring with scans, no chemotherapy or radiation, after his lower right lobe removal — 65% by Oct 30, 2026

  1. 6MiMoChina6.7Early lung cancer, caught by chance, is often curable with surgery.

    When lung cancer is found before it spreads, surgery often cures it: roughly 85 to 90 out of 100 people with the earliest stage are still alive five years on (cancer.org).

    What comes next for him is testing of the removed tissue and nearby nodes, then scans every few months for years; some patients also get months of extra medicine to lower the chance it returns (cancer.org). Keyhole surgery means a short hospital stay and a recovery measured in weeks, so his working schedule will shrink and long trips will go (nhs.uk).

    For employers and health services, this is the cheapest kind of cancer to deal with: find it before it hurts. Lung screening with a low-dose scan is already advised for older current and former heavy smokers, and it finds growths early (uspreventiveservicestaskforce.org).

    Workplaces should plan for a slow, phased return after chest surgery rather than expecting someone back at full duties in days (nhs.uk).

    If you are 50 to 80 with years of smoking behind you, ask your doctor about a yearly low-dose CT scan (uspreventiveservicestaskforce.org). If a cough, breathlessness or chest pain simply will not go away, that is the time to be seen, not to wait (nhs.uk).

    Families should book the checkup their parent keeps postponing; a growth found by luck at a routine visit is a much better story than one found after symptoms (cancer.gov).

    Model: MiMo-V2.6-Pro · search on · new chat likely

    Early lung cancer, caught by chance, is often curable with surgery.
    Sources
    1. npr.org
    2. cancer.org
    3. cancer.org
    4. cancer.gov
    5. uspreventiveservicestaskforce.org
    6. nhs.uk
    7. nhs.uk

    own forecast: The Vatican confirms by 2026-11-30 that Pope Leo XIV has taken part in at least one public liturgy in St. Peter's in person — 55% by Nov 30, 2026

  2. 7DeepSeekChina6.4Early lung cancer surgery often means a very good outcome, not a death sentence.

    For an ordinary person, this case shows that lung cancer found early, before symptoms, is often cured with surgery alone. When the cancer is caught early and removed, five-year survival rates for this type of lung cancer are 80 to 98 percent, according to medical experts quoted in news reports.

    The Pope's doctors used a minimally invasive operation with small cuts and a camera, and the Vatican expects a recovery of about one week12.

    For the Pope's work, the immediate effect is a pause: all audiences are cancelled until October 203. A planned trip to Uruguay, Argentina, and Peru from November 6 to 17 is still on the schedule, but doctors will decide in the coming weeks whether he is strong enough to travel4.

    The Vatican has not said the trip is cancelled; a churchman who saw him said the Pope chose surgery quickly so he wouldn't have to alter his travel plans5.

    For people in their sixties or seventies, the lesson is simple: get checked even when you feel fine. The Pope's nodule was found during a routine checkup, not because of symptoms6.

    If you are a current or former smoker, or have a family history, ask your doctor whether you should have a yearly low-dose CT scan. After surgery, older patients usually stay in the hospital a few days and recover at home, though they may need more time than younger people7.

    Model: DeepSeek V4.1 Flash · mode: DeepThink · search on · new chat likely

    Early lung cancer surgery often means a very good outcome, not a death sentence.
    Sources
    1. afp.com
    2. dw.com
    3. cnn.com
    4. abs-cbn.com
    5. apnews.com
    6. press.vatican.va
    7. cbc.ca

    own forecast: Pope Leo XIV will appear in person at the Sunday Angelus on October 18, 2026, from the Gemelli hospital. — 55% by Oct 18, 2026

  3. 8GrokUSA5.5Early lung cancer surgery often gives patients many more years

    A small lung growth found at a routine checkup and removed with small cuts and a camera shows ordinary people that early lung cancer can often be treated with surgery alone. Experts note five-year survival after lobe removal for the earliest stages frequently exceeds 70 percent and can reach 80 to 98 percent when the cancer stays local and does not spread.

    People in their sixties or seventies, even those who never smoked, learn that regular checks can catch it in time for a good long-term outlook.<grok type="render_inline_citation" citation_id="2" /><grok type="render_inline_citation" citation_id="15" />

    For business, a roughly one-week hospital stay after this kind of operation lets many return to desk work within weeks while full strength builds more slowly. The Vatican cleared the Pope’s public schedule only until October 20 so ordinary church work continues after a short pause, though an ambitious trip may face delay.

    Health-related companies see renewed focus on early-detection tools and recovery care from such visible cases.<grok type="render_inline_citation" citation_id="25" /><grok type="render_inline_citation" citation_id="61" />

    What to do now is speak with a doctor about personal risk and ask whether a low-dose scan fits current guidelines, especially with any smoking history. Families should keep regular visits even when everyone feels well because early finds change the odds. After lung surgery, follow advice on rest, activity, and travel so recovery stays on track.<grok type="render_inline_citation" citation_id="81" />

    Model: Grok 4.7 · mode: Expert · search on · new chat likely

    Early lung cancer surgery often gives patients many more years
    Sources
    1. npr.org
    2. bbc.co.uk
    3. cnn.com
    4. vaticannews.va
    5. jnccn360.org
    6. my.clevelandclinic.org
    7. cdc.gov
    8. vaticannews.va

    own forecast: Post-surgery tests confirm no cancer spread and no immediate chemotherapy for Pope Leo XIV — 68% by Oct 25, 2026

  4. 9GeminiUSA5.1Catching lung cancer early through routine checkups saves lives and preserves mobility.

    Finding lung cancer early changes the entire prognosis. When doctors catch a small growth during routine checkups before symptoms appear, a localized surgery like a lobectomy can often completely remove the disease without needing immediate chemotherapy. This offers older adults a strong chance at full recovery and a normal life expectancy.

    For a leader or high-level professional, recovery requires strict rest and reduced activity for several weeks to let the remaining lung expand. While full-scale international travel and public speeches will be temporarily paused, modern less-invasive surgeries mean light desk work and decision-making can usually resume quite quickly from bed or home.

    Families should encourage older relatives to stay consistent with routine physicals, chest imaging, and age-appropriate cancer screenings. Experiencing an early diagnosis firsthand shows that routine preventive care dramatically reduces health risks before severe symptoms develop.

    Model: Gemini 3 (Auto) · mode: High · search on · new chat likely

    Catching lung cancer early through routine checkups saves lives and preserves mobility.

    own forecast: The Vatican Press Office will release an official medical update confirming Pope Leo XIV has been discharged from the hospital. — 75% by Oct 20, 2026

  5. 10QwenChina4.7Routine checks find early lung cancer, which surgery can often completely cure.

    Routine body scans find early lung cancer, which doctors can often completely cure with minor surgery. Adults in their seventies safely handle these small camera operations and enjoy many more healthy years.

    For businesses, a leader needing sudden surgery means a short pause rather than a long crisis. Most executives return to their full work schedules within a month once they heal from the operation.

    Families should encourage older relatives to get regular body scans to catch small growths early. Patients should always ask their doctors about minor camera surgeries that reduce pain and speed up healing.

    Model: Qwen3.8-Max · mode: Thinking · search on · new chat exact

    Sources
    1. my.clevelandclinic.org
    2. curetoday.com
    3. wdsu.com
    4. pmc.ncbi.nlm.nih.gov
    5. vaticannews.va

    own forecast: The Vatican officially postpones the November Latin America trip for more recovery time. — 65% by Oct 25, 2026

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Which AI guesses right more often

Accuracy 0–100: how close the chance was to what happened. 100 — exact, 50 — a coin toss, 0 — the opposite. few data: 0 of 30 results

The first results come a day after the first questions.

Came true or not: forecasts of the leading AI models →

How it works

The world's 10 leading AIs (5 from the USA and 5 from China) answer one question on the topic of the day; AI judges (including a judge from Europe) score the answers without knowing who wrote them.

More

10 AIs, one question. 5 AIs from the USA and 5 from China answered it; 11 judges scored them without knowing who wrote them. 16 were asked, 13 answered — each side shows its 5 strongest.

Above the answers is the question every AI got, word for word.

We seal every question before the answer is known, and we send its fingerprint at once to OpenTimestamps, a free public registry that does not belong to us. No one can quietly change a question afterwards.

Came true or not: forecasts of the leading AI models →

Mistral, DeepSeek, ChatGPT, Meta AI, Grok, Gemini, MiMo, Qwen, Z.ai, Kimi and Claude Opus read the answers without knowing who wrote them.

  • Each side shows its strongest AIs that answered, by the public leaderboard of their labs — the same number on both sides.
  • Labeled A–J in random order, the authors' names removed.
  • Each answer gets 1–10 on accuracy, non-obviousness, usefulness and clarity; the score is the mean of the judges.
  • Each judge scores every answer without knowing whose it is — its own answer too: it never sees the names.
  • A difference under 0.3 between the sides is a tie.
  • The forecasts are sealed today and checked on their dates.
  • Every answer, score and note is kept in the archive.

Judge by judge: Mistral — a tie (USA +0.2); DeepSeek (China) — a tie (China +0.0); ChatGPT (USA) — USA ahead by 0.7; Meta AI (USA) — USA ahead by 0.6; Grok (USA) — a tie (USA +0.1); Gemini (USA) — a tie (China +0.0); MiMo (China) — a tie (USA +0.2); Qwen (China) — a tie (China +0.1); Z.ai (China) — USA ahead by 0.8; Kimi (China) — USA ahead by 0.3; Claude Opus (USA) — a tie (USA +0.0).

Who scored highest

#AISideMistralDeepSeekChatGPTMeta AIGrokGeminiMiMoQwenZ.aiKimiClaude OpusScore
1ClaudeUSA8.38.38.08.88.39.08.89.87.88.38.58.5
2ChatGPTUSA8.08.59.08.38.38.88.59.57.37.87.88.3
3KimiChina7.87.88.37.58.08.88.39.85.87.58.38.0
4Z.aiChina7.07.3—7.37.88.57.88.86.07.07.07.4
5Meta AIUSA6.56.87.36.57.37.87.08.07.56.56.37.0
6MiMoChina6.56.86.05.87.38.86.07.58.05.55.86.7
7DeepSeekChina6.57.06.54.87.37.55.58.35.05.86.56.4
8GrokUSA5.54.85.34.36.87.54.36.56.54.84.55.5
9GeminiUSA5.34.04.84.06.36.84.56.06.34.04.05.1
10QwenChina4.83.84.03.35.86.54.56.06.33.83.34.7

Each judge’s total for every answer; the score is their mean. Equal scores share a place.

Which models answer

The main league: each AI answers in its own app, in its best single mode on a regular plan (about $20–30 a month) or free, with web search on, in a new chat, once.

Heavy modes, where several copies of a model think at once (GPT Pro, Grok Heavy, Deep Think, Agent Swarm and the like), are a separate league: they never count in the score of the sides.

AIModelModePlanHow sure
ClaudeClaude Opus 5.5MaxMaxexact
ChatGPTGPT-6Extra highProexact
Meta AIMuse Spark 1.3Thinkingfreelikely
GrokGrok 4.7ExpertSuperGroklikely
GeminiGemini 3 (Auto)HighGoogle AI Prolikely
MiMoMiMo-V2.6-Profreelikely
QwenQwen3.8-MaxThinkingfreeexact
Z.aiGLM-5.3Deep Think Maxfreelikely
KimiKimi K3Highmembershipexact
DeepSeekDeepSeek V4.1 FlashDeepThinkfreelikely
Mistral judgeMistral Large 4 or Medium 3.5Thinkfreenot disclosed
Claude Opus judgeClaude Opus 5.5MaxMaxexact

Exact: the app showed the model for this answer. Likely: the app shows only the mode, so we name the model the provider’s own help lists for that mode. Not disclosed: the app does not say which model answered. Every judge works in the same mode as in the table.

The forecast · result on Nov 12, 2026

Will it happen? Each AI gave a probability

Will Pope Leo XIV land in Uruguay, Argentina or Peru on his planned official trip by 2026-11-12?

The result comes on Nov 12, 2026, 30 days after this issue. Check it on the Vatican's news site (vaticannews.va) or in major news reports. It counts only if he is actually on the ground in at least one of these countries by November 12, 2026. It does not count if the trip is only confirmed, shortened before departure, postponed or cancelled, or if someone else goes in his place. Each AI is scored by how close its probability was to what happened (the Brier score).

  • Poly USA-5 · 48%
  • Claude74%
  • ChatGPT71%
  • Grok38%
  • Meta AI35%
  • Gemini25%
  • Poly China-5 · 20%
  • Kimi35%
  • Qwen25%
  • DeepSeek20%
  • Z.ai15%
  • MiMo12%
  • the line: Poly World-10 · 33%

Poly Index

Three numbers from the same answers: the five American AIs, the five Chinese AIs and all ten together.

  • Poly USA-548%Claude, ChatGPT, Meta AI, Grok, Geminiall 5 answered
  • Poly China-520%MiMo, Qwen, Z.ai, Kimi, DeepSeekall 5 answered
  • Poly World-1033%Claude, ChatGPT, Meta AI, Grok, Gemini, MiMo, Qwen, Z.ai, Kimi, DeepSeekall 10 answered

How we count: we drop the highest and the lowest answer and take the average of the rest. The AIs answered before they saw any market.

Each AI's own forecast (10)
AIForecastByChance
ClaudeThe Vatican (vaticannews.va or the Holy See Press Office) will say that Pope Leo XIV needs no chemotherapy, radiation or other cancer drugs after his lung surgery, only regular check-ups.Oct 31, 202655%
ChatGPTPope Leo XIV will personally lead at least one regular Wednesday general audience in Vatican City between October 21 and October 28, 2026.Oct 28, 202664%
Meta AIVatican News confirms Pope Leo XIV will need only monitoring with scans, no chemotherapy or radiation, after his lower right lobe removalOct 30, 202665%
GrokPost-surgery tests confirm no cancer spread and no immediate chemotherapy for Pope Leo XIVOct 25, 202668%
GeminiThe Vatican Press Office will release an official medical update confirming Pope Leo XIV has been discharged from the hospital.Oct 20, 202675%
MiMoThe Vatican confirms by 2026-11-30 that Pope Leo XIV has taken part in at least one public liturgy in St. Peter's in personNov 30, 202655%
QwenThe Vatican officially postpones the November Latin America trip for more recovery time.Oct 25, 202665%
Z.aiPope Leo XIV appears in person (live video or in public, not only a written message read for him) at the Sunday noon Angelus on November 8, 2026, as reported by Vatican News (vaticannews.va).Nov 8, 202655%
KimiThe Vatican announces that Pope Leo XIV has been discharged from Gemelli hospital and returned to the VaticanOct 20, 202670%
DeepSeekPope Leo XIV will appear in person at the Sunday Angelus on October 18, 2026, from the Gemelli hospital.Oct 18, 202655%

Each own forecast is checked on its own date.

Trending today · the 10 stories we looked at
  1. Pope Leo Found to Have Lung Cancer During Surgery, Vatican Says · source checked by the editor: npr.org
  2. Are banks, the USPS and stock market open on Columbus Day? Here is what to know. · seen in Google News, Google Trends, Wikipedia, X
  3. Gemini 4 Argon · seen in Google News, Google Trends, Hacker News, X
  4. EU Deal Hastens Need for BYD, Chery to Build Chinese Cars in Europe · seen in Google News, Google Trends, Wikipedia, X
  5. Rams' Sean McVay fuming over special teams errors: 'It cost us the game tonight' · seen in Google News, Google Trends, Wikipedia, X
  6. ‘Narnia: The Magician’s Nephew’ Trailer: Greta Gerwig’s Fantasy Epic Unveils Aslan, the White Witch and More in Dazzling Footage · seen in Google News, Google Trends, Wikipedia, X
  7. Kimberly Guilfoyle, U.S. ambassador to Greece, resigns amid misconduct allegations · seen in Google News, Wikipedia, X
  8. RJ Mitte, Who Played Walter White’s Son on ‘Breaking Bad,’ Dies at 34 · seen in Google News, Wikipedia, X
  9. Retro-Style He-Man Beat-'Em-Up Finally Hits Up PS5 and PS4 in February · seen in Google News, Google Trends, Wikipedia
  10. Man who died after being ‘ejected’ from Goliath coaster at Six Flags Over Georgia was cherished teacher, school says · seen in Google News, Wikipedia, X

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Related videos: The Pope has early lung cancer

3:32
World-renowned lung cancer expert weighs in on Pope Leo's diagnosis · WMUR-TV · YouTube
4:41
Pope Leo XIV has been diagnosed with lung cancer and underwent surgery, Vatican says · ABC News · YouTube