COP31 negotiators adopt a formal final decision text by November 20, 2026.

Question

Six frontier AI models put this at 27% by 7 Dec 2026. Full reasoning from every model.

WillHappen.ai · Accepted Answer

27% — the median of 6 frontier models, resolving by 2026-12-07.

Answer

Gemini (Google): 12% — UN climate summits almost invariably blow past their scheduled Friday closure deadlines into overtime to reach consensus. Nearly every COP since 2007 (including COPs 25-29) extended into Saturday or Sunday due to late-stage finance and text deadlocks. Unanimous consensus among 190+ parties requires exhausting brinkmanship, making on-time adoption on November 20 historically rare. A strictly procedural mandate or exceptional Turkish presidency control could wrap on time, but base rates strongly contraindicate it.

Answer

Claude (Anthropic): 22% — COPs almost always overrun their scheduled close date before adopting final texts. Every COP since at least COP21 has extended past its official closing date by 12-40+ hours before gavel-down. COP31 is scheduled to close Nov 20, so adoption that exact day is historically rare even if overall outcome eventually succeeds. Watch whether Turkish COP presidency pushes for strict on-time closure or lets talks bleed into Nov 21-22 as is typical.

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GPT (OpenAI): 82% — This chiefly depends on Türkiye closing a politically acceptable package during the final 48 hours. COP presidencies and UNFCCC secretariat can extend late-night sessions and gavel decisions before the scheduled close. Recent COPs routinely produce cover decisions, though agreement often slips past the advertised final day, as at COP28. Odds fall if finance, fossil-fuel language, or implementation rules become a blocking North-South dispute; a Nov. 19 draft would raise confidence.

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Grok (xAI): 24% — Whether COP31 gavels a closing package on the published last day instead of the usual overtime. Recent COPs 26–29 all ran 1–2 days past the scheduled Friday close; the presidency must still gavel texts on 20 Nov itself. Finance and NCQG leftovers plus any agenda fight have to be cleared in week one or the clock overruns. A pre-agreed co-presidency deal or empty first-week stocktake would be the clearest upward surprise.

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DeepSeek (DeepSeek): 88% — Whether Türkiye can gavel a package on schedule or a finance fight forces overtime past November 20. Every COP since 1995 has produced a final decision text, though several ran past their scheduled close (Madrid 2019 went 25 hours over). Türkiye holds the presidency and has every incentive to gavel a package on schedule; the main risk is a fight over the new climate finance goal. The one thing that would flip this: a major bloc (G77+China or the EU) refusing to close without a specific finance number, pushing adoption past November 20.

Answer

Qwen (Alibaba): 30% — Recent COPs have consistently overrun their scheduled end date by 1–2 days, making on-time adoption the exception rather than the rule. COP26, 27, 28, and 29 each adopted final texts 1–2 days past their scheduled close, establishing a strong recent pattern of overruns. Türkiye may push for punctuality as a reputational signal, but consensus-based plenary objections from even one bloc (as India did at COP26) can force extensions. A shift to 40%+ would require early signals of a pre-negotiated, uncontroversial package with no holdout blocs emerging in the final days.

COP31 negotiators adopt a formal final decision text by November 20, 2026.

COP31 outcome documents include explicit just-transition or social-justice provisions by November 20, 2026.

COP31 formally adopts agreed language on climate finance support and trade by November 20, 2026.

Formal waste-related pledges or implementation announcements are made at the COP31 World Leaders Summit by November 12, 2026.

COP31 concludes with an agreement resolving carbon-market rules by November 20, 2026.