Will Anthropic have the best AI model at the end of September 2026?

Probability

52.5%↓ 2.0

Volume

$44K

Liquidity

$11K

Resolves

Sep 30, 2026

Best bid

1.0%

Best ask

99.0%

Midpoint

87.5%

Spread

1.0%

Probability history — 30 days

Summary

The market prices YES at 87.5%, down 2.0 points in the last 24 hours on $3K of daily volume. Over the charted period the probability has ranged between 41.5% and 91.5%, trending upward by 39.5 points overall. Liquidity of $11K makes this a thinner market — treat the printed probability with some caution.

Bull case

+Buyers of YES have been in control across the charted period — the probability climbed from 48.0% to 87.5%.
+Sustained volume ($44K lifetime) means the current price reflects real position-taking, not a stale quote.
+At 87.5%, YES pays roughly 1.1x if the event occurs.

Bear case

−The market has traded as low as 41.5% in this period — pricing is not settled.
−At 87.5%, NO pays roughly 8.0x if the event fails.
−Resolution is strict — read the criteria below carefully; markets often resolve NO on technicalities.

AI insight

This is a quantitative read derived from live Polymarket data only — no AI or news research was performed. Connect Ollama for local open-model analysis, or a hosted AI key for web-grounded research. Structurally: liquidity is thin, so the printed probability can move sharply on small orders, and the 2.0-point 24h move suggests no major new information in the last day.

Deterministic analysis from live Polymarket data only. Connect Ollama or a hosted AI key for generated reasoning.

Timeline

Jul 21
Charted period opens at 48.0%
Start of the available price history window.
Aug 16
Period high: 91.5%
Peak market-implied probability of YES.
Aug 17
Currently 87.5%
Latest print with $3K of 24h volume.

Resolution rules

This market will resolve according to the company which owns the model which has the highest arena rank based on the arena.ai Text Arena (Overall) when the table under the "Leaderboard" tab is checked on September 30, 2026, 12:00 PM ET. Results from the "Rank" column under the "Text Arena | Overall" Leaderboard tab at https://arena.ai/leaderboard/text/overall-no-style-control with style control off (Adjustments: None) and filtered for "Models" will be used to resolve this market. Models will be ordered primarily by their leaderboard rank at the market’s check time. If two or more models are tied on rank, they will be ordered by their Arena score, including any underlying, unrounded, granular values reflected in the data below the leaderboard. If a tie still remains, alphabetical order of company names as listed in this market group will be used as a final tiebreaker (e.g., if the two models are tied by exact arena score, “Google” would be ranked ahead of “SpaceXAI”). This market will resolve based on the company that occupies first place under this ranking. The resolution source for this market is the arena.ai Text Arena (Overall). If this resolution source is unavailable at check time, this market will remain open until the leaderboard comes back online and will resolve based on the first check after it becomes available. If it becomes permanently unavailable, this market will resolve to "Other".

Sources

Polymarket market page

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