Anthropic’s rapid September 2026 launch of Claude Fable 5.1 and Mythos 5.1 has driven the strongest HLE results to date, with Fable 5.1 posting 59.1–65% depending on the leaderboard and tool-use protocol. These releases emphasize adaptive reasoning, extended context handling, and agentic tool integration, extending the gains seen from Opus 5 and Fable 5 earlier in the year. Anthropic models now occupy the top three spots across major evaluations, outpacing OpenAI’s GPT-6 Astra and Google’s Gemini variants amid ongoing competitive pressure. With three months left in 2026 and Anthropic reportedly weighing further safety-reviewed drops, traders are watching for incremental gains from refined inference scaling or a potential new flagship that could push the frontier above 70%.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$108,131 Vol.
55%+
93%
60%+
49%
65%+
19%
70%+
12%
75%+
9%
$108,131 Vol.
55%+
93%
60%+
49%
65%+
19%
70%+
12%
75%+
9%
For resolution, “accuracy” refers solely to the value labeled “HLE Accuracy” or a clear equivalent metric if the data’s presentation or terminology is restructured, regardless of the model’s Calibration Error or any other displayed metric.
The resolution source will be the official Humanity’s Last Exam leaderboard at https://agi.safe.ai/. If the resolution source becomes unavailable during the listed timeframe, this market will remain open to allow the relevant data to become available again. If the source remains unavailable after the end of the listed timeframe or is otherwise confirmed to be permanently unavailable, official Humanity’s Last Exam results published elsewhere may be used. If no official alternative source is available, this market will resolve to "No".
Market Opened: Jul 23, 2026, 6:42 PM ET
Resolution Source
https://agi.safe.ai/Resolver
0x65070BE91...For resolution, “accuracy” refers solely to the value labeled “HLE Accuracy” or a clear equivalent metric if the data’s presentation or terminology is restructured, regardless of the model’s Calibration Error or any other displayed metric.
The resolution source will be the official Humanity’s Last Exam leaderboard at https://agi.safe.ai/. If the resolution source becomes unavailable during the listed timeframe, this market will remain open to allow the relevant data to become available again. If the source remains unavailable after the end of the listed timeframe or is otherwise confirmed to be permanently unavailable, official Humanity’s Last Exam results published elsewhere may be used. If no official alternative source is available, this market will resolve to "No".
Resolution Source
https://agi.safe.ai/Resolver
0x65070BE91...Anthropic’s rapid September 2026 launch of Claude Fable 5.1 and Mythos 5.1 has driven the strongest HLE results to date, with Fable 5.1 posting 59.1–65% depending on the leaderboard and tool-use protocol. These releases emphasize adaptive reasoning, extended context handling, and agentic tool integration, extending the gains seen from Opus 5 and Fable 5 earlier in the year. Anthropic models now occupy the top three spots across major evaluations, outpacing OpenAI’s GPT-6 Astra and Google’s Gemini variants amid ongoing competitive pressure. With three months left in 2026 and Anthropic reportedly weighing further safety-reviewed drops, traders are watching for incremental gains from refined inference scaling or a potential new flagship that could push the frontier above 70%.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated



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