Expired65% confidenceBenchmarkExact time
In the Agents' Last Exam benchmark, GPT-5.6 Sol achieved a score of 53.6, which is 13.1 points higher than Claude Fable 5 using adaptive reasoning.
3
Sources
65%
Confidence
Medium-term (~90 days)
Relevance
7/13/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/11/2026(expired)
Sources
Related Claims
UnverifiedIn the long-cycle agentic workflow test (Engines Last Exam), GPT-5.6 Sol scored 53.6, outperforming Faber-5 by 13.1 points.84% similarUnverifiedGPT-5.6 set a new all-time high score of 53.6 on the Agent's Last Exam benchmark, surpassing Claude Opus 4.5 by 13.1 points.82% similarUnverifiedOn Artificial Analysis's Omniscience hallucination metric, GPT-5.6 Sol Max reached 89%, higher than Claude Fable's 55% and GLM 5.2's 28%.81% similarUnverifiedOn the SWE-Bench Pro programming benchmark, Claude Fable 5 leads with a score of 80%, ahead of GPT-5.6 Sol's 64.6%.81% similarUnverifiedAt ultra-high reasoning intensity, GPT-6.1 Sol's factual error rate is 4.1%, lower than the previous generation's 4.5% and close to Astra's 4.0%.78% similar
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