Expired50% confidenceBenchmarkExact time
GPT-5.5 and Claude Mythos 5 both remain at around 88% on Terminal Bench 2.1.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/21/2026
First Seen
Valid until: 10/19/2026(expired)
Sources
Related Claims
UnverifiedGPT 5.5 leads on TerminalBench 2.0 with a score of 87%, surpassing even Anthropic's unreleased Mythos model81% similarUnverifiedOn Terminal Bench 2.1, GPT-5.6 Soul Ultra ranks first with a score of 91.9, while Claude Mythos 5 ranks third.76% similarUnverifiedGPT-5.6 Sol in standard mode surpasses Claude Mythos 5 on Terminal Bench 2.1, and with Ultra Mode enabled, the score reaches 91.9%.74% similarPartially VerifiedOpenAI states that GPT-5.6 achieves the current state-of-the-art on Terminal Bench 2.1.74% similarUnverifiedGPT-5.2 Codex scores slightly higher than GPT-5.2 on SWBench Pro and about 2 percentage points higher on Terminal Bench.71% similar
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