Unverified50% confidenceBenchmarkExact time
On all 1534 questions of the BIRD dev set, Claude Opus 5.5 achieved 77.1% execution accuracy.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
10/24/2026
First Seen
Valid until: 11/7/2026
Sources
Related Entities
Related Claims
UnverifiedAccording to Anthropic's system card, Claude Opus 5.5 reaches 89.9% accuracy on SWE-bench Pro, and the BenchLM October 2026 leaderboard also repeats this figure.70% similarUnverifiedClaude Opus 5 achieved a pass@20 of 79.09% on ThinkingBox, with an all-20 of 47.53% (241 tasks passing consistently).69% similarUnverifiedIn the Tīrtha Bench shared comparison, the highest accuracy is 95.4%, achieved jointly by Grok 4.7 and Claude Opus 5.5.68% similar
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