Unverified50% confidenceBenchmarkExact time
On the Terminal-Bench 2.0 benchmark, the same model Opus 4.6 scores from 60.45% to 82.02% under different harnesses (a gap of about 22 percentage points).
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/24/2026
First Seen
Valid until: 1/22/2027
Sources
Related Entities
Related Claims
VerifiedOn Terminal Bench 4.0, Opus 5.5 scored 66.4%, Astra scored 57.9%, Fable 5.1 scored 55.8%, and the previous generation Opus 5 scored 52.3%.76% similarUnverifiedClaude Opus 5.5 scores approximately 66.4 on Terminal Bench.72% similarUnverifiedIn Automation Bench at medium reasoning intensity, GPT-6.1 Sol scored 35.4%, which is 2.2 percentage points higher than Opus 5.5 at one-third of the cost.71% similarUnverifiedClaude Opus 5 achieved a pass@20 of 79.09% on ThinkingBox, with an all-20 of 47.53% (241 tasks passing consistently).70% similar
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