Verified65% confidenceBenchmarkExact time
On 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%.
3
Sources
65%
Confidence
Medium-term (~90 days)
Relevance
9/25/2026
First Seen
Valid until: 12/24/2026
Sources
Related Entities
Related Claims
Partially VerifiedOpus 5.5 scored 66 on the Terminal agent benchmark, higher than Sonnet's 55 and Astra's 57.9.79% similarUnverifiedOpus 5.5 is not first across the board: on Automation Bench it scored 40, slightly below Astra's 41.4, and on Terminal Bench Science it trails GPT-6 Astra.75% similarUnverifiedClaude Opus 5.5 scores approximately 66.4 on Terminal Bench.74% similarUnverifiedOn Terminal-Bench 4.0, the standard version of Claude 5.1 scored 55.8% and the trusted version reached 60.9%; the OS World 2.0 partial completion rate was 77.9%.72% similar
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