Model results
Terminal-Bench-Science
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Atlas snapshot captured 10/19/2026, 10:20:28 AM UTC. This is an import timestamp, not the evaluation date. Coverage may be incomplete.
Terminal-Bench-Science 0.1
- Source
- Anthropic (reviewed publisher results)
- Version
- 0.1
- Measurement date
- 2026-09-22
- Metric
- % · Higher is better
- Evaluation scope
- Vendor-reported in Anthropic's Claude Opus 5.5 launch table; adaptive thinking at max effort unless noted; evaluated with production safeguards on, and where they intervened, cybersecurity tasks fell back to Claude Opus 4.8 and biology/frontier-LLM tasks to Claude Opus 5 (Anthropic says this likely lowers scores); standard error ±3.5–5 pts; Anthropic's setup reproduces the public leaderboard's Opus 5 result within noise (29.0% vs 30.0%, 3 trials/task, Claude Code harness); dated to the announcement
Positions are withheld because at least one result lacks explicit independent provenance or a documented evaluation scope. Missing metadata is shown as unreported; matching imported metadata is not independent verification of the protocol.
Claude Opus 5.5
anthropic/claude-opus-5-5
58.7%
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