Model results

Chartography

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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.

Official source

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Chartography w/ tools

Source: Anthropic (reviewed publisher results)
Version: unversioned
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); with tools; dated to the announcement

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Claude Opus 5.5
anthropic/claude-opus-5-5
89%
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