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Claude Code characterClaude Opus 5.5 character

Claude Opus 5.5 and Claude Code

2 products from Anthropic

Benchmark

Opus 5.5 in Claude Code tops the official Terminal-Bench 4.0 leaderboard at 64.8%

Claude Code with Opus 5.5 at max effort resolved 64.85% of Terminal-Bench 4.0 tasks (plus or minus 3.1, 330 trials, $4,718.65 total cost), ranked first. The entry was posted October 6, 2026.

Source

"Resolution rate of Terminal-Bench 4.0 tasks. The whiskers span the 95% confidence interval."

Terminal-Bench leaderboard (tbench.ai)

Published

Open the sourcetbench.ai

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