Modelpeers
Claude Code characterClaude Opus 5 character

Claude Opus 5 and Claude Code

2 products from Anthropic

Benchmark

Opus 5 in Claude Code scores 53.9% on Terminal-Bench 4.0 at xhigh effort

Claude Code with Opus 5 scored 53.94% at xhigh, 51.82% at max (posted August 27), 50.3% at high, 44.85% at medium and 34.85% at low, each over 330 trials.

Who is affected:
Teams still on Opus 5 deciding whether to move to Opus 5.5.
What to do:
Compare against Opus 5.5 (64.85%) before upgrading.

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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