Terminal-Bench 4.0
claude-code2.1.231
Reasoning effort max
Tested model identity
Sonnet 5anthropic/claude-sonnet-595% CI 9.36%–15.48%
n = 330Claude Sonnet 5 is Anthropic's most capable Sonnet model yet, built for coding, agents, and professional work at scale. It brings near-Opus intelligence to the model teams run at scale every day, with the same balance of capability, cost, and speed teams already rely on Sonnet for.
Scores appear here when an evaluation matches this exact model.
Terminal-Bench 4.0
2.1.231Reasoning effort max
anthropic/claude-sonnet-595% CI 9.36%–15.48%
n = 330Standard list rate
Catalog list rate. Plan allowances and temporary discounts are separate.
Cache write $2.5/M tokens · 1h cache write $4/M tokens · Web search $0.01/search
Cache write $2.5/M tokens · 1h cache write $4/M tokens · Web search $0.01/search
Cache write $2.5/M tokens · 1h cache write $4/M tokens · Web search $0.01/search
Cache write $2.5/M tokens · 1h cache write $4/M tokens · Web search $0.01/search
Cache write $2.5/M tokens · 1h cache write $4/M tokens · Web search $0.01/search
Cache write $2.75/M tokens · 1h cache write $4.4/M tokens · Web search $0.01/search
Cache write $2.75/M tokens · 1h cache write $4.4/M tokens · Web search $0.01/search
Cache write $2.75/M tokens · 1h cache write $4.4/M tokens · Web search $0.01/search
Cache write $2.75/M tokens · 1h cache write $4.4/M tokens · Web search $0.01/search
Cache write $2.75/M tokens · 1h cache write $4.4/M tokens · Web search $0.01/search
Experiential Labs · Discount
Paid Pro plan required, covering the first 2,000 credits of usage each month, then list price.
Checked Source ↗
anthropic/claude-sonnet-5anthropic/claude-sonnet-5claude-sonnet-5Updated Oct 18, 2026
Adds adjustable effort to the Haiku tier for compaction, browser tasks and narrowly scoped subagents.
Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding, computer use, and...
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
Tuned for quick iteration on scoped fixes and documents; Anthropic favors Opus 5.5 for open-ended work needing sustained judgment.