Model card
Claude Sonnet 4.5.
Anthropicapi
§ 01 · Benchmarks
Every benchmark Claude Sonnet 4.5 has a recorded score for.
| # | Benchmark | Area · Task | Metric | Value | Rank | Date | Source |
|---|---|---|---|---|---|---|---|
| 01 | Tau2-Bench | Agentic AI · Tool Use | pass_rate | 63.0% | #4 | 2025-09-29 | source ↗ |
| 02 | LiveCodeBench Pro | Computer Code · Code Generation | elo | 1412.00 | #6 | — | source ↗ |
| 03 | MMLU | Reasoning · Commonsense Reasoning | accuracy | 90.4% | #12 | 2025-12-01 | source ↗ |
Rank column shows this model’s position vs all other models scored on the same benchmark + metric (competitors after the slash). #1 in red means current SOTA. Sorted by rank, then newest result.
§ 02 · Strengths by area
Where Claude Sonnet 4.5 actually performs.
§ 04 · Related models
Other Anthropic models scored on Codesota.
Claude Opus 4
Undisclosed params · 13 results · 2 SOTA
Claude Opus 4.5
3 results · 2 SOTA
Claude Sonnet 5
Undisclosed params · 2 results · 2 SOTA
Claude Sonnet 4
10 results · 1 SOTA
Claude Mythos Preview
1 result · 1 SOTA
Claude 3.5 Sonnet
Undisclosed params · 27 results
Claude Opus 4.5
Undisclosed params · 13 results
Claude 3.7 Sonnet
10 results
§ 05 · Sources & freshness
Where these numbers come from.
editorial
1
result
livecodebench-pro-official
1
result
codesota-shadow-mmlu
1
result
2 of 3 rows marked verified. · first result 2025-09-29, latest 2025-12-01.