Model card
Claude Sonnet 4.5.
AnthropicapiUndisclosed params
§ 02 · Benchmarks
Every benchmark Claude Sonnet 4.5 has a recorded score for.
| # | Benchmark | Area · Task | Metric | Value | Rank | Date | Source |
|---|---|---|---|---|---|---|---|
| 01 | SWE-bench | Computer Code · Code Generation | resolve-rate-agentic | 77.2% | #9 | 2025-12-01 | |
| 02 | SWE-Bench Verified | Computer Code · Code Generation | resolve-rate | 77.2% | #9 | — | source ↗ |
| 03 | SWE-bench | Computer Code · Code Generation | resolve-rate | 77.2% | #11 | 2025-12-01 | source ↗ |
| 04 | SWE-bench | Computer Code · Code Generation | resolve-rate | 70.8% | #19 | 2025-09-01 | 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.
§ 03 · Strengths by area
Where Claude Sonnet 4.5 actually performs.
§ 04 · Papers
1 paper with results for Claude Sonnet 4.5.
- 2023-10-10· Computer Code· 2 results
SWE-bench: Can Language Models Resolve Real-World GitHub Issues?
Carlos E. Jimenez, John Yang, Alexander Wettig, Shunyu Yao et al.
§ 05 · Related models
Other Anthropic models scored on Codesota.
Claude Opus 4
Undisclosed params · 14 results · 2 SOTA
Claude Sonnet 5
Undisclosed params · 2 results · 2 SOTA
Claude Sonnet 4
11 results · 1 SOTA
Claude Opus 4.5
4 results · 1 SOTA
Claude Opus 4.7
2 results · 1 SOTA
Claude Mythos Preview
1 result · 1 SOTA
Claude 3.5 Sonnet
Undisclosed params · 28 results
Claude Opus 4.5
Undisclosed params · 12 results
§ 06 · Sources & freshness
Where these numbers come from.
anthropic-internal
1
result
anthropic-blog
1
result
swebench-leaderboard
1
result
sota-timeline
1
result
2 of 4 rows marked verified. · first result 2025-09-01, latest 2025-12-01.