Claude Sonnet 4.5vsClaude 3.5 Sonnet New
Across 6 shared benchmarks, Claude Sonnet 4.5 leads overall: Claude Sonnet 4.5 wins 6, Claude 3.5 Sonnet New wins 0, with 0 ties and an average score difference of +16.48.
Claude Sonnet 4.5
Anthropic · 2025-09-30 · Chat model
Claude 3.5 Sonnet New
Anthropic · 2024-10-22 · Chat model
Claude Sonnet 4.56 wins(100%)(0%)0 winsClaude 3.5 Sonnet New
Benchmark scores
Grouped by capability, sorted by largest gap within each. 6 shared benchmarks.
Coding and Software Engineer
Claude Sonnet 4.5 2/2| Benchmark | Claude Sonnet 4.5 | Claude 3.5 Sonnet New | Diff |
|---|---|---|---|
| SWE-bench Verified | 826 / 108 | 4993 / 108 | +33 |
| LiveCodeBench | 7147 / 120 | 38.70102 / 120 | +32.30 |
General Knowledge
Claude Sonnet 4.5 2/2| Benchmark | Claude Sonnet 4.5 | Claude 3.5 Sonnet New | Diff |
|---|---|---|---|
| GPQA Diamond | 83.4058 / 178 | 65131 / 178 | +18.40 |
| MMLU Pro | 887 / 126 | 7869 / 126 | +10 |
Math and Reasoning
Claude Sonnet 4.5 2/2| Benchmark | Claude Sonnet 4.5 | Claude 3.5 Sonnet New | Diff |
|---|---|---|---|
| FrontierMath | 5.2038 / 60 | 2.1047 / 60 | +3.10 |
| FrontierMath - Tier 4 | 2.1056 / 80Normal (No Tools) | 072 / 80Normal (No Tools) | +2.10 |
Specs
| Field | Claude Sonnet 4.5 | Claude 3.5 Sonnet New |
|---|---|---|
| Publisher | Anthropic | Anthropic |
| Release date | 2025-09-30 | 2024-10-22 |
| Model type | Chat model | Chat model |
| Architecture | Dense | Dense |
| Parameters | Not available | Not available |
| Context length | 1000K | 200K |
| Max output | 64K | Not available |
Summary
- Claude Sonnet 4.5leads in:Coding and Software Engineer (2/2), General Knowledge (2/2), Math and Reasoning (2/2)
On average across the 6 shared benchmarks, Claude Sonnet 4.5 scores 16.48 higher.
Largest single-benchmark gap: SWE-bench Verified — Claude Sonnet 4.5 82 vs Claude 3.5 Sonnet New 49 (+33).
Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.