Claude Sonnet 4.5vsClaude 3.5 Sonnet
Across 4 shared benchmarks, Claude Sonnet 4.5 leads overall: Claude Sonnet 4.5 wins 4, Claude 3.5 Sonnet wins 0, with 0 ties and an average score difference of +10.17.
Claude Sonnet 4.5
Anthropic · 2025-09-30 · Chat model
Claude 3.5 Sonnet
Anthropic · 2024-06-21 · Multimodal model
Claude Sonnet 4.54 wins(100%)(0%)0 winsClaude 3.5 Sonnet
Benchmark scores
Grouped by capability, sorted by largest gap within each. 4 shared benchmarks.
General Knowledge
Claude Sonnet 4.5 2/2| Benchmark | Claude Sonnet 4.5 | Claude 3.5 Sonnet | Diff |
|---|---|---|---|
| GPQA Diamond | 83.4058 / 178 | 59.40141 / 178 | +24 |
| MMLU Pro | 887 / 126 | 77.6474 / 126 | +10.36 |
Math and Reasoning
Claude Sonnet 4.5 2/2| Benchmark | Claude Sonnet 4.5 | Claude 3.5 Sonnet | Diff |
|---|---|---|---|
| FrontierMath | 5.2038 / 60 | 152 / 60 | +4.20 |
| FrontierMath - Tier 4 | 2.1056 / 80Normal (No Tools) | 072 / 80Normal (No Tools) | +2.10 |
Specs
| Field | Claude Sonnet 4.5 | Claude 3.5 Sonnet |
|---|---|---|
| Publisher | Anthropic | Anthropic |
| Release date | 2025-09-30 | 2024-06-21 |
| Model type | Chat model | Multimodal model |
| Architecture | Dense | Dense |
| Parameters | Not available | Not available |
| Context length | 1000K | 200K |
| Max output | 64K | Not available |
Summary
- Claude Sonnet 4.5leads in:General Knowledge (2/2), Math and Reasoning (2/2)
On average across the 4 shared benchmarks, Claude Sonnet 4.5 scores 10.17 higher.
Largest single-benchmark gap: GPQA Diamond — Claude Sonnet 4.5 83.40 vs Claude 3.5 Sonnet 59.40 (+24).
Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.