▸ compare
Anthropic: Claude Opus 4.5 vs Anthropic: Claude Sonnet 4.5
Side-by-side benchmark comparison based on independent public data. Scores, pricing, context, and task breakdown.
▸ verdict
Anthropic: Claude Opus 4.5
86.3
vs
Anthropic: Claude Sonnet 4.5
85.7
These two models are effectively tied on overall score within the two-point margin. Choose based on pricing, context window, or task-specific performance below.
▸ score breakdown
| Task | Anthropic: Claude Opus 4.5 | Anthropic: Claude Sonnet 4.5 | Δ |
|---|---|---|---|
| Overall | 86.3 | 85.7 | +0.6 |
| Coding | 69.1 | 59.8 | +9.3 |
| Reasoning | 71.8 | 45.3 | +26.5 |
| Math | — | — | — |
| Writing | 84.8 | 84.3 | +0.5 |
| JSON | 46.1 | 28.6 | +17.5 |
▸ specs & pricing
| Attribute | Anthropic: Claude Opus 4.5 | Anthropic: Claude Sonnet 4.5 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Context window | 200K | 1M |
| Input $/M tokens | $5.00/M | $3.00/M |
| Output $/M tokens | $25.00/M | $15.00/M |
| Weights | proprietary | proprietary |
▸ frequently asked
Is Anthropic: Claude Opus 4.5 better than Anthropic: Claude Sonnet 4.5?
Anthropic: Claude Opus 4.5 and Anthropic: Claude Sonnet 4.5 are closely matched in overall score. Choose based on pricing, context window, or the task-specific scores in the table above.
Which is cheaper: Anthropic: Claude Opus 4.5 or Anthropic: Claude Sonnet 4.5?
Anthropic: Claude Sonnet 4.5 is cheaper at $3/M input tokens vs $5/M for Anthropic: Claude Opus 4.5.
Which model is better for coding?
Anthropic: Claude Opus 4.5 leads on coding with a score of 69.1 vs 59.8 for Anthropic: Claude Sonnet 4.5. This is based on SWE-Bench, Aider Polyglot, and LiveCodeBench data.