▸ compare
Anthropic: Claude Sonnet 4.5 vs Anthropic: Claude Opus 4.5
Side-by-side benchmark comparison based on independent public data. Scores, pricing, context, and task breakdown.
▸ verdict
Anthropic: Claude Sonnet 4.5
85.2
vs
Anthropic: Claude Opus 4.5
83.6
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 Sonnet 4.5 | Anthropic: Claude Opus 4.5 | Δ |
|---|---|---|---|
| Overall | 85.2 | 83.6 | +1.6 |
| Coding | 59.2 | 68.8 | -9.6 |
| Reasoning | 43.3 | 71.6 | -28.3 |
| Math | — | — | — |
| Writing | 83.8 | 82.0 | +1.8 |
| JSON | 28.6 | 46.1 | -17.5 |
▸ specs & pricing
| Attribute | Anthropic: Claude Sonnet 4.5 | Anthropic: Claude Opus 4.5 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Context window | 1M | 200K |
| Input $/M tokens | $3.00/M | $5.00/M |
| Output $/M tokens | $15.00/M | $25.00/M |
| Weights | proprietary | proprietary |
▸ frequently asked
Is Anthropic: Claude Sonnet 4.5 better than Anthropic: Claude Opus 4.5?
Anthropic: Claude Sonnet 4.5 and Anthropic: Claude Opus 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 Sonnet 4.5 or Anthropic: Claude Opus 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 68.8 vs 59.2 for Anthropic: Claude Sonnet 4.5. This is based on SWE-Bench, Aider Polyglot, and LiveCodeBench data.