▸ compare
OpenAI: GPT-5.5 vs Anthropic: Claude Sonnet 4.5
Side-by-side benchmark comparison based on independent public data. Scores, pricing, context, and task breakdown.
▸ verdict
OpenAI: GPT-5.5
91.1
higher score
vs
Anthropic: Claude Sonnet 4.5
85.7
OpenAI: GPT-5.5 leads with a higher composite benchmark score. It's the stronger choice for general-purpose tasks based on public benchmark data.
▸ score breakdown
| Task | OpenAI: GPT-5.5 | Anthropic: Claude Sonnet 4.5 | Δ |
|---|---|---|---|
| Overall | 91.1 | 85.7 | +5.4 |
| Coding | — | 59.8 | — |
| Reasoning | 78.4 | 45.3 | +33.1 |
| Math | — | — | — |
| Writing | 88.7 | 84.3 | +4.4 |
| JSON | — | 28.6 | — |
▸ specs & pricing
| Attribute | OpenAI: GPT-5.5 | Anthropic: Claude Sonnet 4.5 |
|---|---|---|
| Provider | Openai | Anthropic |
| Context window | 1M | 1M |
| Input $/M tokens | $5.00/M | $3.00/M |
| Output $/M tokens | $30.00/M | $15.00/M |
| Weights | proprietary | proprietary |
▸ frequently asked
Is OpenAI: GPT-5.5 better than Anthropic: Claude Sonnet 4.5?
OpenAI: GPT-5.5 scores higher overall (91.1 vs 85.7) in the benchmark composite. The best choice depends on the specific use case and budget.
Which is cheaper: OpenAI: GPT-5.5 or Anthropic: Claude Sonnet 4.5?
Anthropic: Claude Sonnet 4.5 is cheaper at $3/M input tokens vs $5/M for OpenAI: GPT-5.5.
Which model is better for coding?
Both models perform similarly on coding benchmarks (SWE-Bench, Aider Polyglot, LiveCodeBench).