▸ compare
Anthropic: Claude Opus 4.5 vs OpenAI: GPT-5.1
Side-by-side benchmark comparison based on independent public data. Scores, pricing, context, and task breakdown.
▸ verdict
Anthropic: Claude Opus 4.5
86.2
higher score
vs
OpenAI: GPT-5.1
81.1
Anthropic: Claude Opus 4.5 leads with a higher composite benchmark score. It's the stronger choice for general-purpose tasks based on public benchmark data.
▸ score breakdown
| Task | Anthropic: Claude Opus 4.5 | OpenAI: GPT-5.1 | Δ |
|---|---|---|---|
| Overall | 86.2 | 81.1 | +5.1 |
| Coding | 69.1 | 61.1 | +8.0 |
| Reasoning | 71.7 | 68.4 | +3.3 |
| Math | — | 84.0 | — |
| Writing | 84.7 | 80.0 | +4.7 |
| JSON | 46.1 | — | — |
▸ specs & pricing
| Attribute | Anthropic: Claude Opus 4.5 | OpenAI: GPT-5.1 |
|---|---|---|
| Provider | Anthropic | Openai |
| Context window | 200K | 400K |
| Input $/M tokens | $5.00/M | $1.25/M |
| Output $/M tokens | $25.00/M | $10.00/M |
| Weights | proprietary | proprietary |
▸ frequently asked
Is Anthropic: Claude Opus 4.5 better than OpenAI: GPT-5.1?
Anthropic: Claude Opus 4.5 scores higher overall (86.2 vs 81.1) in the benchmark composite. The best choice depends on the specific use case and budget.
Which is cheaper: Anthropic: Claude Opus 4.5 or OpenAI: GPT-5.1?
OpenAI: GPT-5.1 is cheaper at $1.25/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 61.1 for OpenAI: GPT-5.1. This is based on SWE-Bench, Aider Polyglot, and LiveCodeBench data.