Claude Opus 4.5 vs GPT-5.1
GPT-5.1 costs 66% less at typical usage ($3.44 vs $10.0 per 1M tokens). Claude Opus 4.5 scores higher on 8 of 11 tasks.
| Spec | Claude Opus 4.5 | GPT-5.1 |
|---|---|---|
| Input /1M | $5.00 | $1.25 |
| Output /1M | $25.0 | $10.0 |
| Typical /1M | $10.0 | $3.44 |
| Context window | 200k | 400k |
| Speed | Measured | Brisk |
| Privacy | Strong | Standard |
| Open weights | No | No |
Claude Opus 4.5
Steady since we started tracking (Jul 13, 2026)
GPT-5.1
Steady since we started tracking (Jul 13, 2026)
Quality by task
Coding99/94
Agents99/93
Reasoning98/96
Writing96/92
Chat92/93
Classify90/88
Extract92/89
Summarize94/91
Translate90/90
Vision93/94
General96/94
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Prices are list $/1M tokens, hand-maintained from public provider pricing. Task scores are benchmark-informed 0-100 estimates, not gospel — validate on your own evals before moving production traffic. Not affiliated with any model provider.