Claude Sonnet 4.5 vs GPT-5 nano
GPT-5 nano costs 98% less at typical usage ($0.14 vs $6.00 per 1M tokens). Claude Sonnet 4.5 scores higher on 11 of 11 tasks.
| Spec | Claude Sonnet 4.5 | GPT-5 nano |
|---|---|---|
| Input /1M | $3.00 | $0.05 |
| Output /1M | $15.0 | $0.40 |
| Typical /1M | $6.00 | $0.14 |
| Context window | 200k | 400k |
| Speed | Brisk | Blazing |
| Privacy | Strong | Standard |
| Open weights | No | No |
Claude Sonnet 4.5
Steady since we started tracking (Jul 13, 2026)
GPT-5 nano
Steady since we started tracking (Jul 13, 2026)
Quality by task
Coding95/72
Agents95/68
Reasoning93/74
Writing93/76
Chat91/80
Classify88/82
Extract90/80
Summarize92/80
Translate88/80
Vision90/78
General93/76
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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.