GPT-5.1 vs Kimi K2
Kimi K2 costs 69% less at typical usage ($1.07 vs $3.44 per 1M tokens). GPT-5.1 scores higher on 11 of 11 tasks.
| Spec | GPT-5.1 | Kimi K2 |
|---|---|---|
| Input /1M | $1.25 | $0.60 |
| Output /1M | $10.0 | $2.50 |
| Typical /1M | $3.44 | $1.07 |
| Context window | 400k | 256k |
| Speed | Brisk | Brisk |
| Privacy | Standard | Self-host |
| Open weights | No | Yes |
GPT-5.1
Steady since we started tracking (Jul 13, 2026)
Kimi K2
Steady since we started tracking (Jul 13, 2026)
Quality by task
Coding94/87
Agents93/90
Reasoning96/88
Writing92/86
Chat93/86
Classify88/83
Extract89/84
Summarize91/86
Translate90/84
Vision94/30
General94/86
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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.