Compare Kimi K2 Thinking from moonshotai and Step3 from stepfun-ai on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.


Kimi K2 Thinking and Step3 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Kimi K2 Thinking, from moonshotai, has a 262,144-token context window and is priced at $0.60/M tokens input, $2.50/M tokens output on OpenRouter.
Step3, from stepfun-ai, has a 65,536-token context window and is priced by the provider serving it on OpenRouter.
| Attribute | Kimi K2 Thinking | Step3 |
|---|---|---|
| Input price | $0.60/M tokens | Pricing varies by provider |
| Output price | $2.50/M tokens | Pricing varies by provider |
| Context window | 262,144 tokens | 65,536 tokens |
| Intelligence Index | 22.0 | Not available |
| Coding Index | Not available | Not available |
| Agentic Index | Not available | Not available |
| Latency (p50) | Not available | Not available |
| Throughput (p50) | Not available | Not available |
Benchmark data updated
Kimi K2 Thinking has the longer context window at 262,144 tokens, compared with 65,536 tokens for Step3.