Compare KAT-Coder-Pro V1 from kwaipilot 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.


KAT-Coder-Pro V1 and Step3 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
KAT-Coder-Pro V1, from kwaipilot, has a 262,144-token context window and is priced by the provider serving it on OpenRouter.
Step3, from stepfun-ai, has a 65,536-token context window and is priced by the provider serving it on OpenRouter.
| Attribute | KAT-Coder-Pro V1 | Step3 |
|---|---|---|
| Input price | Pricing varies by provider | Pricing varies by provider |
| Output price | Pricing varies by provider | Pricing varies by provider |
| Context window | 262,144 tokens | 65,536 tokens |
| Intelligence Index | 18.6 | 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
KAT-Coder-Pro V1 has the longer context window at 262,144 tokens, compared with 65,536 tokens for Step3.