Comparison
GPT-5 mini vs Kimi K3
How GPT-5 mini and Kimi K3 compare on the numbers that decide the call - and how to switch between them without touching your code.
| Spec | GPT-5 mini | Kimi K3 |
|---|---|---|
| Input price / 1Mlower is cheaper | $0.25 | $3 |
| Output price / 1Mlower is cheaper | $2 | $15 |
| Context windowbigger fits more | 400K | 1.048576M |
| Typical speedfaster median | 380ms | 2.2s |
| Quality score | 82/100 | 94/100 |
| Provider | OpenAI | Moonshot AI |
Which should you pick?
- GPT-5 mini is cheaper on input tokens ($0.25 vs $3).
- Kimi K3 takes a larger context window (1.048576M tokens).
- GPT-5 mini is usually the faster to answer.
- Kimi K3 scores higher on the composite quality benchmark.
You do not have to choose permanently. Name one as your first choice and let Final Router fall back to the other when a provider fails - the request still gets answered, and the log shows which model replied.
Common questions
- Is GPT-5 mini or Kimi K3 cheaper?
- GPT-5 mini is cheaper on input tokens - $0.25 vs $3 per 1M. Neither is marked up: Final Router bills provider list price.
- Can I switch between GPT-5 mini and Kimi K3 without changing my code?
- Yes. Both are called through the same OpenAI-compatible endpoint - change only the model id ("openai/gpt-5-mini" or "moonshot/kimi-k3"), or let a routing policy fall back from one to the other automatically.