Kimi K3 vs Kimi K3.1 Pro
Kimi K3 (Moonshot AI) vs Kimi K3.1 Pro (Moonshot AI), compared on price, context, speed and Arabic support. Both run on thalam through one OpenAI-compatible API, so you can switch between them with a single model id change. At a glance, Kimi K3.1 Pro is the cheaper option.
Specs side by side
| Spec | Kimi K3 | Kimi K3.1 Pro |
|---|---|---|
| Provider | Moonshot AI | Moonshot AI |
| Type | Text | Text |
| Context window | 1M | 1M |
| Max output | 400K | 400K |
| Input price | $3.00 / 1M | $2.00 / 1M |
| Output price | $15.00 / 1M | $10.00 / 1M |
| Speed | Medium | Medium |
| Arabic support | Partial | Partial |
Which should you choose?
- Moonshot's new flagship generation. A 1M-token context and the strongest measured reasoning in our catalog
- Lower cost, about 1.5× cheaper ($2.00 / 1M)
One OpenAI-compatible endpoint, one bill. Switch between them with a single model id change, pay per use, credits never expire.
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FAQ
What's the difference between Kimi K3 and Kimi K3.1 Pro?
Kimi K3.1 Pro costs less ($2.00 / 1M vs $3.00 / 1M). Both are available on thalam behind one OpenAI-compatible API.
Is Kimi K3 or Kimi K3.1 Pro cheaper?
Kimi K3.1 Pro is cheaper on input ($2.00 / 1M vs $3.00 / 1M). On thalam you pay per use, so you can route cheap-by-default and fall back to the other only when needed.
Can I use both Kimi K3 and Kimi K3.1 Pro with one API key?
Yes. thalam is OpenAI-compatible, so both models are reachable through the same endpoint. Switching between them is a one-line model id change, no code rewrite.