Claude Opus 4.8 vs Kimi K3
Claude Opus 4.8 (Anthropic) vs Kimi K3 (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 is the cheaper option.
Specs side by side
| Spec | Claude Opus 4.8 | Kimi K3 |
|---|---|---|
| Provider | Anthropic | Moonshot AI |
| Type | Text | Text |
| Context window | 1M | 1M |
| Max output | 128K | 400K |
| Input price | $5.00 / 1M | $3.00 / 1M |
| Output price | $25.00 / 1M | $15.00 / 1M |
| Speed | Medium | Medium |
| Arabic support | Strong | Partial |
Which should you choose?
- Stronger Arabic support for Gulf and MENA use
- Lower cost, about 1.7× cheaper ($3.00 / 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 Claude Opus 4.8 and Kimi K3?
Kimi K3 costs less ($3.00 / 1M vs $5.00 / 1M); Claude Opus 4.8 has stronger Arabic support. Both are available on thalam behind one OpenAI-compatible API.
Is Claude Opus 4.8 or Kimi K3 cheaper?
Kimi K3 is cheaper on input ($3.00 / 1M vs $5.00 / 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 Claude Opus 4.8 and Kimi K3 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.