GPT-5.6 Luna vs Kimi K2.6
GPT-5.6 Luna (OpenAI) vs Kimi K2.6 (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, GPT-5.6 Luna is the cheaper option and GPT-5.6 Luna has the larger context window.
Specs side by side
| Spec | GPT-5.6 Luna | Kimi K2.6 |
|---|---|---|
| Provider | OpenAI | Moonshot AI |
| Type | Text | Text |
| Context window | 1M | 256K |
| Max output | 128K | 256K |
| Input price | $0.20 / 1M | $0.95 / 1M |
| Output price | $1.20 / 1M | $4.00 / 1M |
| Speed | Fast | Medium |
| Arabic support | Strong | Partial |
Which should you choose?
- Lower cost, about 4.7× cheaper ($0.20 / 1M)
- Larger context window (1M) for long documents and codebases
- Rated faster (Fast) for latency-sensitive workloads
- Stronger Arabic support for Gulf and MENA use
- Moonshot's Kimi K2.6. Trillion-parameter MoE for strong agentic coding and tool-use at a low price, with 256K context
One OpenAI-compatible endpoint, one bill. Switch between them with a single model id change, pay per use, credits never expire.
Related comparisons
FAQ
What's the difference between GPT-5.6 Luna and Kimi K2.6?
GPT-5.6 Luna costs less ($0.20 / 1M vs $0.95 / 1M); GPT-5.6 Luna has a larger context window (1M vs 256K); GPT-5.6 Luna is rated faster; GPT-5.6 Luna has stronger Arabic support. Both are available on thalam behind one OpenAI-compatible API.
Is GPT-5.6 Luna or Kimi K2.6 cheaper?
GPT-5.6 Luna is cheaper on input ($0.20 / 1M vs $0.95 / 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 GPT-5.6 Luna and Kimi K2.6 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.