GPT-6 Luna vs Kimi K2.5
Price, context window & benchmark comparison
VS
Compare different models
Verdict: GPT-6 Luna is 4.5× cheaper than Kimi K2.5 on a typical 3:1 input/output mix. GPT-6 Luna has the larger context window (1.1M vs 262K).
| GPT-6 Luna | Kimi K2.5 | |
|---|---|---|
| Input price / 1M | $0.10 | $0.45 |
| Output price / 1M | $0.50 | $2.25 |
| Blended price (3:1) | $0.20 | $0.90 |
| Cached input / 1M | $0.01 | $0.07 |
| Context window | 1.1M | 262K |
| Max output | 128K | 236K |
| Intelligence index | 37.3 | — |
| Coding index | — | 46.8 |
| Providers | 7 | — |
| Best provider uptime (30m) | 100.0% | — |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-09-22 | 2026-01-27 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, GPT-6 Luna or Kimi K2.5?
GPT-6 Luna is 4.5× cheaper than Kimi K2.5 on a typical 3:1 input/output mix.
GPT-6 Luna vs Kimi K2.5: which has a bigger context window?
GPT-6 Luna: 1,050,000 tokens. Kimi K2.5: 262,144 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GPT-6 Luna ≈ $450.00, Kimi K2.5 ≈ $2,025.
More comparisons
GPT-6 Luna vs GLM 5.3 PrimeGPT-6 Luna vs Qwen3.8 Max PrimeGPT-6 Luna vs Command A+GPT-6 Luna vs GPT-6 Luna ProGPT-6 Luna vs GPT-6 Sol ProGPT-6 Luna vs GPT-6 SolGPT-6 Luna vs Claude Opus 5.5GPT-6 Luna vs MiMo-V2.6-Pro-UltraSpeedGPT-6 Luna vs MiMo-V2.6-FlashGPT-6 Luna vs Grok 4.7GPT-6 Luna vs Qwen3.8 Omni FlashGPT-6 Luna vs GLM 5.3 FlashXGPT-6 Luna vs DeepSeek V4.1 FlashGPT-6 Luna vs GPT-6 AstraGPT-6 Luna vs GPT-6 Astra ProGPT-6 Luna vs Qwen3.8 Max (0902)Kimi K2.5 vs GLM 5.3 PrimeKimi K2.5 vs Qwen3.8 Max PrimeKimi K2.5 vs Command A+Kimi K2.5 vs GPT-6 Luna ProKimi K2.5 vs GPT-6 Sol ProKimi K2.5 vs GPT-6 SolKimi K2.5 vs Claude Opus 5.5Kimi K2.5 vs MiMo-V2.6-Pro-UltraSpeed