Kimi-K2 vs Kimi K2.5
Kimi-K2 is cheaper on output tokens, while Kimi K2.5 offers a larger context window. Choose Kimi-K2 or Kimi K2.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Kimi-K2 | Kimi K2.5 |
|---|---|---|
| Provider | iFlow | MoonshotAI |
| Input / 1M tokens | $0.00 | $0.50 |
| Output / 1M tokens | $0.00 | $2.50 |
| Context window | 128K | 262K |
| Parameters | 1T | 1T |
| Open weights | No | Yes |
| Released | Dec 2024 | Jan 2026 |
| LiveBench score | — | 69.2 |
| SWE-bench Multilingual score | — | 67.3 |
| SWE-bench Verified score | — | 70.8 |
| Epoch Capabilities Index score | — | 148 |
| LMArena (Chatbot Arena) Elo score | — | 1445 |
| LMArena WebDev Elo score | — | 1436 |
| LMArena Vision Elo score | — | 1269 |
FAQ
Is Kimi-K2 or Kimi K2.5 cheaper?
Kimi-K2 is cheaper on output tokens ($0.00 vs $2.50 per 1M).
Which has the larger context window, Kimi-K2 or Kimi K2.5?
Kimi K2.5 has the larger context window (262K tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.