Kimi K3 Flex vs Kimi K2.5 Fast
Kimi K2.5 Fast is cheaper on output tokens, while Kimi K3 Flex offers a larger context window. Choose Kimi K3 Flex or Kimi K2.5 Fast based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Kimi K3 Flex | Kimi K2.5 Fast |
|---|---|---|
| Provider | Neuralwatt | Neuralwatt |
| Input / 1M tokens | $1.95 | $0.52 |
| Output / 1M tokens | $9.75 | $2.59 |
| Context window | 1M | 262K |
| Parameters | — | — |
| Open weights | Yes | Yes |
| Released | Jul 2026 | Jan 2026 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.