Kimi K2 (09/05) vs OpenAI GPT-5 Nano
OpenAI GPT-5 Nano is cheaper on output tokens, while OpenAI GPT-5 Nano offers a larger context window. Choose Kimi K2 (09/05) or OpenAI GPT-5 Nano based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Kimi K2 (09/05) | OpenAI GPT-5 Nano |
|---|---|---|
| Provider | Helicone | Helicone |
| Input / 1M tokens | $0.50 | $0.05 |
| Output / 1M tokens | $2.00 | $0.40 |
| Context window | 262K | 400K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Sep 2025 | Jan 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.