Kimi K3.1 Pro Highspeed vs GPT-5.5 Instant
Both have similar output pricing, while Kimi K3.1 Pro Highspeed offers a larger context window. Choose Kimi K3.1 Pro Highspeed or GPT-5.5 Instant based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Kimi K3.1 Pro Highspeed | GPT-5.5 Instant |
|---|---|---|
| Provider | Venice AI | ZenMux |
| Input / 1M tokens | $6.00 | $5.00 |
| Output / 1M tokens | $30.00 | $30.00 |
| Context window | 1M | 400K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Oct 2026 | May 2026 |
| GPQA Diamond score | — | 82.5 |
| LMArena (Chatbot Arena) Elo score | — | 1419 |
| Epoch Capabilities Index score | — | 142 |
| LMArena Vision Elo score | — | 1250 |
FAQ
Is Kimi K3.1 Pro Highspeed or GPT-5.5 Instant cheaper?
Kimi K3.1 Pro Highspeed and GPT-5.5 Instant have comparable output pricing.
Which has the larger context window, Kimi K3.1 Pro Highspeed or GPT-5.5 Instant?
Kimi K3.1 Pro Highspeed has the larger context window (1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.