Claude Opus 5 vs Kimi K3.1 Pro Highspeed (Moonshot AI)
Kimi K3.1 Pro Highspeed (Moonshot AI) is cheaper on output tokens, while Kimi K3.1 Pro Highspeed (Moonshot AI) offers a larger context window. Choose Claude Opus 5 or Kimi K3.1 Pro Highspeed (Moonshot AI) based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Opus 5 | Kimi K3.1 Pro Highspeed (Moonshot AI) |
|---|---|---|
| Provider | Anthropic | LLM Gateway |
| Input / 1M tokens | $5.00 | $4.00 |
| Output / 1M tokens | $25.00 | $20.00 |
| Context window | 1M | 1M |
| Parameters | — | — |
| Open weights | — | No |
| Released | — | Oct 2026 |
| LMArena (Chatbot Arena) Elo score | 1509 | — |
| GPQA Diamond score | 93.9 | — |
| Epoch Capabilities Index score | 164 | — |
| LMArena WebDev Elo score | 1689 | — |
| LMArena Vision Elo score | 1320 | — |
FAQ
Is Claude Opus 5 or Kimi K3.1 Pro Highspeed (Moonshot AI) cheaper?
Kimi K3.1 Pro Highspeed (Moonshot AI) is cheaper on output tokens ($20.00 vs $25.00 per 1M).
Which has the larger context window, Claude Opus 5 or Kimi K3.1 Pro Highspeed (Moonshot AI)?
Kimi K3.1 Pro Highspeed (Moonshot AI) 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.