Claude Sonnet 5 vs Kimi K3.1 Pro (Moonshot AI)
Both have similar output pricing, while Kimi K3.1 Pro (Moonshot AI) offers a larger context window. Choose Claude Sonnet 5 or Kimi K3.1 Pro (Moonshot AI) based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Sonnet 5 | Kimi K3.1 Pro (Moonshot AI) |
|---|---|---|
| Provider | Anthropic | LLM Gateway |
| Input / 1M tokens | $2.00 | $2.00 |
| Output / 1M tokens | $10.00 | $10.00 |
| Context window | 1M | 1M |
| Parameters | — | — |
| Open weights | — | No |
| Released | — | Oct 2026 |
| GPQA Diamond score | 90.5 | — |
| LMArena (Chatbot Arena) Elo score | 1442 | — |
| Epoch Capabilities Index score | 157 | — |
| LMArena WebDev Elo score | 1540 | — |
| LMArena Vision Elo score | 1273 | — |
FAQ
Is Claude Sonnet 5 or Kimi K3.1 Pro (Moonshot AI) cheaper?
Claude Sonnet 5 and Kimi K3.1 Pro (Moonshot AI) have comparable output pricing.
Which has the larger context window, Claude Sonnet 5 or Kimi K3.1 Pro (Moonshot AI)?
Kimi K3.1 Pro (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.