Kimi K3 vs Grok-4
Both have similar output pricing, while Kimi K3 offers a larger context window. Choose Kimi K3 or Grok-4 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Kimi K3 | Grok-4 |
|---|---|---|
| Provider | MoonshotAI | Poe |
| Input / 1M tokens | $0.45 | $3.00 |
| Output / 1M tokens | $15.00 | $15.00 |
| Context window | 1M | 256K |
| Parameters | — | 3T |
| Open weights | — | No |
| Released | — | Jul 2025 |
| LMArena (Chatbot Arena) Elo score | 1476 | 1411 |
| LMArena WebDev Elo score | 1655 | — |
| Epoch Capabilities Index score | 157 | 146 |
| GPQA Diamond score | 93.1 | 87.0 |
| Aider Polyglot score | — | 79.6 |
| LMArena Vision Elo score | — | 1210 |
| FrontierMath score | — | 19.7 |
FAQ
Is Kimi K3 or Grok-4 cheaper?
Kimi K3 and Grok-4 have comparable output pricing.
Which has the larger context window, Kimi K3 or Grok-4?
Kimi K3 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.