Grok 4.5 vs Kimi K3
Cost and capability comparison. For a sample workload of 1,000 input and 500 output tokens across 100,000 requests/month, Grok 4.5 is cheaper by about $550.00/month.
| Grok 4.5 | Kimi K3 | |
|---|---|---|
| Provider | xai | moonshot |
| Input / 1M | $2.00 | $3.00 |
| Output / 1M | $6.00 | $15.00 |
| Per request (sample) | $0.00500 | $0.0105 |
| Monthly (sample) | $500.00 | $1,050.00 |
| Context window | 500,000 | 1,048,576 |
| Vision | Yes | No |
| Reasoning | Yes | Yes |
| Arena · Overall | 1451 | 1473 |
| Arena · Coding | 1550 | 1679 |
| Arena · Math & reasoning | 1445 | — |
| Arena · Agentic / tool use | 1420 | — |
Intelligence scores are community Arena ratings from LMArena / arena.ai, used under CC BY 4.0. Snapshot last refreshed 28 July 2026. Scores are a relative signal, not an absolute measure of capability. A Measured score was voted on directly; an Estimated score is inherited from an identical base model (a regional/creator-prefixed hosting duplicate). See our methodology.
Compare on your own workload
Grok 4.5 and Kimi K3 are pre-loaded. Adjust the tokens and monthly volume to see which is cheaper for your usage.
Used unless you set active users below.
Results update automatically as you type.
| Grok 4.5 | xAI | $0.00500 | $500.00 | $6,000.00 | 500,000 |
| Kimi K3 | Moonshot AI | $0.0105 | $1,050.00 | $12,600.00 | 1,048,576 |
FAQ
Which is cheaper, Grok 4.5 or Kimi K3?
For a workload of 1,000 input and 500 output tokens over 100,000 requests/month, Grok 4.5 is cheaper, costing about $500.00/month versus $1,050.00/month.
What is the context window of Grok 4.5 and Kimi K3?
Grok 4.5 supports 500,000 tokens, while Kimi K3 supports 1,048,576 tokens.
Estimates for planning only. Verify current pricing with each provider.