Kimi K3 vs o3
Cost and capability comparison. For a sample workload of 1,000 input and 500 output tokens across 100,000 requests/month, o3 is cheaper by about $450.00/month.
| Kimi K3 | o3 | |
|---|---|---|
| Provider | moonshot | openai |
| Input / 1M | $3.00 | $2.00 |
| Output / 1M | $15.00 | $8.00 |
| Per request (sample) | $0.0105 | $0.00600 |
| Monthly (sample) | $1,050.00 | $600.00 |
| Context window | 1,048,576 | 200,000 |
| Vision | No | Yes |
| Reasoning | Yes | Yes |
| Arena · Overall | 1473 | 1422 |
| Arena · Coding | 1679 | 1428 |
| Arena · Math & reasoning | — | 1435 |
| Arena · Agentic / tool use | — | 1410 |
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
Kimi K3 and o3 are pre-loaded. Adjust the tokens and monthly volume to see which is cheaper for your usage.
Used unless you set active users below.
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| o3 | OpenAI | $0.00600 | $600.00 | $7,200.00 | 200,000 |
| Kimi K3 | Moonshot AI | $0.0105 | $1,050.00 | $12,600.00 | 1,048,576 |
FAQ
Which is cheaper, Kimi K3 or o3?
For a workload of 1,000 input and 500 output tokens over 100,000 requests/month, o3 is cheaper, costing about $600.00/month versus $1,050.00/month.
What is the context window of Kimi K3 and o3?
Kimi K3 supports 1,048,576 tokens, while o3 supports 200,000 tokens.
Estimates for planning only. Verify current pricing with each provider.