token.app › Compare › o3 Mini vs Kimi K3
o3 Mini vs Kimi K3
Kimi K3 leads on 4 of 4 shared benchmarks. o3 Mini is 3.1× cheaper per token on a blended 3:1 basis. Kimi K3 accepts the larger context window (1.0M).
Head to head
Blended price uses a 3:1 input:output mix
| o3 Mini | Kimi K3 | |
|---|---|---|
| Provider | OpenAI | Moonshot AI |
| Input $/1M | $1.10 | $3.00 |
| Output $/1M | $4.40 | $15.00 |
| Blended $/1M | $1.93 | $6.00 |
| Context window | 200K | 1.0M |
| Max output | 100K | — |
| Released | Jan 2025 | Jul 2026 |
| Licence | Proprietary | Open weights |
| GPQA Diamond | 77.0% | 93.1% |
| FrontierMath T1–3 | 18.6% | 72.2% |
| FrontierMath T4 | 0.0% | 39.0% |
| OTIS Mock AIME | 76.9% | 97.2% |
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose o3 Mini if…
- Costs less per token — $1.93 vs $6.00 blended
Choose Kimi K3 if…
- Higher GPQA Diamond (93.1% vs 77.0%)
- Higher FrontierMath T1–3 (72.2% vs 18.6%)
- Higher FrontierMath T4 (39.0% vs 0.0%)
- Higher OTIS Mock AIME (97.2% vs 76.9%)
- Larger context window (1.0M)
- Open weights — self-hostable
- Newer model (released Jul 2026)
FAQ
Which is better, o3 Mini or Kimi K3?
Across the 4 benchmarks both models have independently-run scores for, o3 Mini leads on 0 and Kimi K3 leads on 4. Benchmarks are one input — price and context window are on this page too.
Is o3 Mini cheaper than Kimi K3?
o3 Mini is cheaper: $1.93 versus $6.00 per million tokens blended at 3:1 input:output. Input alone: $1.10 vs $3.00. Output alone: $4.40 vs $15.00.
What context windows do o3 Mini and Kimi K3 have?
o3 Mini: 200,000 tokens. Kimi K3: 1,048,576 tokens.
Who makes o3 Mini and Kimi K3?
o3 Mini is made by OpenAI. Kimi K3 is made by Moonshot AI.