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Mistral Medium 3 vs GPT-5.2 Codex
A detailed comparison of Mistral Medium 3 (Mistral) and GPT-5.2 Codex (OpenAI) across pricing, performance, and features.
Pricing Comparison
| Metric | Mistral Medium 3 | GPT-5.2 Codex | Difference |
|---|---|---|---|
| Input / 1M tokens | $0.40 | $1.75 | +338% |
| Output / 1M tokens | $2.00 | $14.00 | +600% |
| Context window | 128K | 200K | — |
| Max output | 16.384K | 65.536K | — |
Benchmark Comparison
| Benchmark | Mistral Medium 3 | GPT-5.2 Codex |
|---|---|---|
| MMLU-Pro | 76% | 89% |
| HumanEval | 87% | 95.5% |
| GPQA | — | 76% |
Capabilities
| Capability | Mistral Medium 3 | GPT-5.2 Codex |
|---|---|---|
| code | ✓ | ✓ |
| reasoning | ✗ | ✓ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✓ |
| vision | ✓ | ✓ |
Mistral Medium 3 Strengths
- ✓Very affordable for mid-tier quality
- ✓Good multilingual performance
Mistral Medium 3 Weaknesses
- ✗Lags behind on reasoning benchmarks
- ✗Smaller community and tooling
GPT-5.2 Codex Strengths
- ✓Strong coding performance
- ✓Available via API now
- ✓200K context window
GPT-5.2 Codex Weaknesses
- ✗Being superseded by 5.3
- ✗Higher output cost than some competitors
Quick Verdict
Best value: Mistral Medium 3 is the more affordable option at $0.4/$2 per 1M tokens.
Higher benchmarks: GPT-5.2 Codex scores higher on average across available benchmarks (86.8% avg).
Larger context: GPT-5.2 Codex supports 200K tokens.
Choose Mistral Medium 3 if cost matters most. Choose GPT-5.2 Codex if you need the best possible quality for complex tasks.