Devstral 2 vs GPT-5.3-Codex
Devstral 2 leads in 4 of 8 categories
Arena ELO
Tie
Cheaper
Devstral 2
Faster
Devstral 2
Detailed Comparison
| Category | Devstral 2 | GPT-5.3-Codex |
|---|---|---|
| Provider | Mistral | OpenAI |
| Context Window | 256K WIN | 128K |
| Input Price ($/1M) | $0.05 WIN | $1.75 |
| Output Price ($/1M) | $0.22 WIN | $14 |
| Arena ELO | N/A | N/A |
| Coding | unknown | N/A |
| Reasoning | unknown | N/A |
| Speed (tokens/sec) | ~100 t/s WIN | N/A |
| Open Source | Yes | No |
Frequently Asked Questions
Which is cheaper, Devstral 2 or GPT-5.3-Codex?
Devstral 2 is approximately 98% cheaper than GPT-5.3-Codex per million tokens.
Which is better for coding, Devstral 2 or GPT-5.3-Codex?
Devstral 2 scores unknown on coding benchmarks, while GPT-5.3-Codex scores N/A.
Which has a larger context window?
Devstral 2 supports 256K context, while GPT-5.3-Codex supports 128K.
Is Devstral 2 or GPT-5.3-Codex open source?
Devstral 2 is open source. GPT-5.3-Codex is proprietary.
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