Devstral 2 2512 vs GPT-5 Codex
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Devstral 2 2512 and GPT-5 Codex.
Devstral 2 2512
Devstral 2 is a state-of-the-art open-source model by Mistral AI specializing in agentic coding. It is a 123B-parameter dense transformer model supporting a 256K context window. Devstral 2 supports exploring...
GPT-5 Codex
GPT-5-Codex is a specialized version of GPT-5 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
Technical Specifications
| Specification | Devstral 2 2512 | GPT-5 Codex |
|---|---|---|
| Provider | Mistral | OpenAI |
| Context Window | 262,144 tokens | 400,000 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | self hostable | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2025-12-09 | 2025-09-23 |
API Pricing Comparison
Input Price per Million Tokens
Devstral 2 2512
$0.40
GPT-5 Codex
$1.25
Output Price per Million Tokens
Devstral 2 2512
$2.00
GPT-5 Codex
$10.00
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Devstral 2 2512 Quirks & Gotchas
No developer gotchas reported.
GPT-5 Codex Quirks & Gotchas
No developer gotchas reported.