GPT-5.1-Codex-Max
OpenAI · Multimodal · Released Dec 2025
OpenAI's coding-specialized model from the GPT-5.1 generation with a 400k token context window, released before the December 2025 GPT-5.2 generation.
- Strengths
- Handles extended code repositories and complex software engineering tasks across large files and dependency chains.
- Best for
- Software development workflows that require reasoning over substantial codebases or multi-file projects within a single request.
- Limitations
- Superseded by GPT-5.2-Codex from the newer generation; general-purpose reasoning tasks are better served by GPT-5.1 or GPT-5.2.
Input / 1M
$1.25
Output / 1M
$10.00
Cached input / 1M
$0.125
Context window
400K
Price history
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 11 Jun 2026 | $1.25 | $10.00 | $0.125 | Imported from OpenRouter | openrouter.ai |