GPT-5.1 vs GPT-5.1-Codex-Max
A side-by-side comparison of two multimodal models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
GPT-5.1 vs GPT-5.1-Codex-Max: side by side
| Spec | GPT-5.1 | GPT-5.1-Codex-Max | Winner |
|---|---|---|---|
| Intelligence | 27.4 | — | Tie |
| Output speed | 116 t/s | — | Tie |
| Output price | $10.00/1M | $10.00/1M | Tie |
| Context | 400K | 400K | Tie |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | OpenAI | OpenAI | Tie |
GPT-5.1
Pros
- +Very large context window
- +Native support for images, text, and files
- +Strong multimodal integration
Cons
- –No audio or video modalities
- –Performance details unverified beyond specs
- –Potential latency with maximum context
GPT-5.1-Codex-Max
Pros
- +Handles very large contexts
- +Strong coding focus
- +Combines text and image inputs
- +Suitable for complex technical workflows
Cons
- –Limited to text and image modalities
- –High resource demands for large contexts
- –No support for other media types
Frequently asked questions
It depends on your needs. GPT-5.1 and GPT-5.1-Codex-Max are both multimodal models; the comparison table above shows where each one leads on the metrics that matter. See the verdict for a recommendation.