GPT-5.1-Codex-Mini vs GPT-5 Pro
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.
Quick verdict: which should you choose?
Choose GPT-5.1-Codex-Mini if you need
- ✓Choose GPT-5.1-Codex-Mini if you need strong coding specialization with native image+text support and very large context.
- ✓Choose GPT-5.1-Codex-Mini if you need fast output at 212.57 t/s and low cost of $2 per million tokens.
- ✓Choose GPT-5.1-Codex-Mini if you need extended technical workflows where a known intelligence index of 30.6 is acceptable.
- ✓Choose GPT-5.1-Codex-Mini if you need to avoid high computational costs associated with maximum context usage.
Choose GPT-5 Pro if you need
- ✓Choose GPT-5 Pro if you need strong integration of text, image, and file data for document-heavy workflows.
- ✓Choose GPT-5 Pro if you need flexible reasoning over extended context across multiple modalities including files.
- ✓Choose GPT-5 Pro if you need to handle very large inputs without specialization limits to coding tasks.
- ✓Choose GPT-5 Pro if you need broader modality support beyond image and text only.
Verdict
GPT-5.1-Codex-Mini leads on cost-efficiency, output speed, and coding specialization with a known intelligence index of 30.6, while GPT-5 Pro offers broader multimodal file handling and flexible reasoning over large inputs at a much higher price. Both share identical 400k context windows, but A provides concrete speed (212.57 t/s) and pricing ($2/1M) advantages absent from B's specs. GPT-5 Pro suits document-heavy multimodal workflows where cost and speed are secondary.
GPT-5.1-Codex-Mini vs GPT-5 Pro: side by side
| Spec | GPT-5.1-Codex-Mini | GPT-5 Pro | Winner |
|---|---|---|---|
| Intelligence | 30.6 | — | Tie |
| Output speed | 211 t/s | — | Tie |
| Output price | $2.00/1M | $120.00/1M | GPT-5.1-Codex-Mini |
| Context | 400K | 400K | Tie |
| Params | — | — | Tie |
| Provider | OpenAI | OpenAI | Tie |
Detailed analysis
Pricing
Winner: GPT-5.1-Codex-MiniGPT-5.1-Codex-Mini costs $2 per million tokens compared to GPT-5 Pro at $120 per million tokens. This creates a 60x price difference favoring A for high-volume use. Both share the same 400k context but A avoids the higher computational cost noted for B.
Speed and Context
Winner: GPT-5.1-Codex-MiniGPT-5.1-Codex-Mini reports output speed of 212.57 t/s while GPT-5 Pro has no speed data provided. Both models have identical 400k context windows. A's limitation notes a trade-off between context size and response speed that is quantifiable unlike B.
Multimodal Capabilities
Winner: GPT-5 ProGPT-5 Pro supports text, image, and file data integration for document-heavy tasks. GPT-5.1-Codex-Mini is limited to image and text modalities with coding focus. B's strengths emphasize handling very large inputs across more modalities than A's native image+text support.
Specialization and Intelligence
Winner: GPT-5.1-Codex-MiniGPT-5.1-Codex-Mini provides a concrete intelligence index of 30.6 and strong coding specialization. GPT-5 Pro has unknown intelligence index and varies on highly specialized topics. A's limitations acknowledge possible reduced depth on complex reasoning versus B's flexible reasoning claim.
GPT-5.1-Codex-Mini
Pros
- +Very large context window
- +Strong coding specialization
- +Native image + text support
Cons
- –Mini variant may have reduced depth on complex reasoning
- –Limited to image and text modalities
- –Trade-off between context size and response speed
GPT-5 Pro
Pros
- +Handles very large inputs across modalities
- +Strong integration of text, image, and file data
- +Suitable for document-heavy workflows
Cons
- –No native real-time information access
- –Performance can vary on highly specialized topics
- –Higher computational cost with maximum context
Summary: GPT-5.1-Codex-Mini vs GPT-5 Pro
Select GPT-5.1-Codex-Mini for coding-focused multimodal work needing speed, low cost, and known metrics. Choose GPT-5 Pro when file-inclusive multimodal integration and broader input handling outweigh the steep price increase. Both deliver 400k context but target different workflow priorities.
Frequently asked questions
GPT-5.1-Codex-Mini is better for coding and cost-sensitive tasks with measurable speed and intelligence; GPT-5 Pro is better for file-inclusive multimodal document workflows.