What this page answers
GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering t
- OpenAI · openai/gpt-5.1-codex
- text+image->text · global model route
- 400,000 context · $1.25 input
Before connecting
Do not stop at the model name. Before integration, verify base URL, protocol, visible models, parameters, and limits together.
- supports include_reasoning
- supports max_completion_tokens
- supports max_tokens
- supports reasoning
- supports response_format
Next action
The goal is to catch search demand, then move users into model profiles, provider profiles, and key checking.
- Check whether the model fits the use case
- Then verify key permission and callable models
