OpenAI
OpenAI Codex
Access OpenAI Codex API with GPT-5, 5.1, 5.2, and GPT-5.3 Codex models. Generate code, debug complex systems, and handle long-context engineering tasks with scalable performance on UniRoute.
Pricing
| Billing unit | UniRoute | Market |
|---|---|---|
| Input | $0.50 | $1.25 |
| Output | $4.00 | $10.00 |
per 1M tokens
About this model
GPT-5 Codex API provides stable code generation for everyday development tasks. It balances reasoning and speed, making it suitable for prototyping, structured implementation, and general engineering workflows.
Deep dive
GPT-5 Codex API for Reliable Coding Foundations
GPT-5 Codex API provides stable code generation for everyday development tasks. It balances reasoning and speed, making it suitable for prototyping, structured implementation, and general engineering workflows.
GPT-5.1 Codex API for More Consistent Output
GPT-5.1 Codex API improves instruction adherence and output stability. Developers benefit from more predictable results, cleaner structure, and fewer revisions when working on structured coding tasks.
GPT-5.2 Codex API for Deeper Debugging and Context
GPT-5.2 Codex API enhances reasoning depth and long-context handling. It performs better across multi-file systems, complex debugging scenarios, and iterative patch refinement in mid-to-large repositories.
Call it with one request
Works with the OpenAI SDK — just change the base URL.
curl https://api.uniroute.dev/v1/chat/completions \
-H "Authorization: Bearer $UNIROUTE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "codex",
"messages": [{ "role": "user", "content": "Hello!" }],
"stream": true
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