Our most intelligent coding model optimized for long-horizon, agentic coding tasks.
Our most intelligent coding model optimized for long-horizon, agentic coding tasks.
GPT-5.2-Codex is an upgraded version of GPT-5.2 optimized for agentic coding tasks in Codex or similar environments.
GPT-5.2-Codex supports low, medium, high, and xhigh reasoning effort settings.
If you want to learn more about prompting GPT-5.2-Codex, refer to our dedicated guide.
128,000
max output tokens
Aug 31, 2025 knowledge cutoff
Pricing
Pricing is based on the number of tokens used, or other metrics based on the model type. For tool-specific models, like search and computer use, there’s a fee per tool call. See details in the
Endpoints
Chat Completions
v1/chat/completions
Fine-tuning
v1/fine-tuning
Image generation
v1/images/generations
Image edit
v1/images/edits
Speech generation
v1/audio/speech
Transcription
v1/audio/transcriptions
Translation
v1/audio/translations
Completions (legacy)
v1/completions
Features
Function calling
Supported
Structured outputs
Supported
Distillation
Not supported
Predicted outputs
Not supported
Snapshots
Snapshots let you lock in a specific version of the model so that performance and behavior remain consistent. Below is a list of all available snapshots and aliases for
GPT-5.2-Codex
.
Rate limits
Rate limits ensure fair and reliable access to the API by placing specific caps on requests or tokens used within a given time period. Your usage tier determines how high these limits are set and automatically increases as you send more requests and spend more on the API.
| Tier | RPM | TPM | Batch queue limit |
|---|---|---|---|
| Free | Not supported | ||
| Tier 1 | 500 | 500,000 | 1,500,000 |
| Tier 2 | 5,000 | 1,000,000 | 3,000,000 |
| Tier 3 | 5,000 | 2,000,000 | 100,000,000 |
| Tier 4 | 10,000 | 4,000,000 | 200,000,000 |
| Tier 5 | 15,000 | 40,000,000 | 15,000,000,000 |