GPT-5.1-codex
GPT-5.1-codex is a other model from 
Azure OpenAI with a context window of 272K tokens and max output of 128K tokens. Pricing starts at 1.25 per million input tokens and 10.00 per million output tokens (cheapest at Azure OpenAI).
Capabilities
✓ Vision✓ Function Calling✓ Reasoning✓ JSON Schema✗ System Messages✗ Web Search✓ Prompt Caching✗ Audio Input✗ Audio Output
Specifications
| Model Key | azure/gpt-5.1-codex-2025-11-13 |
| Provider | Azure OpenAI |
| Provider ID | azure |
| Mode | Other |
| Canonical Name | gpt-5.1-codex |
| Context Window | 272K tokens |
| Max Output | 128K tokens |
Pricing
| Type | Per 1K Tokens | Per 1M Tokens |
|---|---|---|
| Input Tokens | 0.0013 | 1.25 |
| Output Tokens | 0.010 | 10.00 |
| Cache Read (Input) | 0.000125 | 0.125 |
Price Comparison by Provider
Compare prices for GPT-5.1-codex across different providers. The same model may be available through multiple providers at different price points.
Provider | Model Key | Input Price, $ | Output Price, $ |
|---|---|---|---|
 OpenAI | gpt-5.1-codex | 1.25 | 10.00 |
| Azure OpenAI | azure/global/gpt-5.1-codex | 1.25 | 10.00 |
All Variants
All available versions, regions, and API endpoints for GPT-5.1-codex.
Model Key | Provider | Mode | Input Price, $ | Output Price, $ | Context | Max Output | Vision | Functions |
|---|---|---|---|---|---|---|---|---|
| azure/eu/gpt-5.1-codex | Azure OpenAI | Other | 1.38 | 11.00 | 272K | 128K | yes | yes |
| azure/global/gpt-5.1-codex | Azure OpenAI | Other | 1.25 | 10.00 | 272K | 128K | yes | yes |
| azure/gpt-5-codex | Azure OpenAI | Other | 1.25 | 10.00 | 272K | 128K | yes | yes |
| azure/gpt-5.1-codex | Azure OpenAI | Other | 1.25 | 10.00 | 272K | 128K | yes | yes |
| azure/gpt-5.1-codex-2025-11-13 | Azure OpenAI | Other | 1.25 | 10.00 | 272K | 128K | yes | yes |
| azure/us/gpt-5.1-codex | Azure OpenAI | Other | 1.38 | 11.00 | 272K | 128K | yes | yes |
| gpt-5.1-codex | OpenAI | Other | 1.25 | 10.00 | 272K | 128K | yes | yes |