All Models
GPT 5.3 Codex (Fast)
Coding-optimized GPT model for repository edits, reviews, and agentic software work
Available Providers (1)
| Provider | Model ID | Input Cost | Output Cost | Context | Max Output | Docs |
|---|---|---|---|---|---|---|
 Vercel AI Gateway | openai/gpt-5.3-codex-fast | $3.50/MTok | $28/MTok | 400K | 128K |
Capabilities
Reasoning
Tool Calling
Attachments
Open Weights
Structured Output