GPT-5.3 Codex is OpenAI's coding model built on GPT-5.3 and optimized for agentic coding tasks in Codex and similar environments. It takes text and image input and produces text output, with a 400K-token context window, up to 128K output tokens and low to xhigh reasoning effort.
Modalities
In / out price
$1.75 / $14.00per 1M
Cached price
$0.175per 1M
Context
400K
Max output
128K
Providers
1 routeCompare providers by price, privacy, and speed.
| Anonymous | $1.75 | $14.00 | $0.175 | 400K | 128K | — | — |
Privacy
1 / 4Anonymous routing
Anonymous tier
- Anonymous
- Private
- TEE
- E2EE
Your identity is hidden from the inference provider. The inference provider can see prompt content; zero retention is not guaranteed. Learn more
Features
8Streaming
Tool calling
Reasoning
Vision
JSON/schema
Web search
Code optimized
Prompt caching
Uptime
FAQ
Common questions about GPT-5.3 Codex.