gpt-5.3-codex

gpt-5.3-codex is OpenAI’s Codex model identifier for agent-based software engineering. The official model catalog uses the Codex family for long-chain coding tasks, such as understanding the code base, planning changes, editing multiple files, running tests, troubleshooting errors, and calling development tools. It is suitable for assisting R&D work under clear warehouse scope, test standards and change constraints. When calling, the project structure, language version, dependencies, tools allowed to be accessed, and unmodifiable areas should be provided, and the generated changes should be placed under version control, automated testing, and security review.

Context

400000 tokens

Max output

128000 tokens

Input

llm image

Output

llm