← All models
OpenAI: GPT-5.3-Codex
openai/gpt-5.3-codex
VisionTool useJSONReasoningStreaming
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...
Pricing
Input
$1.75 / 1M
Output
$14.00 / 1M
Specs
Context
400,000 tokens
Input
text, image, file
Output
text
Released: 2026-02
Supported parameters
include_reasoningmax_completion_tokensmax_tokensreasoningresponse_formatseedstructured_outputstool_choicetools