# OpenAI: GPT-5.3-Codex

Provider: openai  
Category: llm  
Model ID: `openai/gpt-5.3-codex`

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...

## Specs

- Context length: 400000 tokens
- Max output: 128000 tokens
- Modalities: text, image, file
- Released: 2026-02-24

## Pricing

- Input: $1.75 per million tokens
- Output: $14.00 per million tokens

## Providers

- **openai** — ctx 400000, input $1.75/M, output $14.00/M

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Last verified: 2026-04-23T23:46:29.618Z  
Canonical URL: https://switchy.build/models/gpt-5-3-codex