OpenRouter model
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...
- Provider
- OpenRouter
- Availability
- Available
- Model ID
- openai/gpt-5.3-codex
- Snapshot
- 2026-08-28
OpenAI: GPT-5.3-Codex model overview
OpenAI: GPT-5.3-Codex is listed in the public Swarm catalog through OpenRouter. This page summarizes the verified catalog fields used by Swarm without claiming real-time access for every provider account.
- Provider
- OpenRouter
- Family
- OpenRouter
- Context window
- 400K tokens
- Thinking support
- off · low · medium · high · xhigh
- Availability status
- Available
- Catalog ID
- openrouter/openai/gpt-5.3-codex
Public catalog snapshot. Catalog availability is not a real-time provider status or an access guarantee.