All Models
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...
Benchmarks
Available Providers (16)
| Provider | Model ID | Input Cost | Output Cost | Context | Max Output | Docs |
|---|---|---|---|---|---|---|
 GitHub Copilot | gpt-5.3-codex | $0.00/MTok | $0.00/MTok | 400K | 128K | |
 Poe | openai/gpt-5.3-codex | $1.60/MTok | $13.00/MTok | 400K | 128K | |
 Abacus | gpt-5.3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 OpenRouter | openai/gpt-5.3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 ZenMux | openai/gpt-5.3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 Vivgrid | gpt-5.3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 Cloudflare AI Gateway | openai/gpt-5.3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 OpenCode Zen | gpt-5.3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 Firmware | gpt-5-3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 Azure Cognitive Services | gpt-5.3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 OpenAI | gpt-5.3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 Requesty | openai/gpt-5.3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 Vercel AI Gateway | openai/gpt-5.3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 LLM Gateway | gpt-5.3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 Azure | gpt-5.3-codex | $1.75/MTok | $14.00/MTok | 400K | 128K | |
 Venice AI | openai-gpt-53-codex | $2.19/MTok | $17.50/MTok | 400K | 128K |
Capabilities
Reasoning
Tool Calling
Attachments
Open Weights
Structured Output