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 | In $/M | Out $/M | Context | Uptime |
|---|---|---|---|---|
| OpenAI | $1.75 | $14.00 | 400K | 99.9% |
| Azure | $1.75 | $14.00 | 400K | 100% |
GPT-5.3-Codex costs $1.75 per million input tokens and $14.00 per million output tokens via OpenRouter, making it 235th cheapest of 298 paid models.
GPT-5.3-Codex scores 53.6 on the Artificial Analysis Intelligence Index, ranking 9th of 178 benchmarked models, with a GPQA Diamond score of 92%.
GPT-5.3-Codex generates around 53 tokens per second with 4.2s time-to-first-token (p50), the 158th fastest tracked model.
GPT-5.3-Codex supports a 400K-token context window and can output up to 128K tokens. It accepts text, image, file input.