OpenAI
GPT-5.3 Codex
Coding-optimized GPT model for repository edits, reviews, and agentic software work
Model facts
- Context window
- 4K tokens
- Maximum output
- 128K tokens
- Cheapest paid input
- $1.6 per 1M tokens
- Cheapest paid output
- $13 per 1M tokens
- Open weights
- no
- Providers
- 33
Capabilities and modalities
reasoning, tool calling, structured output, attachments, temperature control, text, image, pdf.
Artificial Analysis benchmarks
Compare this model on the full LLM benchmark leaderboard.
| Configuration | AAI | Coding | Math | Output tokens/s |
|---|---|---|---|---|
| xhigh | 45.5 | not measured | not measured | 126.0 |
Observed price history
- 2026-08-24: $1.57 input / $12.6 output per 1M tokens
- 2026-08-28: $1.6 input / $13 output per 1M tokens
API providers
- GitLab Duo (Agentic Chat) — model id duo-chat-gpt-5-3-codex; free input / free output per 1M tokens; provider documentation
- Poe — model id openai/gpt-5.3-codex; $1.6 input / $13 output per 1M tokens; provider documentation
- AIHubMix — model id gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Abacus — model id gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Azure — model id gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Azure Cognitive Services — model id gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- DevPass (LLM Gateway) — model id gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- DigitalOcean (OpenAI) — model id openai-gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Eden AI — model id openai/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- FastRouter — model id openai/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- FreeModel — model id gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- FrogBot — model id gpt-5-3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- GitHub Copilot — model id gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Impossibl — model id openai/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Kilo Gateway — model id openai/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- LLM Gateway (Azure) — model id azure/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- LLM Gateway (OpenAI) — model id openai/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- NanoGPT — model id openai/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Neon — model id gpt-5-3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Ofox — model id openai/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- OpenAI — model id gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- OpenCode Zen — model id gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- OpenRouter — model id openai/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Opper — model id openai/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- OrcaRouter — model id openai/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Pioneer — model id gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Requesty — model id gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Vercel AI Gateway — model id openai/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Vivgrid — model id gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- ZenMux — model id openai/gpt-5.3-codex; $1.75 input / $14 output per 1M tokens; provider documentation
- Venice AI — model id openai-gpt-53-codex; $2.19 input / $17.5 output per 1M tokens; provider documentation
- Vercel AI Gateway — model id openai/gpt-5.3-codex-fast; $3.5 input / $28 output per 1M tokens; provider documentation
- Arena — model id gpt-5.3-codex; not published input / not published output per 1M tokens; provider documentation