# Introducing GPT-5.3-Codex

DevFeed: [Introducing GPT-5.3-Codex](<https://devfeed.tech/articles/introducing-gpt-5-3-codex-6490.md>)

Original publisher: [Read original article](<https://openai.com/index/introducing-gpt-5-3-codex>)

Published: 2026-02-05T00:00:00Z

Content type: release

Language: en

Sources: [OpenAI News](<https://devfeed.tech/sources/openai-news.md>)

Topics: [codex](<https://devfeed.tech/topics/codex.md>), [agentic-coding](<https://devfeed.tech/topics/agentic-coding.md>), [coding](<https://devfeed.tech/topics/coding.md>), [Software Engineering](<https://devfeed.tech/topics/software-engineering.md>), [Command-line interface](<https://devfeed.tech/topics/cli.md>), [Web Development](<https://devfeed.tech/topics/web-development.md>)

Tags: [agent](<https://devfeed.tech/tags/agent.md>), [agentic-coding](<https://devfeed.tech/tags/agentic-coding.md>), [code](<https://devfeed.tech/tags/code.md>), [codex](<https://devfeed.tech/tags/codex.md>), [developers](<https://devfeed.tech/tags/developers.md>), [evaluation](<https://devfeed.tech/tags/evaluation.md>), [gpt](<https://devfeed.tech/tags/gpt.md>), [product](<https://devfeed.tech/tags/product.md>), [terminal](<https://devfeed.tech/tags/terminal.md>), [web-development](<https://devfeed.tech/tags/web-development.md>)

## AI overview

OpenAI introduces GPT-5.3-Codex, a faster Codex-native agentic coding model that combines advanced coding performance with reasoning and professional knowledge. The article highlights long-running research, tool-use, coding, deployment, debugging, evaluation, terminal, and web-development capabilities, along with strong benchmark results and autonomous game-building examples.

## Source excerpt

GPT-5.3-Codex is a Codex-native agent that pairs frontier coding performance with general reasoning to support long-horizon, real-world technical work.