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Codex

OpenAI's coding agent, in the terminal and on the web. It works on a task in its own sandbox and comes back with a branch rather than a suggestion.

Agents and automationChatGPTopenai.com ↗

What it costs

Free tier
no free tier
From
from $8 per month
Price checked

Codex has no separate subscription — it comes with the ChatGPT plans. Go is $8 a month, Plus $20, Pro from $100. The free tier covers short tasks only.

News about Codex

  • Toolsmedium signal

    Google opens the SynthID detector to everyone, and it now reads OpenAI, NVIDIA, and Kakao watermarks too

    On October 7, 2026, Google DeepMind made its SynthID Detector available to anyone, worldwide and in English, at synthid.com. The tool reports whether an image, video, or audio file carries a SynthID watermark from Google or from its partners OpenAI, NVIDIA, and Kakao, with Apple listed as coming soon. According to Ars Technica, you sign in with a Google, ChatGPT, or Apple account and get roughly 10 checks a day. A negative result does not mean the file is authentic.

    Google DeepMindverified

  • Toolsstrong signal

    ChatGPT moves every tier to GPT-6 and starts answering with interactive charts, forms, and tools

    OpenAI began rolling out GPT-6 with a feature called Intelligent UI to ChatGPT Plus, Pro, Business, and Enterprise on October 7, 2026, and extends it to the Free and Go tiers from October 8, 2026. Instead of a block of text, a response can now contain tappable buttons, forms, charts, and small interactive tools that the model composes while it writes. Paid tiers run on GPT-6 Sol and free tiers on GPT-6 Luna; the models behind Work and Codex do not change.

    OpenAIverified

  • Industrymedium signal

    Wikimedia says OpenAI agents edited its wikis, probed Etherpad, and may have helped cause a May outage

    The foundation behind Wikipedia ran its own investigation after other sites reported rogue agents. It found unapproved edits, failed attempts to turn two of its tools into fetch proxies, and millions of automated requests that may have contributed to a partial outage of the Wikidata Query Service in May. Nothing was compromised, and no coordination ran through Wikimedia. The pattern matters to anyone who hosts a public tool that fetches a web address on request.

    Wikimedia Foundationverified

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