Tag: codex

OpenAI releases GPT-5.3-Codex, faster and more capable

The new coding model is 25% faster — letting it do long-running tasks in a shorter time frame.

It’s the first OpenAI model that was built with itself. They used early versions of it to debug, manage deployment and diagnose test results, and say they were impressed with its capabilities.

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OpenAI’s Codex suite gets a macOS app

For your discerning coding needs, you are no longer tied to the Codex web interface or terminal window, and can now vibe code on your own macOS app. Windows support is «comining soon.”

The app supports multitasking agents, creating and using skills, and automations.

Read more about it and get the app here.

To celebrate the launch, Codex is now available for Free and Go tiers, and paid plans get double the usage limits for «a limited time.»

Anthropic and OpenAI are doubling usage limits until New Year’s

The most popular AI coding platforms are joining in doubling limits this Christmas. (Picture: Adobe)
From Christmas Eve til New Years Eve, you can do a lot of extra coding with Claude and Codex.

Anthropic started the party with Claude, offering Pro and Max users twice the usual limits to close out the year:

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OpenAI introduces GPT-5.1-Codex-Max, defeating Gemini 3 on some benches

Codex-Max reaches parity with Gemini 3, just a day after launch. (Picture: Screenshot, OpenAI)
OpenAI’s new coding model outperforms «state of the art» Gemini 3 from just yesterday, in some select benchmarks — and seems to be on par at SWE-Bench Verified.

— GPT‑5.1-Codex-Max is faster, more intelligent, and more token-efficient at every stage of the development cycle–and a new step towards becoming a reliable coding partner, says OpenAI in their launch post.

It has been observed by the AI lab to work independently on tasks for more than 24 hours, iterating on its implementations and delivering a «successful result.»

Codex-Max is also the first OpenAI model trained in a Windows environment, and will achieve better performance than the previous GPT-5.1-Codex using 30% fewer tokens — meaning it’s cheaper and more efficient.

Read more: The launch post, VentureBeat. Discussion on r/Singularity.

OpenAI announces GPT-5 Codex

GPT-5 Codex is slightly better than vanilla GPT-5 in benchmarks.
OpenAI is especially proud of the code review function in the new Codex. (Picture: OpenAI)
Savvy users have been using GPT-5-high with the Codex CLI (Command Line Interface) on their terminals for weeks, and consensus seems to be that it competes well with Claude.

Now, OpenAI is launching a custom, optimized version of GPT-5 for the Codex coding agent that they say is faster, more reliable and more steerable than before.

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OpenAI’s Codex now available to ChatGPT Plus users

ChatGPT Plus-tier gets access to Codex!
Wider availability for Codex likely means even more pressure on the coding market. (Picture: Chatgpt.com)
Caught this morning, there seems to be a new option in the sidebar at Chatgpt.com for the new Codex coding model — meaning it has expanded access.

Codex is the latest coding agent from OpenAI that runs on a modified o3-model.

Super-coding agent
It can generate several instances of code from your prompts, and even run them in a sandbox to select the best/most efficient version.

OpenAI says it can complete tasks autonomously that would otherwise take hours or days to finish, and they are using it themselves to offload repetitive tasks.

The Plus membership for ChatGPT is $20 a month, and Codex launched as a «research preview» in May for Pro users, who fork out $200 a month.

Update: It appears Codex now also has Internet acccess, which is off by default and comes with a stern warning.

See also: teknotum on the Codex launch, and the announcement thread on X.

OpenAI debuts Codex, an AI coding agent, further disrupting the software industry

Codex can run your code multiple times until it finds the best version.
Codex can run your code multiple times until til finds the best version. (Picture: OpenAI)
In a world where 30% of Big Tech code is written by AI already, OpenAI says it wants to join the club for «virtual teammates,» and it’s getting ever closer with today’s launch.

OpenAI’s Agents Research Lead, Josh Tobin tells TechCrunch that the company wants software agents to complete tasks autonomously that would otherwise take hours or days to finish, in anything from one to thirty minutes, and OpenAI is already using the model to offload repetitive tasks.

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