We’re excited to introduce GPT‑5.5, our smartest and most intuitive to use model yet, and the next step toward a new way of getting work done on a computer. GPT-5.5 is now available in the API, Codex, and ChatGPT. GPT‑5.5 understands what you’re trying to do faster and can carry more of the work itself. It also uses significantly fewer tokens to complete the same tasks, making it more efficient as well as more capable. To get the most out of GPT-5.5 in the API, check out our API prompt guide and migration guide, or use the command: [$openai-docs migrate this project to gpt-5.5] to kick off a plan to migrate your API integration via Codex.

‘Twas a dangerous cliff, as they freely confessed, though to walk near its crest was so pleasant; but over its terrible edge there had slipped a duke and full many a peasant. So the people said something would have to be done, but their projects did not at all tally; some said, “Put a fence round the edge of the cliff." Some, “An ambulance down in the valley.” But the cry for the ambulance carried the day. For it spread through the neighbouring city; A fence may be useful or not, it is true, but each heart became full of pity for those who slipped over the dangerous cliff; And the dwellers in highway and alley gave pounds and gave pence, not to put up a fence. But an ambulance down in the valley. “For the cliff is all right, if you’re careful,” they said. "And if folks even slip and are dropping, it isn’t the slipping that hurts them so much as the shock down below when they’re stopping.” So day after day, as these mishaps occurred, Quick forth would those rescuers sally To pick up the victims who fell off the cliff, with their ambulance down in the valley. Then an old sage remarked: “It’s a marvel to me that people give far more attention to repairing results than to stopping the cause when they’d much better aim at prevention. Let us stop at its source all this mischief, cried he. "Come, neighbours and friends, let us rally; If the cliff we will fence, we might almost dispense with the ambulance down in the valley.” "Oh, he’s a fanatic,” the others rejoined. "Dispense with the ambulance? Never! He’d dispense with all charities, too, if he could. No! No! We’ll support them forever. Aren’t we picking up folks just as fast as they fall? And shall this man dictate to us? Shall he? Why should people of sense stop to put up a fence while the ambulance works in the valley? But the sensible few, who are practical too, will not bear with such nonsense much longer. They believe that prevention is better than a cure. And their party will soon be the stronger. Encourage them then, with your purse, voice, and pen, and while other philanthropists dally, they will scorn all pretence and put up a stout fence on the cliff that hangs over the valley.

Welcome to the OpenAI developer update—your source for what’s shipping, how teams are building, and practical guidance straight from our engineers. Plan to get out of your IDE and into the real world? Keep an eye on our community page: a Codex Meetup might pop up near you soon What's new What shipped, what changed, what to automate next Build more powerful workflows with GPT-5.4, GPT-5.4 mini, GPT-5.4 nano Our most intelligent and efficient frontier model yet—built for professional work and long-horizon tasks—plus our most capable small models yet

MICROSOFT 🎨 Microsoft AI’s image model climbs leaderboards Image source: Microsoft The Rundown: Microsoft's AI Superintelligence team just released MAI-Image-2, a text-to-image model that landed at No. 5 on the Arena AI leaderboard — marking the strongest release yet for Mustafa Suleyman’s lab. The details: - Arena.ai ranked MAI-Image-2 at No. 5 overall, trailing just Gemini (several variants) and GPT Image-1.5 with strong upgrades in photorealism, 3D, and art. - The biggest jump from its predecessor came in text rendering, up 115 points, with drastically improved performance on posters, slides, and infographics. - MAI-Image-2 is free to try in Microsoft's MAI Playground for U.S. users, with Copilot, Bing, and API access on its Foundry platform rolling out soon. - The release comes amid Microsoft’s AI leadership shuffle, with Suleyman shifting away from Copilot to focus solely on frontier model work.

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