GPT-5.5 delivers this step up in intelligence without compromising on speed. GPT-5.5 matches GPT-5.4 per-token latency in real-world serving, while performing better across nearly every evaluation we measured. It also uses significantly fewer tokens to complete the same Codex
LLMS
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GPT-5.5 Pro: Faster, More Capable AI
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In ChatGPT, full-stack inference improvements enable a more capable model at faster speed. This efficiency is a game-changer for GPT-5.5 Pro, now a much more practical option for demanding tasks, and a step change in the level of difficulty and quality of work ChatGPT can take on
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GPT-5.5: New AI for Work and Agents
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Introducing GPT-5.5
— OpenAI (@OpenAI) 23 avril 2026
A new class of intelligence for real work and powering agents, built to understand complex goals, use tools, check its work, and carry more tasks through to completion. It marks a new way of getting computer work done.
Now available in ChatGPT and Codex. pic.twitter.com/rPLTk99ZH5Introducing GPT-5.5 A new class of intelligence for real work and powering agents, built to understand complex goals, use tools, check its work, and carry more tasks through to completion. It marks a new way of getting computer work done. Now available in ChatGPT and Codex.
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GPT-5.5 Advances in Coding and Knowledge Work
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GPT-5.5 excels at writing and debugging code, researching online, analyzing data, creating documents and spreadsheets, operating software, and moving across tools until a task is finished. The gains are especially clear in agentic coding, computer use, knowledge work, and early
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Anthropic Addresses Opus 4.7 Issues in Claude Code
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Separately, we’ve also heard reports of issues with Opus 4.7 in Claude Code. The team is working on those and we’ll share more as we roll out improvements over the coming days.
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GPT-5.5 Review: Massive Leap Forward but Major Regression
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I’ve been using GPT-5.5 for the last few weeks. It’s a MASSIVE leap forward. But the weird thing is: for 99% of users, it probably won’t matter. And there's one BIG, incredibly frustrating regression. Read more in my review:
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GPT-5.5 Released: Major AI Model Update
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LIVE VIBE CHECK: GPT-5.5 IS OUT https://t.co/aRU3yIisRw
— Dan Shipper 📧 (@danshipper) 23 avril 2026LIVE VIBE CHECK: GPT-5.5 IS OUT
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GPT-5.5 Spud Launches: Major Leap in Coding and AI
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BREAKING:
— Dan Shipper 📧 (@danshipper) 23 avril 2026
GPT-5.5 "Spud" is out and it is a BEAST
We've been testing it @every for the last 3 weeks on everything from coding, to writing, to knowledge work. Here's our day 0 vibe check:
– It's a step change in coding AND it's easy to talk to. It's fast and friendly and… pic.twitter.com/lMl2wdwADbBREAKING: GPT-5.5 "Spud" is out and it is a BEAST We've been testing it @every for the last 3 weeks on everything from coding, to writing, to knowledge work. Here's our day 0 vibe check: – It's a step change in coding AND it's easy to talk to. It's fast and friendly and
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LLM Emotions as Performance: Beyond Origin and Purpose
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It's an excellent analogy. In the same way that flying is not defined by its origin or purpose but by a performance, feelings are a performance. The author's argument is bad, regardless of whether LLMs have emotions.
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ChatGPT Pro vs. Thinking: Image quality comparison and model distinctions
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Ran with latest ChatGPT Pro with Extended mode. I believe the final model (ChatGPT Images 2.0) is distinct. It seems clear to me you get better images with Pro than Thinking, but the details of how they work together isn’t fully explained anywhere AFAIK.