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
AI
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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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Usage Limits Reset for AI Service Subscribers
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We’re resetting usage limits for subscribers. Thank you so much for your feedback and patience!
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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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Complex Investigation Reveals Root Causes and System Confounders
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We take these reports incredibly seriously. In my time on the team, this has probably been the most complex investigation we’ve had. The root causes were not obvious, and there were many confounders.
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Claude Code Quality Issues: Post-Mortem Analysis Published
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We’ve been looking into recent reports around Claude Code quality issues, and just published a post-mortem on what we found.
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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