I had early access to GPT-5.5. It is very good, especially the Pro version. Full writeup very shortly.
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OpenAI announces GPT-5.5: smarter, faster AI model
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Hello GPT-5.5!
— Romain Huet (@romainhuet) 23 avril 2026
Our best model yet is here. It’s smarter, faster, and gets more done.
I had the chance to capture first reactions from developers building with it: it writes better code, understands more complex tasks, and keeps going.
Can’t wait to see what you build with it! pic.twitter.com/k1w60WZeaDHello GPT-5.5! Our best model yet is here. It’s smarter, faster, and gets more done. I had the chance to capture first reactions from developers building with it: it writes better code, understands more complex tasks, and keeps going. Can’t wait to see what you build with it!
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Smaller Token Count Improves Agentic Programming Model Performance
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Once again, in agentic programming itself the same pattern. The model achieves better performance using a smaller number of tokens.
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GPT 5.5 Rolls Out in Codex with 1.5x Speed Boost
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GPT 5.5 rolling out in Codex w/ 1.5x fast mode ✨ pic.twitter.com/a52wsW43G0
— Vaibhav (VB) Srivastav (@reach_vb) 23 avril 2026GPT 5.5 rolling out in Codex w/ 1.5x fast mode
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New AI Model Benchmarks: Opus Comparison and Performance Analysis
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In fact, scrolling down to the evaluation area, we see more benchmarks that would normally be up top, where in some cases Opus 4.7% outperforms the new model (forcing them to add a sympathetic footnote ). The model improves—without drastic jumps—in programming, office tasks,
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New Codex Features Coming Soon with Latest Model
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Also, a ton of new Codex features coming soon! Fun little bundle w/the new model.
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AI Agents, Code Security, and Product-Market Fit Evolution
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Is there such a thing as a stable product-market fit in the age of AI? 🤔
— Predibase by Rubrik (@predibase) 23 avril 2026
On this episode of Dev in the Details, Dev Rishi (GM of AI @RubrikInc) and Varun Badhwar (Founder of @EndorLabs) dive into how AI is evolving, keeping AI Agents and their code secure, and more 👉… pic.twitter.com/qo5HnAhUeQIs there such a thing as a stable product-market fit in the age of AI? On this episode of Dev in the Details, Dev Rishi (GM of AI @RubrikInc
) and Varun Badhwar (Founder of @EndorLabs
) dive into how AI is evolving, keeping AI Agents and their code secure, and more -
Pickle Version Mismatch Challenges in Model Deployment
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"code is solved" and yet I've spent a good chunk of my day trying to figure out pickle version mismatchings for a model upload. :/
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OpenAI Launches GPT-5.5 with Advanced Agentic Coding Capabilities
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Massive congrats to the team at @OpenAI 💚
— NVIDIA AI (@NVIDIAAI) 23 avril 2026
Moving the frontier forward isn’t easy, and GPT-5.5 does exactly that, with impressive performance across agentic coding, research tasks, and beyond. https://t.co/mGkM3VcPzqMassive congrats to the team at @OpenAI Moving the frontier forward isn’t easy, and GPT-5.5 does exactly that, with impressive performance across agentic coding, research tasks, and beyond.