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,
RESEARCH
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GPT-5.5 Iterative Deployment Strategy for AI Safety
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1. We believe in iterative deployment; although GPT-5.5 is already a smart model, we expect rapid improvements. Iterative deployment is a big part of our safety strategy; we believe the world will be best equipped to win at the team sport of AI resilience this way. 2. We believe
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Sarcomere Enhancers Show Promise for HFpEF Obesity Treatment
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In people with HFpEF (heart failure with preserved ejection fraction) and severe obesity, there is a heart muscle cell defect with sarcomere hyper-phosphorylation. Besides weight loss, sarcomere enhancers (not yet studied) may help. @ScienceMagazine https://
science.org/doi/10.1126/sc
ience.adz7118
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GPT-5.5 Achieves Breakthrough in Long-Running Task Reliability
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GPT-5.5 is MUCH more reliable on longer running tasks – for the first time with any model.
— Peter Gostev (@petergostev) 23 avril 2026
As we speak I have a migration running for over 7+ hours – this literally never happened before, the models would maybe run for 30 mins or of you really shout at them for 2-3 hours.… pic.twitter.com/nxdrKZnOzWGPT-5.5 is MUCH more reliable on longer running tasks – for the first time with any model. As we speak I have a migration running for over 7+ hours – this literally never happened before, the models would maybe run for 30 mins or of you really shout at them for 2-3 hours.
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Pareto Frontiers: Extended Context and Improved Inference Speed
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looks like new Pareto frontiers across everything:
— swyx 🇸🇬 (@swyx) 23 avril 2026
– Context: 400K context in Codex and a 1M in API
– API Pricing: $5/m input and $30/m output tokens.
– Codex improved its own inference speed 20% lol
– First generation co-designed with GB200 and GB300 NVL72
– 82.7% on… https://t.co/J5CL5fKmsq pic.twitter.com/nJG1vubSdNlooks like new Pareto frontiers across everything: – Context: 400K context in Codex and a 1M in API
– API Pricing: $5/m input and $30/m output tokens. – Codex improved its own inference speed 20% lol – First generation co-designed with GB200 and GB300 NVL72 – 82.7% on -
GPT 5.5: Incremental Progress, Not Mythical Leap Forward
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Taking a look at the benchmarks that head the article, one thing becomes clear: it's not a Mythos-level model. It simply follows the continuationist saga we've seen with GPT 5.1, GPT 5.2, GPT 5.4 and now GPT 5.5 So a priori, only the jump in FrontierMath Tier 4 gets me excited
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Vision Banana: Rethinking AI Model Generalization in Vision
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Vision Banana: Rethinking How AI Models See and Generalize
— Satya Mallick (@LearnOpenCV) 23 avril 2026
In this episode of Artificial Intelligence: Papers and Concepts, we explore Vision Banana, a concept that challenges how vision models learn and generalize from visual data. Instead of focusing purely on performance… pic.twitter.com/vgp0LQbMFiVision Banana: Rethinking How AI Models See and Generalize In this episode of Artificial Intelligence: Papers and Concepts, we explore Vision Banana, a concept that challenges how vision models learn and generalize from visual data. Instead of focusing purely on performance
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OpenAI Launches GPT-5.5 Thinking and Pro Models
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LETS GOOOO! Excited to introduce GPT-5.5 Thinking & Pro in ChatGPT and Codex It's our smartest model *yet* for real work: stronger agentic coding, computer use, knowledge work, long-context reasoning, and scientific research It can plan, use tools, check its work, recover
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How Anthropic’s Product Team Ships Faster Than Anyone
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How Anthropic’s product team moves faster than anyone else I sat down with @_catwu
, Head of Product for Claude Code at @AnthropicAI
, to get a peek into their unprecedented shipping pace, how AI is changing the PM role, and how to be the right amount of AGI-pilled. We discuss: -
OpenAI Announces GPT 5.5 Flagship Model Features
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OPENAI ANNOUNCES GPT 5.5! OpenAI's new flagship model is here already, let's break down the new features bit by bit. Inside thread