GPT 5.5 is officially here! Some powerful benchmark numbers, topping Claude Opus 4.7 on coding, reasoning, and math. OpenAI says it matches GPT-5.4 speed at half the cost of competing frontier coding models. The frontier moved back to OpenAI today (for now).
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API Pricing Announcement: $5 per Million Input Tokens
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API pricing will be $5 per 1 million input tokens and $30 per 1 million output tokens, with a 1 million context window. (Remember, you will need less tokens per task than 5.4!)
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GPT-5.5 Launch Marks Next AI Evolution Milestone
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We're watching AI evolve in real time. GPT-5.5 isn't just a launch – it's another proof point that the decade of intelligent systems is well underway.
— NVIDIA (@nvidia) 23 avril 2026
Congrats to the entire @OpenAI team on another impressive milestone. 🎉 https://t.co/xmYSJnK93GWe're watching AI evolve in real time. GPT-5.5 isn't just a launch – it's another proof point that the decade of intelligent systems is well underway. Congrats to the entire @OpenAI team on another impressive milestone.
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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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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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GPT-5.5 Released: New AI Model Available
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GPT-5.5 is here! We hope it's useful to you. I personally like it.
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New AI Model Launches Today: Faster, More Token-Efficient
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It is smart and fast; per-token speed matches 5.4 and it uses significantly fewer tokens per task. In my experience, it "gets what to do". Rolling out today in ChatGPT and Codex. We are working with API customers on security and safeguards and plan to launch in API very soon.