That said, let's tackle it not from the hype perspective that OpenAI and others have been hyping up in recent weeks with the damn potato and let's analyze it as a new model. For me, GPT 5.4 has been an excellent model, and if this one improves it and fixes its weak points, it
LLMS
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GPT 5.5 achieves SOTA performance with lower output tokens
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it's pretty insane how token efficient GPT 5.5 – SOTA performance all with significantly lower output tokens!!
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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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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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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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GPT-5.5 Launch Announcement Live Broadcast
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— Dan Shipper 📧 (@danshipper) 23 avril 2026
LIVE VIBE CHECK: GPT-5.5 IS OUT https://
x.com/i/broadcasts/1
qKVmQVoVwaxB
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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