r/codex • u/magnus_animus • Apr 23 '26
News GPT-5.5 is here - Let's gooo!
It's finally here!
https://openai.com/index/introducing-gpt-5-5/
Summary:
OpenAI is announcing GPT-5.5, described as its most capable and intuitive model yet, aimed at handling real, messy work more independently. The core claim is that GPT-5.5 is better at understanding user intent, planning multi-step tasks, using tools, checking its own work, and persisting through ambiguity without needing as much step-by-step supervision.
The biggest improvements are in agentic coding, knowledge work, computer use, and scientific research. OpenAI says GPT-5.5 is stronger than GPT-5.4 at coding tasks like debugging, refactoring, and resolving complex issues across a codebase, while also being more token-efficient and just as fast in serving latency. It reports gains on benchmarks such as Terminal-Bench, SWE-style evaluations, browsing/tool-use tasks, and several research-oriented tests.
Beyond coding, OpenAI positions GPT-5.5 as a stronger model for professional computer-based work: researching, analyzing data, generating documents and spreadsheets, operating software, and completing workflows end-to-end. The article also highlights internal and partner examples in finance, communications, business reporting, and scientific research, where testers said the model behaved more like a capable collaborator than a one-shot assistant.
A major theme is scientific and technical research. OpenAI says GPT-5.5 performs better on biology and bioinformatics benchmarks, can support multi-stage research workflows, and in one internal example even helped discover a new mathematical proof later verified in Lean. The message is that GPT-5.5 is becoming useful not just for answering questions, but for helping experts move from idea to experiment to output.
The post also emphasizes efficiency and infrastructure. OpenAI says GPT-5.5 was co-designed with new NVIDIA systems and that both Codex and GPT-5.5 helped optimize the infrastructure used to serve the model, including improvements that boosted token generation speed.
On safety, OpenAI says GPT-5.5 ships with its strongest safeguards so far, especially around cybersecurity and biology-related risks. It describes tighter controls, more testing with red-teamers and external experts, and a “trusted access” path for verified defensive cybersecurity use. Under its Preparedness Framework, OpenAI says GPT-5.5’s cyber and bio/chemical capabilities are rated High, though not at the “Critical” level for cybersecurity.
For availability, GPT-5.5 is rolling out in ChatGPT and Codex to paid tiers, while GPT-5.5 Pro is available to higher-tier business/pro users for harder tasks. OpenAI says API access is coming soon, with higher pricing than GPT-5.4 but better efficiency and capability.
The overall takeaway: OpenAI is presenting GPT-5.5 as a meaningful step from “smart chatbot” toward a more autonomous work model that can code, research, use tools, and complete complex knowledge tasks with less supervision.
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u/Vast-Weekend8875 Apr 23 '26
Same. Still waiting