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GPT-5.5 — AI News Today

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OpenAI's GPT-5.5 — the default ChatGPT model (Instant), with Pro and Thinking variants for paid plans. Lower hallucination in law, medicine and finance, and stronger STEM reasoning. A GPT-5.5-Cyber variant targets cybersecurity.

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33 stories about GPT-5.5

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About GPT-5.5

GPT-5.5 is a large language model by OpenAI. OpenAI's GPT-5.5 — the default ChatGPT model (Instant), with Pro and Thinking variants for paid plans. Lower hallucination in law, medicine and finance, and stronger STEM reasoning. A GPT-5.5-Cyber variant targets cybersecurity. This page tracks 33 recent news stories about GPT-5.5, curated from 30+ sources and updated every 15 minutes.

33 stories
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Top StoryMedia

OpenAI releases GPT-5.5 Instant, a new default model for ChatGPT

OpenAI has quietly introduced GPT-5.5 Instant as ChatGPT's new default model, a move that suggests the company is accelerating its release cadence and potentially addressing widespread complaints about response times that have plagued its flagship product. The shift marks a notable departure from OpenAI's traditionally deliberate approach to model rollouts, signaling either confidence in the technology or pressure to keep pace with competitors who have seized on ChatGPT's recent stumbles. Without clear details on what distinguishes 5.5 Instant from its predecessors, the company is essentially asking millions of users to trust an unnamed upgrade—a gamble that could reshape expectations around AI reliability and transparency.

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3 sources

The New Stack faviconThe New StackTechCrunch on MSN faviconTechCrunch on MSN
I Tested GPT-5.5 for a Week. Then Claude Mythos Dropped and Changed the Math.
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I Tested GPT-5.5 for a Week. Then Claude Mythos Dropped and Changed the Math.

by PIXIPACE — The benchmark finished loading on a Thursday evening and I just stared at the number.

Medium faviconMedium·
Related OpenAI Anthropic Mythos Claude
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How Ramp engineers accelerate code review with Codex

How Ramp engineers use Codex with GPT-5.5 to review code and ship improvements, allowing them to get substantive feedback in minutes instead of hours.

OpenAI faviconOpenAI·
Related OpenAICodex
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Cursor's Composer 2.5 matches Opus 4.7 and GPT-5.5 benchmarks at a fraction of the cost - the-decoder.com

the-decoder.com faviconthe-decoder.com·
Related OpenAI Opus 4.7 Cursor
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Databricks brings GPT-5.5 to enterprise agent workflows

Databricks uses GPT-5.5 for enterprise agent workflows after the model set a new state of the art on the OfficeQA Pro benchmark.

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GPT-5.5-Cyber is here. What it means for defenders operating at the frontier.

Sophos faviconSophos·
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openclaw 2026.5.6

2026.5.6 Fixes Doctor/OpenAI Codex: revert the 2026.5.5 doctor --fix repair that rewrote valid openai-codex/* ChatGPT/Codex OAuth routes to openai/*, which could break OAuth-only GPT-5.5 setups or...

OpenClaw Releases faviconOpenClaw Releases·
Related OpenAI ChatGPTCodexOpenClaw
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Ramp Boosts Dev Speed with Codex GPT-5.5

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Google’s Gemini 3.5 Flash scores within two points of Anthropic’s flagship at roughly one third of the price

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RelatedGoogle AnthropicGeminiGemini Flash 3.5
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OpenAI launches GPT-5.5 with advanced agentic capabilities

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Google is about to release a new Gemini model

Sources | Alex Heath faviconSources | Alex Heath·
RelatedGoogleGemini
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GPT-5.5 may burn fewer tokens, but it always burns more cash

The Register faviconThe Register·
Related OpenAI
Research

GPT-5.5 Instant: smarter, clearer, and more personalized

GPT-5.5 Instant updates ChatGPT’s default model with smarter, more accurate answers, reduced hallucinations, and improved personalization controls.

OpenAI faviconOpenAI·
Related OpenAI ChatGPT
OpenAI’s GPT-5.5 just posted a massive jump in math and multimodal reasoning — scoring 81 on a test the old model routinely failed
Media

OpenAI’s GPT-5.5 just posted a massive jump in math and multimodal reasoning — scoring 81 on a test the old model routinely failed

When researchers at Tsinghua University and other institutions built MMMU-Pro, they designed it to be nearly impossible to game. Every question pairs an image with text, and any item a model can ...

Morning Overview on MSN faviconMorning Overview on MSN·
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Google releases Gemini 3.5 Flash; surpasses GPT-5.5 in agentic benchmarks
Media

Google releases Gemini 3.5 Flash; surpasses GPT-5.5 in agentic benchmarks

Seeking Alpha faviconSeeking Alpha·
RelatedGoogle OpenAIGeminiGemini Flash 3.5
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New benchmark shows Claude Mythos and GPT-5.5 can develop real browser exploits autonomously - the-decoder.com

the-decoder.com faviconthe-decoder.com·
Related OpenAI Anthropic Mythos Claude
Research

How NVIDIA engineers and researchers build with Codex

Teams use Codex with GPT-5.5 to ship production systems and turn research ideas into runnable experiments.

OpenAI faviconOpenAI·
Related OpenAINVIDIANVIDIACodex
Research

Scaling Trusted Access for Cyber with GPT-5.5 and GPT-5.5-Cyber

OpenAI expands Trusted Access for Cyber with GPT-5.5 and GPT-5.5-Cyber, helping verified defenders accelerate vulnerability research and protect critical infrastructure.

OpenAI faviconOpenAI·
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Research

GPT-5.5 Instant System Card

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Frequently Asked Questions

What is GPT-5.5?

GPT-5.5 is OpenAI's GPT-5.5 — the default ChatGPT model (Instant), with Pro and Thinking variants for paid plans. Lower hallucination in law, medicine and finance, and stronger STEM reasoning. A GPT-5.5-Cyber variant targets cybersecurity.

Where can I access GPT-5.5?

GPT-5.5 is available at https://openai.com/index/introducing-gpt-5-5/. It's developed by OpenAI.

What is the latest news about GPT-5.5?

As of today, there are 33 recent stories about GPT-5.5. Recent headlines include: I Tested GPT-5.5 for a Week. Then Claude Mythos Dropped and Changed the Math.; Ramp Boosts Dev Speed with Codex GPT-5.5; OpenAI’s GPT-5.5 just posted a massive jump in math and multimodal reasoning — scoring 81 on a test the old model routinely failed. Updated every 15 minutes.

What other LLM AI models are there?

GPT-5.5 is part of the LLM model category. Browse all comparable AI llm models with live news mentions and benchmarks.