GPT-5

Tell HN: Codex macOS app switches to Fast speed after update without asking

I just updated my Codex macOS app, which enables the new GPT-5.5 model. I&#x27;ve intentionally kept the speed to &quot;Standard&quot; to not burn through my tokens too fast.<p>After the latest update of the app, I notices that OpenAI changed the speed to Fast without asking, a change that burns up to 1.5x more tokens.

GPT-5.5 – No ARC-AGI-3 scores

Did the model perform poorly and OpenAI decided to not publish arc agi 3 scores? This is honestly the best benchmark right now to measure true intelligence.

AI News: Sunday, April 19th, 2026

Here are this week's top stories in AI (April 13-19, 2026): The Agentic Arms Race: Anthropic launched Claude Opus 4.7, securing benchmark-leading scores in software engineering and multi-step agentic workflows. OpenAI countered by transforming Codex into a desktop "superapp" capable of running in the background across native Mac apps and scheduling its own autonomous tasks. "Too Dangerous to Release": Anthropic revealed its unreleased Claude Mythos model is being restricted to a small whitelis

AI News: April 13-19, 2026

Here are this week's top stories in AI (April 13-19, 2026): The Agentic Arms Race: Anthropic launched Claude Opus 4.7, securing benchmark-leading scores in software engineering and multi-step agentic workflows. OpenAI countered by transforming Codex into a desktop "superapp" capable of running in the background across native Mac apps and scheduling its own autonomous tasks. "Too Dangerous to Release": Anthropic revealed its unreleased Claude Mythos model is being restricted to a small whitelis

Kimi K2.6 Breakdown: the Open-Source AI That Beats GPT-5.4 at Coding

Explore how Kimi K2.6 beats proprietary AI models in software engineering, alongside a breakdown of OpenAI's new Chronicle screen memory tool.

OpenAI briefs governments on GPT-5.4-Cyber’s security potential

OpenAI is presenting its new GPT-5.4-Cyber model to U.S. federal agencies, state governments, and Five Eyes allies, showcasing its potential for defensive cybersecurity. The AI can rapidly identify, ...

Why Anthropic’s Mythos is sparking global alarm

Anthropic PBC has said its new artificial intelligence tool, Mythos, is too powerful to release to the general public. The AI ...

Trump says Anthropic is shaping up and a deal is 'possible' for Department of Defense use

Trump said his administration had "some very good talks" with Anthropic during a meeting at the White House last week.

Trump Wants to Blacklist Anthropic. Claude Mythos Shows He Can’t Afford To

Multiple agencies of the Trump administration have adopted irreconcilable positions on Anthropic and its newest model, Claude ...

Sam Altman compares Anthropic's Mythos to dropping a bomb while selling a $100 billion bomb shelter

OpenAI CEO Sam Altman said in contrast to Anthropic's recent moves, OpenAI would err on the side of giving more people access ...

Rogue Group Gains Access to Anthropic’s Dangerous New Mythos AI

That didn't take long. The post Rogue Group Gains Access to Anthropic’s Dangerous New Mythos AI appeared first on Futurism.

Restricted Mythos AI model reaches unauthorized users, triggering Anthropic probe

American AI developer Anthropic said Tuesday it was investigating unauthorized access to Mythos, its powerful model which the ...

Anthropic’s New A.I. Model Sets Off Global Alarms

Mythos has triggered emergency responses from central banks and intelligence agencies globally, as Anthropic decides who has ...

Anthropic's Claude Code pricing pain is Sam Altman's pleasure

Amid confusion over if Claude Code was being removed from Anthropic's Pro plan, OpenAI's CEO and employees did some trolling ...

Anthropic is investigating 'unauthorized access' of its Mythos cybersecurity tool

Anthropic is investigating potential "unauthorized access" to its Claude Mythos model that has been touted for its ability to ...

Anthropic’s ‘Too Dangerous’ Mythos AI Hacked on Day One While White House Plans Rollout

A Discord group accessed Anthropic's restricted Mythos AI on day one using Mercor breach data and contractor credentials.

Show HN: GoModel – an open-source AI gateway in Go

Hi, I’m Jakub, a solo founder based in Warsaw.I’ve been building GoModel since December with a couple of contributors. It&#x27;s an open-source AI gateway that sits between your app and model providers like OpenAI, Anthropic or others.I built it for my startup to solve a few problems: - track AI usage and cost per client or team - switch models without changing app code - debug request flows more easily - reduce AI spendings with exact and semantic caching How is it different? - ~17MB d

Show HN: API Ingest – Agentic Search (Inter) API Docs

1. CC &#x2F; Codex dont handle API Docs well enoughNo matter what I do, I run into bad requests with claude, day in, day out.Its making up arguments, misunderstands required types, and misses fields in the requests. And when it catches its issues, the then inititated web search usually ends fuzzy scraped information, that yields even more issues.Context7 helps. Its better than starting only with the LLM&#x27;s vague (mis)understanding from pretraining. But it only does semantic search. And often

Tell HN: OpenAI Codex Service_unavailable_error in OpenCode

Currently getting service_unavailable_error, server_is_overloaded errors in OpenCode<p>Anyone experiencing the same issue?<p>OpenAI status does seem green

Show HN: Modern AI client for Mac with agentic tools, clean UI, builtin privacy

If you don&#x27;t like Claude Desktop or ChatGPT app you&#x27;re not alone, here are some of the reasons why I don&#x27;t like them and decided to built an alternative.Lack of control You can’t control the web-search (depth, breadth and number of sources, image search, video search providers - yeah I like to search stuff on youtube and embed them into canvas)you can’t control how many tokens you’re willing to burn for specific prompt, number of agentic loops, all you got is only “Extended Thi