New Fable 5 Is a "Mythos-Class" LLM Available to All, Anthropic Announces
Anthropic unveils Claude Mythos 5 and Fable 5, a restricted-access frontier AI model and guardrailed version for everyone to ...
GPT-5
Anthropic releases state-of-the-art AI model Claude Fable 5, and it's safe to use
Anthropic has unveiled Claude Fable 5, the company's most capable model to date, with performance described as 'exceptional' in software engineering.
Anthropic’s Claude Fable is a version of Mythos the public can access today
Anthropic is releasing Claude Fable 5, its first Mythos-class model available to the public. The model comes with guardrails ...
Anthropic, which claimed AI model was too risky for public to use, releases ‘safe’ version
After hyping potential safety threats posed by its latest AI model, Anthropic says it is releasing a version with tweaks that ...
Anthropic Launches Mythos With Six Features You Absolutely Need
Anthropic launches Mythos with Fable 5. Six capabilities for agents: 80.3% code reasoning, extended thinking, autonomy. Vision, science acceleration, enterprise pricing
Anthropic releases Fable 5 model, built on the same tech that spooked the government
Anthropic released its latest model Tuesday afternoon, heralding the public’s first access to the AI company’s most powerful ...
What smart people are saying about the 2 most controversial parts of Anthropic's new models
Anthropic says Mythos won't help users build competing AI models. Critics said the move quietly degrades responses and limits competition.
Anthropic Claude Fable 5: Why does the new Mythos-class AI model flag simple biology questions about cancer & mitochondria? Here's what we know
India, June 10 -- Artificial intelligence company Anthropic has introduced Claude Fable 5, a new AI system that the company ...
Why Anthropic's 'safe' Mythos-class model won't answer questions about cancer
The broad safeguards built into Anthropic's Claude Fable 5, a Mythos-class AI model, blocks some mundane requests on cybersecurity and biology.
Show HN: Sandbox AI-app lifecycle, from build to run
Hi HN,This is a project I've been working on since the beginning of 2025 full time, without funding.Coding agents have fundamentally changed the way we write software. When you let an agent write code, pull dependencies, and run scripts, you are delegating trust while still keeping the responsibility. You shouldn't have to choose between moving fast with agents and maintaining basic control over your host machine.Normally, we just inspect the final result, treating the app like a black
DeepSWE blows up the AI coding leaderboard, crowns GPT-5.5, and finds Claude Opus exploiting a benchmark loophole
DeepSWE puts GPT-5.5 atop the AI coding leaderboard while raising new questions about Claude Opus, SWE-Bench Pro, and ...
Ask HN: Feeling FOMO re: SpaceX, Anthropic, OpenAI IPOs and the future of tech
What's the future of tech going to be like? Will there even be a point in doing startups when people can just buy out companies for billions of dollars or raise like 100m plus early rounds? It feels like the numbers just went up up up and away and there is now like an infinite amount of money somehow.<p>Has there even been a time like this in the past?
Show HN: Built an open-source local firewall for AI coding agents
GitHub: https://github.com/ashp15205/guardian-runtimeDocs: https://ashp15205.github.io/guardian-runtime/Hi Guys,I built Guardian Runtime: a local FinOps and security proxy for AI coding agents (like Claude Code, Cursor, and Aider).You point your agent to localhost:8080 instead of the real LLM API, and it sits in the middle to do three things:1. Hard Budgets: Auto-kills the agent's internet access if it gets stuck in a retry loop and hits your daily sp
Client Accidentally Burns $500 Million on Claude AI in One Month: Here’s How
A company accidentally spent 500 million dollars on Claude AI in one month after failing to set spending limits.
OpenAI Codex Agents In Action From Data to Decision
© 2026 Schmidt Special Competitive Studies Project, LLC. Licensed under CC BY-NC 4.0 (non-commercial use with attribution). To view a copy of this license, visit https://creativecommons.org/licenses/by-nc/4.0/
Show HN: MCP for the ChatGPT Ads API – Query ChatGPT Ads from Claude and Codex
I built a small MCP server for the ChatGPT Ads advertiser API, which OpenAI opened to the public a couple of weeks ago.It's read-only for now: accounts, campaigns, ad groups, ads and insights (11 tools in total). You can query campaigns from Claude, Codex, Cursor and so on in plain language. Writes ("actions") are next; I have two ideas here: - wrap them in a deterministic tool (json in/out) - add a human in the loop (maybe even a verification/consistency check step bet
Show HN: Cost.dev (YC W21) – making agents cost-aware and cheaper to call
We launched Infracost on HN five years ago (https://news.ycombinator.com/item?id=26064588) where our CLI generated cost estimates for infra-as-code, e.g. "this Terraform PR adds $400/mo". The idea was to shift cloud costs (FinOps) left, so engineers get visibility of costs before deployment and make better decisions.Earlier this year we started seeing agent traffic in our logs and it looked like coding agents were calling our CLI. But that CLI wasn't designed w
OpenAI is retiring GPT-4.5 from ChatGPT on June 27, clearing the deck as Microsoft and Google push their own coding models
Developers who rely on GPT-4.5 inside ChatGPT will lose access to the model on June 27, as OpenAI phases out one of its ...
Ask HN: Is it feasible to run a model on device for complete privacy?
Tried Gemma, Qwen and a few others. Need vision and larger context windows for an application I am working on. Results were quite poor Gemma 4E2B probably the best of the ones I tired but still fell apart and keep hallucinating with ~5000 tokens. Cloud based models had no problems even even Gemini 3.1 Flash-Lite and GPT-5.4 mini do a lot better and a way faster.
Ask HN: My competitors have flawed products but I can't get traction
Problem: I constantly save Instagram Reels/TikToks about restaurants, events, pop-ups, and things to do, but I always forget about them because they get buried in my saves.Solution: I built Cork. You can send a Reel or Tiktok directly to Cork without even needing to leave the app, and Cork will automatically extract the info in the reel and save it in a map + calendar.However, I've been finding it hard to get traction while my competitors have gotten traction/funding. I strongly b
