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Claude Fable 5 and Claude Mythos 5 (opens in new tab) 252 articles covering this post

anthropic.com··Lobsters, Hacker News, r/ChatGPT, r/GithubCopilot, r/OpenAI, r/artificial, r/singularity·Covers: Assessing Claude Mythos Preview's cybersecurity capabilities, Show HN: A full on end to end Payment System +2 more·Open original

Covered in 252 articles

Anthropic shuts down Claude Fable 5 to comply with US government directive

xda-developers.com·

Claude Fable 5 caught bugs GPT-5.5 and Opus 4.8 missed, then the US government forced it offline

xda-developers.com·

Anthropic just publically released its Mythos-grade AI at no extra cost for a limited time

xda-developers.com·

Claude Fable 5 vs GPT-5.5: Should You Use the New Model for Everything?

blog.kilo.ai··Hacker News, Hacker News

Claude Fable 5 is Live in Kilo

Anthropic just released public Mythos-class AI model called Claude Fable, details here

Full Fathom Five: The context of Anthropic’s Mythos-class public release

Claude Fable is relentlessly proactive

simonw.substack.com··Substack

Anthropic hands the public Mythos-class AI

therundown.ai·

Anthropic’s too-scary-to-release AI hacking tool is actually coming out — kind of

androidauthority.com·

All the news about Anthropic’s new AI fight with the White House

·

Anthropic cuts off Fable 5 and Mythos 5 access following government order

·

Anthropic apologizes for invisible Claude Fable guardrails

··Hacker News

Claude Fable is too scared to teach you about the powerhouse of the cell

··Hacker News

The White House vs. Anthropic's New AI Model

Daily Reading List – June 9, 2026 (#801)

Anthropic finally releases Mythos to the public, but it's so heavily guarded it barely works

howtogeek.com·

Anthropic's most powerful model comes with a kill switch aimed at you

boingboing.net·

Anthropic rolls out Claude Fable 5, but it's available for a limited time

bleepingcomputer.com·

Anthropic launches powerful Fable 5 model publicly, while keeping Mythos restricted over cybersecurity concerns

Anthropic Launches Claude Fable 5, Its First Public Mythos-Class Model

macrumors.com·

Fable 5 refusals are 200 OK — your error handler misses them

Fable 5 Banned: What Happens When Your AI Governance Lives Inside the Model

The AI They Said Was Too Dangerous — Is Now Inside the NSA

Claude Fable 5 review: I let Anthropic's new "bazooka" loose on my SaaS

Why everyone is talking about loop-engineering and how is it changing agentic ai workflows? Claude Code and Web Scraping examples

Claude Fable 5 on Databricks is a step-change for agentic workflows

Claude Fable 5 can run for days. When does a solo dev actually want that?

Claude Fable 5 and Mythos 5 are here.

Claude Fable 5: What It Is and What It Means for Developers

Pliny the Liberator 🐉󠅫󠄼󠄿󠅆󠄵󠄐󠅀󠄼󠄹󠄾󠅉󠅭 (@elder_plinius)

xcancel.com··Hacker News

Ctrl-Alt-Speech: Cupertino d’État

Anthropic recruits army to sell Claude to nonprofits

theregister.com·

It blocked us at 'hello!' Anthropic Fable 5 refusing innocuous prompts

theregister.com··Hacker News

Anthropic spins a Fable of a tamer, safer Mythos

theregister.com·

Anthropic Launches Claude Fable 5: Mythos-Class AI With Cybersecurity Guardrails

securityweek.com·

Claude Fable 5 brings Mythos to the masses — Anthropic's new frontier model is 'state-of-the-art on nearly all tested benchmarks'

tomshardware.com

·

Anthropic Was So Concerned About Its New Mythos-Based Model’s Power That It Lobotomized Its Ability to Improve Itself

"Dangerous" AI models are coming no matter what

arstechnica.com·

Anthropic says these topics are too dangerous to let its Fable 5 model talk about

arstechnica.com·

After backlash, Anthropic says its AI will now tell users when their request is being rejected or downgraded for national security concerns

·

Haiku, Sonnet, Opus, Mythos, Fable . I’m not a fan of Anthropic’s business bu...

Class of AI Models Hyped as Scarily Powerful Apparently Scared the Government Too Much and Now They’re Disabled

Anthropic’s Mythos Safeguards Stoke Fears of a ‘Permanent Underclass’

The White House’s New Anthropic Restrictions, Explained

thedispatch.com

·

‘Dangerous’ AI Models Are Coming No Matter What

wired.com··Hacker News

Designing Loops - A Practitioner's Short Field Guide

interestingengineering.substack.com··Substack

Why Anthropic suddenly pulled Fable 5 and Mythos 5 for everyone

Agentic coding and mental models

philbooth.me··Hacker News

Anthropic's Fable AI brings the capabilities of its unreleased Mythos model to regular users

Initial impressions of Claude Fable 5

simonwillison.net··Hacker News

Claude Fable 5 🚀, Gemini 3.5 Live Translate 📱, scaling test time compute 📈

Linux Kernel 0-Day 🐧, Hades PyPI Worm 🐍, Anthropic Fable 5 🪄

[AINews] Anthropic Claude Fable 5 — Mythos but Safe, with Controversial Terms

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American Government Takes Down Claude Fable

lesswrong.com·

Thoughts on Claude Fable's silent safeguards

lesswrong.com·

MythOS - The Rise of AGI

lesswrong.com·

Three Labs With a Plan and A Memorandum

lesswrong.com·

The Anthropic Fable mess, explained

thenewstack.io·

Fable 5 vs Opus 4.8: The real stakes, not the spec sheet

thenewstack.io·

Anthropic launches Claude Mythos/Fable 5, but you better try it soon

thenewstack.io·

AI Week in Review 26.06.13

patmcguinness.substack.com··Substack

CL4R1T4S/ANTHROPIC/CLAUDE-FABLE-5.md at main · elder-plinius/CL4R1T4S

github.com··Hacker News

Anthropic ships major Claude Design overhaul with design system imports, code round-trips, and a fix for its token-burning problem

venturebeat.com·

Anthropic brings Mythos to the masses with Claude Fable 5, its most powerful generally available model ever

venturebeat.com·

Anthropic’s Claude Fable 5 is out for public use, with safeguards for high-risk requests

helpnetsecurity.com·

Claude Mythos goes public in new Fable 5 model that’s ‘safe for general use’

9to5google.com·

Anthropic suspends new AI models after government directive

AI too good it's illegal

Introducing Claude Fable 5

Anthropic Releases Claude Fable 5, Its Most Powerful AI Yet, With Cyber Safeguards

thehackernews.com·

AI models can disappear overnight. Is your engineering team built to survive it?

Daily Hacker News for 2026-06-09

daemonology.net·

AI inequality: from GPU-poor to token-poor

adlrocha.substack.com··Substack

Anthropic's Fable a cautionary tale

Gaslighting Openness

lucumr.pocoo.org··Hacker News

Americans Fear AI’s Societal Impact and Don’t Believe Government Can Regulate It, Pew Study Finds

Anthropic releases state-of-the-art AI model Claude Fable 5, and it's safe to use

tweaktown.com·

Mythos found the bugs. Who pays for the fixes?

opub.dev··Hacker News

I Tested Claude Fable 5: Can Anthropic’s Newest AI Deliver on the Hype?

analyticsvidhya.com·

☕🤖 Meet Claude Fable 5: The New Model Topping Every Benchmark

theaibreak.substack.com··Substack

Crypto’s next billion-dollar hacker may move at superhuman speed

Anthropic Claude Fable 5 on AWS: Mythos-class capabilities with built-in safeguards now available

aws.amazon.com·

The next AI safety fight may actually be about DNA

·

🤖 AI Agents Weekly: Claude Fable 5, Kimi K2.7-Code, NotebookLM Goes Agentic, DiffusionGemma, MiMo Code, and More

nlp.elvissaravia.com

·

The Anthropic ‘Fable’ saga proves: we have opened the AI Pandora’s box. What now? | Nathan E Sanders and Bruce Schneier

theguardian.com··Hacker News

Setting a custom price for a model in AgentsView

til.simonwillison.net·

The AI Glass Ceiling

tomtunguz.com·

Anthropic launches Claude Fable 5 with advanced cybersecurity safeguards

Anthropic launches Claude Fable 5, a state-of-the-art AI model that beats OpenAI's GPT-5.5

American Government Takes Down Claude Fable

thezvi.substack.com··Substack

Three Labs With a Plan and A Memorandum

thezvi.substack.com··Substack

Claude Fable 5 Is Here, But You Probably Won’t Need It

phandroid.com·

Claude Fable 5 and Mythos 5 pricing: Anthropic's new $10/$50 top tier

aipricing.guru··Hacker News

Anthropic launches Claude Fable 5 with Mythos safeguards

kite.kagi.com·

Anthropic releases public Claude Fable 5 with safeguards

kite.kagi.com·

Anthropic releases Claude Fable 5, Mythos 5

Anthropic Releases Claude Fable 5 to Pro, Max, and Enterprise Users Free Until June 22

American Government Takes Down Claude Fable

thezvi.wordpress.com·

Three Labs With a Plan and A Memorandum

thezvi.wordpress.com·

The wall: vibe coding, taste, and the part that doesn't get easier

gk3fyi.substack.com··Substack

OSD 381: A chaotic tyrant is better than an effective one

opensourcedefense.substack.com··Substack

Ad Astra Per Nasdaq: Ten31 Timestamp 953,518

ten31timestamp.com·

llmdevsilo: Using LLMs to develop code securely

The US Government Switched Off Anthropic's Most Powerful AI for the Entire World

christianfindlay.com·

Apple's 'surprising' T&S move, another teen ban and 63,000 kids target the Kremlin

everythinginmoderation.co·

Ai News Recap: June 12, 2026

neuralbuddies.com·

The Sequence Radar #877: Last Week in AI: Anthropic Ships, Apple Borrows, Musk Lists, Bezos Builds

thesequence.substack.com··Substack

🙀 US Gov Shuts Down Claude Fable

theneurondaily.com·

😸 Claude Fable Five is Anthropic's Most Controversial Model Yet

theneurondaily.com·

Claude Fable 5 and new AI safety fables

interconnects.ai··Hacker News

Claude Fable 5: Available on Google Cloud

cloud.google.com·

How to use AI doom marketing to dupe the media and rake in billions in 10 easy steps

bloodinthemachine.com·

Fable 5.

substack.news-items.com

·

Anthropic’s 30-Day Data Policy Exposes Enterprise AI Governance Gaps

Microsoft Balks at Anthropic’s Claude Fable 5 Data Retention Policy

Anthropic Launches Mythos-Class Models After Developing Safeguards

Anthropic Launches Claude Fable 5, Its First Public Mythos-Class AI Model

macobserver.com·

Why Anthropic Is Fighting With Trump (Again)

foreignpolicy.com

·

Show HN: The Ruby AI Newsletter

rubyai.beehiiv.com··Hacker News

Claude Gatekeeping Controversy, Solar Surpasses Coal, SpaceX Unveils AI Satellite

contraryresearch.substack.com··Substack

What is Claude Mythos? And how to see it in action with Claude Fable 5

Anthropic, please don’t ruin bio for everyone

U.S. Halts Foreign Access to Anthropic’s Fable 5 and Mythos 5 AI Models Over National Security

chiangraitimes.com·

Agent-Friendly Interfaces Are a Token-Efficiency Strategy

nokv.io··Hacker News

Not Your Weights, Not Your Workflow (Claude Fable 5 Export Ban)

thecoder.io··Hacker News

AWS Destroyed the Value Proposition for Bedrock

securosis.com·

Blog post https://www.anthropic.com/news/claude-fable-5-mythos-5

twitter.macworks.dev

·

Anthropic sets AI performance records with new Mythos 5, Fable 5 frontier models

siliconangle.com·

AISN #75: Anthropic Releases Fable, the US Government Restricts it

newsletter.safe.ai·

Welcome to the Agentic Era. Ready or Not

mikehyland.com··Hacker News

The Last Open Frontier

mikehyland.com··Hacker News

Some Ethical Problems with AI

arkvis.com··Hacker News

How Anthropic trained Fable 5 => by analysing its reasoning traces

ankitmaloo.com··Hacker News

DEW #159 - Synthetic Logs for Detection, Device Code Phishing Detection & Mythos 5 release

detectionengineering.net·

A slap in the face: US export ban on Anthropic's most advanced AI models and the European technological sovereignty

datalawgy.substack.com··Substack

The Anthropic Fable mess, explained

cautiousoptimism.news··Hacker News

What is new in data, technology & digital laws? - A weekly overview

datalawgy.substack.com··Substack

Weekly Firgun Newsletter – June 12 2026 | pre-seed funding

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Anthropic's Self Governance Is an Act of Social Violence

cezarbabin.com··Hacker News

Anthropic launches Claude Fable 5 with new safeguards

Sebastian Mallaby, Biographer of Demis Hassabis — Lessons from 100+ AI Insiders on The Race to Superintelligence, The Religion of AI, and Spotting Breakthroughs...

How Fable 5 And Mythos 5 Change AI Security, Data Retention, And Vendor Risk

forrester.com·

🟩 Trump administration imposes export controls on new Anthropic model, US-Iran peace deal announced, Ebola spreads further || Global Risks Weekly Roundup #24/20...

blog.sentinel-team.org·

⚡ 14JUN2026: Running to Wu Tang

Hey Siri, Call Google

demaree.me··Hacker News

Mythos-class models will diffuse throughout the world by 2029

spateder.com··Hacker News

Skimming an AI answer cost me 100 passwords

alwaysdraft.com··Hacker News

WWDC 2026: Between Seasons

macstories.net·

Anthropic releases Mythos-class Fable 5 model with safeguards for cyber risks

csoonline.com·

Kayfable

thealgorithmicbridge.com·

Nine Things About Claude Mythos 5 That Matter If You’re Not an Enterprise Customer

thealgorithmicbridge.com·

Today, we're introducing Claude Fable 5 and Mythos 5, two configurations of our next major language model.

threadreaderapp.com·

After backlash, Anthropic says its AI will now tell users when their request is being rejected or downgraded for national security concerns

finance.yahoo.com·

Visible Boundaries Earn Trust | Vigil Harbor

blog.vigilharbor.com··Hacker News

AIs Are Getting Increasingly Dangerous

controlai.news·

Claude Fable 5 Free Through June 22 on Pro, Max, Team, and Enterprise Plans

claude5.ai··Hacker News

Anthropic Releases Claude Fable, a 'Safe' Version of Mythos

#072 - Washington kills Claude Fable 5 and Mythos 5, builders flee to local agents at $0

indiehacker.news·

HN AI Highlights – weekly digest of the best AI posts

hn-ai-newsletter.beehiiv.com··Hacker News

Wednesday 10 June — Claude Code 2.1.170

We have ways of making you pay

betterthangood.xyz·

#069 - Anthropic's Fable 5 can silently get dumber, Apple's container ships Docker-killer Linux VMs

indiehacker.news·

New Fable 5 Is a "Mythos-Class" LLM Available to All, Anthropic Announces

infosecurity-magazine.com·

Memia #2026.24: A Fable of power and control📖 MANGOS🥭 flows, not fundamentals💸🌊 ultrasonic espresso☕🔊 portable drone factories📦 robiotics🍓 katuš shortfall🌿🍄 sna...

memia.substack.com··Substack

Anthropic has caught up to OpenAI in image understanding

understandingai.org

·

Memia #2026.23: el nino inbound🌡 fable 5🤯 hey, siri (gemini)🍎♊ non-human corporation🤖🇦🇷 recursive self-improvement📈⏸️ tax heavens💸🪐 majorana 2⚛️🤔 tokenomics🪙📊 humanbot🧠 supa supabase🦄

memia.substack.com··Substack

How to help knowledge workers who lose their jobs to AI

platformer.news·

Sunday Rundown #145: Deep Research & Deep Cuts

Do You Even Need Claude Fable 5?

Two weeks with Claude Fable 5

claudecodecamp.com·

Claude Fable 5: Anthropic Releases Public Version Of High-Risk AI

ubergizmo.com·

TooMuchCoding Newsletter #26

toomuchcoding.com·

Anthropic releases Mythos-derived model with cyber guardrails

metacurity.com·

Anthropic releases Mythos-class Fable 5 with safeguards for cyber risks

Anthropic’s Mythos goes public—on a short leash

Are Mythos’ cyber capabilities overhyped?

epochai.substack.com··Substack

US order forces Anthropic to pull Claude Fable 5 and Mythos 5 offline

Issue 495Claude Fable 5

AI Security and Safety: A Wake-Up Call to Marketers

ipullrank.com·

Claude Fable 5: The harness matters more than the model

endorlabs.com··Hacker News

Claude Fable 5: Mythos-grade hype, record cheating, and a few hall-of-fame entries | Blog

endorlabs.com··r/netsec

Deep Learning Weekly: Issue 459

deeplearningweekly.com·

Anthropic Rolls Out Claude Mythos 5 AI Model—Along With the Safer Fable 5 for the Public

Bye bye Fable

bensbites.com·

New Claude model - Fable

bensbites.com·

Anthropic Mythos Security Audit Found No ‘Serious’ Bugs in Zcash: Wilcox

cointelegraph.com·

Crypto users wary as Anthropic releases Claude Mythos with safeguards

cointelegraph.com·

AI to ROI News & Analysis: June 12, 2026

ai2roi.substack.com··Substack

Claude Fable 5 available today in Microsoft Foundry: Powering the next era of autonomous agents

azure.microsoft.com·

Anthropic rolls out ‘Mythos-like’ AI model Claude Fable 5

siliconrepublic.com·

xAI's Compute Pivot, Robot Soldiers, & Claude's Limits

briefing.forwardfuture.ai·

What Do You Need to Know About Claude Fable 5?

Srsly Risky Biz: Anthropic Lacks Emotional Intelligence

news.risky.biz·

Srsly Risky Biz: Europe Wants To Wean Itself Off US Tech

news.risky.biz·

Risky Bulletin: Meta says NSO violated court order with new campaign targeting WhatsApp

news.risky.biz·

Anthropic releases Claude Fable 5, a locked-down, safer version of Mythos

sherwood.news·

Claude Fable 5 from Anthropic now available on AWS

aboutamazon.com·

[Dev Weekly #115] Claude Fable 5 Outperforms GPT-5.5 | AI-Generated Code Needs Four Validation Gates | React Compiler Goes 10x Faster in Rust - The Miners

blog.codeminer42.com·

I've Joined OpenAI, fwd:cloudsec, AWS Well Architected Supply Chain Security

Claude Fable 5 review: what the new Mythos model gets right (and very wrong)

lennysnewsletter.com·

Intelligent Machines 874: Google Knows I Love the Pepper Cannon

Anthropic suspends access to latest AI models following US order

Anthropic suspends access to Fable 5 and Mythos 5 AI models following U.S. government directive

shacknews.com·

Anthropic shares timelapse video of Claude Fable 5 AI vision model beating Pokemon FireRed

shacknews.com·

In other languages

역대 최강 모델이 포켓몬을 비전만으로 깼다 — Fable 5 가격·성능 정리

Claude Fable 5 and Mythos 5 [Linkpost]

lesswrong.com·

Kommentar: Die beste Werbung für alternative KI-Hersteller

Fable 5 blockiert auch sicheren Code

Anthropic veröffentlicht Claude Mythos 5 als Fable 5 mit Einschränkungen

Claude Fable 5 är första Mythos-modellen för allmänheten

sweclockers.com·

Waarom legt de regering-Trump het nieuwe AI-model van Anthropic aan banden? ‘Dit lijkt beleid van ongekozen techbro’s’

volkskrant.nl·

Dünya Halleri: 255

bulten.mserdark.com·

Anthropic pod presją Waszyngtonu. Władze USA kazały odciąć dostęp do nowych modeli

android.com.pl·

Americká vláda zakázala Anthropicu poskytovat Fable 5 a Mythos 5 zahraničním uživatelům

Nejpokročilejší modely Claude mají stopku. Americká vláda se bojí zneužití - Seznam Zprávy

seznamzpravy.cz·

Maulkorb statt Cyberwaffe: Neues KI-Modell Claude Fable 5 ist da

Anthropic heeft toegang tot nieuwe AI-modellen uitgeschakeld, na exportbeperking door VS

·

SpaceX-Börsengang: Apple stolpert hinterher. Anthropic prescht vor

No es bueno que los campesinos tengan ballestas

Anthropic livre Claude Fable 5, une version bridée de Mythos

lemondeinformatique.fr·

GPT-5.5に29点差。政府限定だった『Mythos』が Claude Fable 5 として解禁【独自検証】｜AGIラボ

chatgpt-lab.com·

Mythos-KI von Anthropic: Anthropic veröffentlicht Variante von KI-Modell Mythos

Anthropic 發佈 Claude Fable 5 首款 Mythos 級 AI 模型

hk.news.yahoo.com·

LLM Benchmark: Fable 5 e a novela da Anthropic

akitaonrails.com·

« Nous avons fait le mauvais choix » : Anthropic a discrètement saboté Fable 5 et fait des victimes collatérales

Pris en flagrant délit, Anthropic avoue avoir secrètement dégradé les performances de son IA surpuissante Fable 5

Claude Fable 5 : et si les restrictions de Mythos n’avaient finalement rien à voir avec la sécurité ?

Anthropic lança IA de nível Mythos, mas com salvaguardas

cisoadvisor.com.br·

Claude Fable 5 : Anthropic libère sa première IA de niveau Mythos, et évoque un modèle mystérieux

기술 뉴스 #296 : 2026-06-16

blog.outsider.ne.kr·

Mythos-Modell Claude Fable 5: Anthropic veröffentlicht bisher mächtigstes KI-Tool

Anthropic habilitó la IA más avanzada en ciberseguridad y código, pero le tiene tanto miedo que no te deja usarla a pleno rendimiento

xataka.com.mx·

Claude Fable 5 のゲーム制作能力は、今までのモデルより頭一つ抜けて優れているかも

aba.hatenablog.com·

Anthropic met entre toutes les mains un modèle qu'elle jugeait trop dangereux à publier il y a deux mois

Claude Fable 5 : le modèle "Mythos" qu'Anthropic jugeait trop dangereux est maintenant entre vos mains

lesnumeriques.com·

Vol.107 Claude Fable 5 引爆AI圈：最强模型降价，高端版本受限，能力分发迎来转折 | 莫尔索

Estados Unidos pulsa el botón del miedo con Claude Mythos y Fable 5. Es un apagón con un claro beneficiado: China

Claude Fable 5 es el modelo de IA público más potente de la historia. También el más caro, exclusivo y frustrante

Anthropic lanserar Claude Fable 5 – Mythos för vanligt folk

computersweden.se·

Mythos 5 nur für ausgewählte Partner: Anthropics Fable 5 ist zu mächtig ohne Ketten

computerbase.de·

Anthropic、「Mythos 5」を限定提供。一般向けには制限付き「Fable 5」

Claude Fable 5: Anthropics mächtigstes Modell ist jetzt öffentlich, aber mit Bedingungen

stadt-bremerhaven.de·

2026 06 10 HackerNews

supertechfans.com·

Claude Fable 5: 코딩 작업에서 중간 수준 결과

8 минут назад

Илон Маск обтриллионился на IPO SpaceX, а США запретили Mythos/Fable для всех неамериканцев

Anthropic, Fable 5, Claude Code и большой отбор игрушек

Я попросила Claude Fable 5 сделать игру одним промптом. Получился симулятор админа ИИ-канала

Anthropic представила Claude Fable 5 и закрытую Mythos 5

Выпущен бенчмарк FrontierCode для оценки ИИ-моделей по «качеству пулл-реквестов»

Anthropic выпустили Fable 5 (модель уровня Mythos) для всех