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[AI]■ STORY TIMELINE

ANTHROPIC LAUNCHES FABLE 5 WITH SAFETY GUARDRAILS

Anthropic released Claude Fable 5, a Mythos-class model for general users, equipped with conservative safety classifiers that fall back to Claude Opus 4.8 in roughly 5% of sessions. The model is priced at $10 per million input tokens and $50 per million output tokens.

32 SOURCESFIRST SEEN JUN 9, 09:30 AM► READ THE ARTICLE
Bloomberg Tech+0m

Anthropic PBC has said its new artificial intelligence tool, Mythos, is so good at finding vulnerabilities in software a…

Hacker News+7h 28m

Article URL: https://www.anthropic.com/news/claude-fable-5-mythos-5 Comments URL: https://news.ycombinator.com/item?id=4…

Hacker News+7h 28m

Article URL: https://www-cdn.anthropic.com/d00db56fa754a1b115b6dd7cb2e3c342ee809620.pdf Comments URL: https://news.ycomb…

The Verge+7h 30m

Anthropic just announced Claude Fable 5, a new AI model it said is the most powerful model it has ever made widely avail…

TechCrunch+7h 30m

Anthropic is releasing Claude Fable 5, its first Mythos-class model available to the public. The model comes with guardr…

Bloomberg Tech+7h 31m

Anthropic PBC is widely releasing a version of Mythos that will be blocked from carrying out cybersecurity tasks, months…

Wired+7h 31m

Anthropic is releasing Claude Mythos 5 to trusted organizations and Claude Fable 5 to the public, a version it says can’…

Techmeme+7h 43m

Wired: Anthropic releases Claude Fable 5, a “safe” Mythos-class model it says can't be used for cyberattacks, to the pub…

Techmeme+7h 45m

David Gewirtz / ZDNET: Anthropic prices both Claude Fable 5 and Mythos 5 at $10 per 1M input and $50 per 1M output token…

Techmeme+8h

Rebecca Bellan / TechCrunch: Anthropic says Fable 5 is available on Pro, Max, Team, and seat-based Enterprise plans thro…

Techmeme+8h 5m

Anthropic: Anthropic says Fable 5 uses conservative safety classifiers that trigger a fallback to Claude Opus 4.8 in ~5%…

Techmeme+8h 20m

Derek B. Johnson / CyberScoop: Anthropic says internal and external red team tests of Fable 5 found no universal jailbre…

The Decoder+8h 55m

Anthropic ships two new models, Claude Fable 5 and Mythos 5, that claim to blow past the current Opus generation, especi…

Techmeme+10h 40m

Ethan Mollick / One Useful Thing: Hands-on with Claude Fable 5: impressive results with complex projects, including a da…

Techmeme+11h

Matthias Bastian / The Decoder: Anthropic says Fable 5 has invisible safeguards that use prompt modification, steering v…

TechCrunch+1d 6h

Cybersecurity researchers are complaining that Anthropic's new model Fable has guardrails that are too strict for any cy…

Techmeme+1d 6h

Bloomberg: Dario Amodei says he doesn't know what role Claude played in a missile strike on an Iranian school, and its u…

Techmeme+1d 6h

Dean W. Ball / @deanwball: Anthropic secretly limiting Claude's usefulness for LLM development strengthens the argument…

Hacker News+1d 7h

Article URL: https://techcrunch.com/2026/06/10/cybersecurity-researchers-arent-happy-about-the-guardrails-on-anthropics-…

Techmeme+1d 7h

Tom Warren / The Verge: Sources: Microsoft is restricting employees from using Claude Fable 5 because of Anthropic's new…

Techmeme+1d 8h

Lorenzo Franceschi-Bicchierai / TechCrunch: Cybersecurity researchers complain that Claude Fable's guardrails are too st…

The Verge+1d 9h

Anthropic just released Claude Fable 5, calling it the most powerful AI model it has ever made widely available and prai…

Techmeme+1d 10h

Anthropic: Anthropic releases two policy proposals on how governments should address catastrophic risks and manage labor…

Techmeme+1d 18h

Maxwell Zeff / Wired: Anthropic backtracks on a policy limiting Claude Fable 5's ability to develop other AI models, aft…

The Decoder+1d 22h

Anthropic reverses course on a policy that would have secretly undermined AI researchers, but another point of contentio…

The Verge+2d 2h

Anthropic has apologized for stealthily throttling its new AI model, Claude Fable 5, with hidden guardrails that undermi…

Techmeme+2d 4h

Glenn Gamboa / Associated Press: Anthropic donates $150M to launch Claude Corps, a fellowship program that will teach 1,…

Techmeme+2d 15h

@semianalysis_: Analysis: assuming API pricing, the $200/month Claude Max and ChatGPT Pro plans offer up to ~$8,000/mont…

Techmeme+3d 9h

Edward Ludlow / Bloomberg: Sources: SpaceX decided to rent its Colossus 1 data center to Anthropic after internal teams…

Techmeme+3d 14h

Axios: Source: Howard Lutnick told Anthropic that Mythos 5 and Fable 5 would be subject to export controls after a compa…

Techmeme+3d 15h

Anthropic: Anthropic says it is disabling Fable 5 and Mythos 5 for all customers after the US government issued an expor…

TechCrunch+3d 16h

Anthropic isn't hiding its frustration. "We disagree that the finding of a narrow potential jailbreak should be cause fo…