Redeploying Fable 5(anthropic.com)

75 points by meetpateltech 3 months ago | 20 comments

Evals will break(wanglun1996.github.io)

24 points by rajveerb 5 months ago | 4 comments

Fable 5 update: Still willing to cybercrime(alec.is)

13 points by arm32 3 months ago | 7 comments

Fable 5 On Vending-Bench: Misbehaving, With Plausible Deniability(andonlabs.com)

161 points by optimalsolver 3 months ago | 114 comments

Claude Fable 5: mid-tier results on coding tasks(endorlabs.com)

373 points by bugvader 4 months ago | 217 comments

Endor Labs blog post benchmarking Claude Fable 5 on 200 real-world coding tasks for its Agent Security League, reporting middling functional and security results.

Statement on US government directive to suspend access to Fable 5 and Mythos 5(anthropic.com)

3025 points by Dylan1312 4 months ago | 2185 comments

Anthropic announcement that a US government export control directive forces it to suspend access to its Fable 5 and Mythos 5 models for all customers.

Claude Fable is relentlessly proactive(simonwillison.net)

676 points by lumpa 4 months ago | 556 comments

Simon Willison blog post describing Claude Fable 5 as relentlessly proactive, illustrated with an example of fixing a scrollbar glitch in Datasette Agent.

Claude Fable 5.1 and Claude Mythos 5.1(anthropic.com)

1332 points by denysvitali 1 month ago | 1269 comments

Anthropic documentation page describing new features, breaking changes, and capability improvements in Claude Fable 5.1 and Claude Mythos 5.1.

Claude Fable 5(anthropic.com)

2521 points by Philpax 4 months ago | 2018 comments

Anthropic announcement post introducing two new AI models, Claude Fable 5 and Claude Mythos 5, dated June 9, 2026, with a linked system card.

What it feels like to work with Mythos(oneusefulthing.org)

341 points by swolpers 4 months ago | 302 comments

Ethan Mollick's One Useful Thing post describing his early-access experience with Claude 5 Fable, the first publicly released Mythos-class AI model.

Fable 5.1 Solves the Cyphral Distich, a 370-year-old cipher(vals.ai)

1150 points by u1hcw9nx 1 month ago | 528 comments

Vals AI blog post reporting that Claude Fable 5.1 solved the Cyphral Distich, an unsolved cipher from 1653, within a day when given it as an open task.

Fable Took My Job(cendyne.dev)

162 points by jllyhill 14 days ago | 196 comments

A personal blog post by Cendyne describing losing an engineering job after leadership decided an LLM called Fable was cheaper than their compensation.