Fable 5 comes back, gets jailbroken, and vanishes again
Anthropic re-released Fable 5 on July 1 with new cyber-blocking classifiers; Pliny jailbroke it the same day and it went offline again July 2.
What they showed / shipped
- Anthropic announced Fable 5 (and Mythos 5) would be available again globally after 'productive conversations with the US government' - redeployed with new classifiers that block more cybersecurity tasks.
- Catch: routine coding and debugging now fall back to Opus 4.8 while the classifiers fire, so you don't always get Fable on code.
- It rolled out first on Amazon Bedrock ahead of the API and Claude.ai, and Perplexity re-enabled it as an orchestrator model in Comet.
- Same-day whiplash: Pliny jailbroke it hours after launch and it was pulled offline again on July 2.
- On the subscription it's a limited window - free until July 7, then API-only.
Why it matters
- The classifier fallback means 'using Fable 5' and 'getting Fable 5 on your task' are now two different things - if coding silently routes to Opus 4.8, benchmark and cost assumptions built on the top model don't hold.
Sources
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x/@AnthropicAI X@AnthropicAI
♥ 42K↻ 6.4K👁 13M -
x/@perplexity_ai
X@perplexity_ai
♥ 367↻ 16👁 24K -
x/@kimmonismus
X@kimmonismus
♥ 1.5K↻ 29👁 261K
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x/@petergyang
X@petergyang
♥ 45↻ 3👁 13K
- reddit/r-singularity Redditreddit.com
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ars/anthropic-global-release
arstechnica.com
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digg/bedrock-redeploy
digg.com
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yt/@WesRoth
YouTubeyoutube.com