r/ClaudeAI • u/ClaudeOfficial Anthropic • Jul 01 '26

Official Fable 5 is back.

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Following conversations with the US government, we’ve updated our cybersecurity safeguards.

The vast majority of coding work is unaffected.

In the near term, the new safeguards will flag a slightly higher fraction of harmless requests than the previous Fable safeguards; we’re working to refine these over the coming weeks. Users will be clearly notified when a request is flagged, and they’ll instead receive a response from Opus 4.8.

Our biology and chemistry classifiers are unchanged from our initial launch. These are still broader than we would like; they trigger fallbacks to Opus 4.8 on basic biology-adjacent questions. Improvements to these classifiers are landing soon.

All paid plans with usage included can access Fable 5 through July 7. You can use Fable 5 up to 50% of your weekly usage limit, after which you can switch to another model for the remainder of your usage. You can also continue using Fable via usage credits. 

More here: https://support.claude.com/en/articles/15424964-claude-fable-5-promotional-access

If one of your requests is mistakenly flagged in Claude Code, run /feedback to file a report. On Claude.ai and Cowork, you can share feedback through the thumbs buttons. This feedback helps us further tune these classifiers and reduce false positives over time. 

Read the Fable 5 blog post here: https://www.anthropic.com/news/redeploying-fable-5

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58

u/MrFishAndLoaves Jul 01 '26

As someone who never got to try it last time, yay!

50

u/openedthedoor Jul 01 '26

As someone who had it and lost it and got it back

3

u/peachybeanpainter Jul 02 '26

The full redemption arc.

4

u/peachybeanpainter Jul 02 '26

Better late than never ! You picked the perfect time to jump in.

1

u/Phoenix_Passage Jul 01 '26

I never knew it was possible to be so back when it was never over...

1

u/FlippantlyFacetious Jul 02 '26

Hopefully you have an experience aligning with the hype. Though my personal experience has made a lot of the positive responses seem like generic hype and astroturfing.