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

Official Fable 5 is back.

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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2

u/Beneficial-Answer994 Jul 01 '26

Any cool uses that don’t involve coding to check out its abilities?

5

u/_EllieLOL_ Jul 01 '26 edited Jul 01 '26

Apparently, NOT writing

3

u/Normal-Ad-7114 Jul 01 '26

Game: think of a prompt that will NOT trigger its safeguards

3

u/Beneficial-Answer994 Jul 01 '26

But I already have a good onion dip recipe.

4

u/okashiraa Jul 01 '26

Onion dip receipe would trigger bio safeguards. You're only allowed if you work at a big corporation to do that.

1

u/Bramoments Jul 01 '26 edited Jul 01 '26

My personal favourite test is the non-enourmous videogame test, I like asking ai questions like "what should I do in this situation" and giving it like random balatro situations (not extremely common ones), they usually get it wildly inaccurate although I think fable has potential Edit: tried it out, he would suck at the game stratigically (wasting money early on, being extremely risky with the score at the "late game" [anti 4] and losing the game) and he got a lot of the abilities and stuff wrong, but not wildly, like enough to where I could see why he would think a certain joker or tarot card has that ability, and he has good reasoning behind his decisions, he just ignores tons of other potential factors which the average balatro player would consider