/AI4h ago

Notion integrates Claude Fable 5 to power custom agents after it topped internal multi-step benchmarks

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Original postIvan Zhao#1296
Notion@NotionHQ

Long story short: Claude Fable 5 is now in Notion.

It's the model we'd put behind your most complex custom agents and workers. It set new highs on our internal benchmarks for the hardest multi-step work.

Available on Biz and Ent plans.

10:21 AM · Jun 9, 2026 · 73.8K Views
Sentiment

Positive users are excited about Notion integrating Claude Fable 5 for custom AI agents because of the opt-in model and clear transparency on data retention, while some object to sharing their pages with Anthropic.

Pos
66.7%
Neg
33.3%
3 comments with sentiment.
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Notion@NotionHQ

One thing to know: By default, Notion uses LLMs that do not retain data. But unlike other models, Anthropic retains data for Fable 5 so they can catch risks that only show up across many requests.

That's why Fable 5 is opt-in. Admins can enable it in Settings → Notion AI.

4hViews 2KLikes 17Bookmarks 2
MirAI News@MirAI_Newz

@NotionHQ @claudeai Isn't it a bit too overpowered for notion usual use cases?

4hViews 163Likes 3
Ezuil@Ezuilco

@NotionHQ @claudeai WTF!!!! Really unexpected

4hViews 124Likes 2
Harrison Fan@HarrisonFan0712

@NotionHQ @claudeai Nice call making Fable 5 opt-in and spelling out the retention tradeoff clearly. That kind of model-by-model transparency makes rollout decisions much easier for admins.

4hViews 59Likes 2
Jeston Lu@jestonlu

@NotionHQ @claudeai Oh baby

4hViews 99Likes 1
Techinfo 𝕏@Techinfovibes

@NotionHQ @claudeai Why is it grayed out

4hViews 78
Vic Zhang@RealVicHere

@NotionHQ 即便 LLM Provider 承诺不保留,但偶尔也会

4hViews 61

@NotionHQ @claudeai Fable and Grug could create the best bedtime story.

4hViews 54
beep beep boop@beepbeepbop50

@NotionHQ Aw man I don't want to give Anthropic all my pages :(

4hViews 35
Leon Lin@LexnLin

@NotionHQ @claudeai bro wait do we have like limits?

3hViews 28
Solstice Emporium@SolsticeEm73365

@NotionHQ @claudeai please open for trials accounts

4hViews 23
SM@MomentSupe52108

@NotionHQ This model is not available for workspaces on trials You can enable this model after your workspace trial ends.

4hViews 14

@NotionHQ @claudeai Keep your LLMs & agents secure! https://github.com/OraclesTech/guardian-sdk

4hViews 2