[BUG] Fable is not available

@anthropic ^

Fable 5 & Mythos 5 have been disabled for all users. Anthropic was forced to do this by the US government:
https://www.anthropic.com/news/fable-mythos-access

so, why is Opus not working anymore?!?

● API Error: 400 tools.13.model: Claude Fable 5 is not available. Please use Opus 4.8.

this is after I tried switching to Opus 4.8 ?!?!?

@anthropic

The United States will lose. China will create millions of copies, and another community will make one equal to or even better than Fable 5. Anthropic will lose...

Does anyone find it funny that Fable rhymes with Sable from "If Anyone Builds It, Everyone Will Die"

Hm, but other models works

this is all i am getting after downgrading to opus 4.8:

● API Error: 400 tools.13.model: Claude Fable 5 is not available. Please use
Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/model
⎿ Set model to Opus 4.8 (1M context) and saved as your default for new sessions

❯ continue

● API Error: 400 tools.13.model: Claude Fable 5 is not available. Please use
Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access

@pm0code I'm guessing that it's a transient issue due to the sudden shutdown of Fable; I'm able to use Opus 4.8 fine with Claude Code

Fable 5 was originally scheduled to be included in the subscription through June 22, but what happens after access is restored?

his is all i am getting after downgrading to opus 4.8:

same bug with fresh new session :

• fable : down by us
• opus : Error 400
• sonnet : Error 400
• haiku : error 400

...

@suzukimain Unclear, but my guess is that Anthropic will take care of their customers. All of my limits just reset; I had used nearly 100% of my Max 20x limit on Fable and now it's down to 0.

@mortifia @pm0code try restarting your session, that solved it for me. /exit then claude --resume (or start a new session)

@ashprograms, that is great, but if nothing is available, limits mean 'nada' ;)

@mortifia @pm0code try restarting your session, that solved it for me. /exit then claude --resume (or start a new session)

with fresh new session

<img width="1094" height="425" alt="Image" src="https://github.com/user-attachments/assets/56976c34-31ab-44e6-a215-99a8bf19397f" />

@ashprograms , i have done it 4 times already :(

PS D:\AAAA> claude
▐▛███▜▌ Claude Code v2.1.177
▝▜█████▛▘ Opus 4.8 (1M context) with high effort · Claude Max
▘▘ ▝▝ D:\AAAAA

❯ continue

● API Error: 400 tools.13.model: Claude Fable 5 is not available. Please use
Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access

for the one blocketd with API 400 (@pm0code )

the bug is due to advisor config !
set the advisor to opus

<img width="1042" height="547" alt="Image" src="https://github.com/user-attachments/assets/53476a6a-23ce-4e49-af1b-4536cd28cd9a" />

<img width="767" height="230" alt="Image" src="https://github.com/user-attachments/assets/76887d08-07eb-4eac-b634-11025d705671" /> Got this message

for the one blocketd with API 400 (@pm0code ) the bug is due to advisor config ! set the advisor to opus <img alt="Image" width="1042" height="547" src="https://private-user-images.githubusercontent.com/22671054/607451028-53476a6a-23ce-4e49-af1b-4536cd28cd9a.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3ODEzNDQ4MDksIm5iZiI6MTc4MTM0NDUwOSwicGF0aCI6Ii8yMjY3MTA1NC82MDc0NTEwMjgtNTM0NzZhNmEtMjNjZS00ZTQ5LWFmMWItNDUzNmNkMjhjZDlhLnBuZz9YLUFtei1BbGdvcml0aG09QVdTNC1ITUFDLVNIQTI1NiZYLUFtei1DcmVkZW50aWFsPUFLSUFWQ09EWUxTQTUzUFFLNFpBJTJGMjAyNjA2MTMlMkZ1cy1lYXN0LTElMkZzMyUyRmF3czRfcmVxdWVzdCZYLUFtei1EYXRlPTIwMjYwNjEzVDA5NTUwOVomWC1BbXotRXhwaXJlcz0zMDAmWC1BbXotU2lnbmF0dXJlPTQ0YzdiMmEzYWYwNTQzMzZjOWVmODA3ZDU3ZjIwZTU0YzUwMjdhZWViOWRjOTczZjQzMGU0ZTAxMDM4Mzg5ZTAmWC1BbXotU2lnbmVkSGVhZGVycz1ob3N0JnJlc3BvbnNlLWNvbnRlbnQtdHlwZT1pbWFnZSUyRnBuZyJ9.5kfptLNglnBhC1Owqybs9cM1N6VfgGYfqzXd9tsEZ6o">

Can confirm, use /advisor to switch to anything but Fable 5 model and you will be fine.

+1

+1 from Japan, Claude Max 5x, Tokyo. Fable 5 disappeared from /model on 2026-06-11 and has not returned.

The reason this matters more than a normal feature gap: the official escape hatch for the Opus 4.8 tool-corruption regression (#63604, #62467, #66112, #64977, etc., dating back to 2026-05-26) was "use Fable 5." Removing Fable 5 from a paid region while Opus 4.8 is mid-regression and Opus 4.7 is also showing the early form of the same failure is not a graceful degradation — it's a closed exit.

If this is an export-control or compliance hold, at minimum:

1. Say so explicitly in /model output instead of silently hiding the option (current behavior reads as a bug).
2. Document a supported fallback for JP Max subscribers that isn't "live with the regressed model."

The product is unusable for some real client-delivery workflows right now. Three weeks is a long time on a flagship paid tier.

The timing of this error on v171 matches the sudden cloud-level export control directive that forced Anthropic to pull the direct Fable 5 API string from their standard endpoints. Since the official CLI is hardcoded to handshake directly with their disabled endpoints, it throws a connection failure. Interestingly, the model is still fully accessible globally via third-party aggregators and OpenRouter proxies. Are you planning to build a custom proxy wrapper into your terminal profile to pipe the alternative route back into your workspace, or is this disruption forcing a pivot toward desktop environments that let you switch endpoints natively without changing your entire environment variables?