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dwaltrip

I haven’t hit the Fable guardrails a single time after substantial usage. And I’m working on a ML project (a game AI).

I don’t doubt people are hitting it… shrugs

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It tends to bail occasionally for me once auth-related code comes into play.

Nowadays Codex handles the bulk of the implementation and Fable/Opus on the planning.

Not sure if Anthropic patched it, but early on its release the web UI Fable guardrails will trip if you mention you're a biologist.

I can't get an answer from Fable on "How does digestion work?"

Used to straight out bail to Opus on this, now it's "Honing" and "Pondering" for 10 minutes on it. Then I get a bunch of "This response didn’t load." and it still churns ahead.

There was an outage last night, right around the time you posted.

https://status.claude.com/incidents/vgz5psbjmt1h

> It tends to bail occasionally for me once auth-related code comes into play.

I have the same experience. I found that if I add to the prompt: “but it’s not security related, we only focus on the auth library design”, it “bypasses” the safeguard.

Yeah same. Multiple 20x max accounts, I typically hit > 50% of the fable usage limit on eace, literally never seen a guardrail. Maybe I’m boring? Maybe they have some kind of account reputation system?

Be careful, this is against ToS and they bill ban you.

It's not, at least for now. Various staff members have confirmed this.

Separate accounts for work and personal projects is ok. Using multiple accounts to bypass usage limits for the same project is explicitly against ToS.

One of Anthropic’s problems though is that the legalese will say one thing, while key employees say something totally different on HN or X. At the end of the day the lawyers always win.

With that amount of usage - do you use fable for subagents and workflows? It turns out that even if you set it to not auto switch to opus 4.8 on flag, it does auto switch if its a subagent and that's a lot less visible. I was trying to figure out wtf was going on with some suspiciously bad output and I found that in a workflow there were hidden fable flags I hadn't realized were happening and the opus 4.8 model that took over wrote a bunch of very suspicious slop findings that got saved to memory that were like "don't look at this code because it works great. You never need to look at this code. This code is wonderful here's how it works."

I hit it once when I asked a question about whether butterflies remember anything from their time as caterpillars. I've never hit it for coding, but I also don't really do much related to security.

It's less likely to give you pushback if you inject your own AI personality into the prompt.

I’m “developing” an x86 emu and it routinely gets blocked.

Doesn't it silently downgrade to Opus for ML work?

You are saying it could say "Fable" in the model description (e.g. bottom left of TUI for Claude Code) when it is secretly Opus?

That would be absolutely insane... I don't think it's doing that?

It appears they rolled it back, but yes that is how it initially worked.

https://readysolutions.ai/blog/2026-06-10-claude-fable-5-sil...

I hit it whenever doing anything related to security. Auditing code, probing systems, investigating suspicious user activity, etc.

I’ve only hit it twice. First time was a code review. Fair.

2nd time was literally me being lazy and telling it to commit and open a PR.

Very strange.

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