Can't wait for China to pull ahead so we have an end to this bullshit
Fable 5 will default to Opus 4.8 for coding tasks
21–30 of 33 posts
Re: Fable 5 will default to Opus 4.8 for coding tasks
#22How can it be legal to charge a higher fee for the Fable model, if most of the usage will default to a cheaper model behind the scenes? It is one thing if I, as the user, choose to down-level but Claude shouldn't do this on its own.
Judging from their site, I think it should be OK: "You won't be charged Fable prices for rerouted requests. Learn more about how the fallback experience works." https://www.anthropic.com/claude/fable Under "Safeguards"
And what happens if you also get blocked by Opus?
I couldn't find if they refund the tokens for that session or the customer is SOL.
Re: Fable 5 will default to Opus 4.8 for coding tasks
#23How can it be legal to charge a higher fee for the Fable model, if most of the usage will default to a cheaper model behind the scenes? It is one thing if I, as the user, choose to down-level but Claude shouldn't do this on its own.
Judging from their site, I think it should be OK: "You won't be charged Fable prices for rerouted requests. Learn more about how the fallback experience works." https://www.anthropic.com/claude/fable Under "Safeguards"
This has no mention of what happens to the prompt cache, including the "learn more" link.
Knowing Anthropic, it wouldn't surprise me if it will result in a full cache miss/rewrite at fallback, with potentially up to 1M tokens in the context window.
Re: Fable 5 will default to Opus 4.8 for coding tasks
#24Earlier quoted context omitted.
Judging from their site, I think it should be OK: "You won't be charged Fable prices for rerouted requests. Learn more about how the fallback experience works." https://www.anthropic.com/claude/fable Under "Safeguards"
And what happens if you also get blocked by Opus? I couldn't find if they refund the tokens for that session or the customer is SOL.
You're paying in full for the "guardrails" embedded in the system prompt, prompt injections, refusals, fallbacks and everything else that may be caused by the service provider.
This is the new normal.
Re: Fable 5 will default to Opus 4.8 for coding tasks
#25I must admit I was drawn to Claude because of their (obviously successful with me) publicity stunt about "being too dangerous to make widely available", when Mythos came out. It's a shame because I was really looking forward to use it specifically to find potential security holes in my own software. That being said, Opus 4.7/4.8 have been quite useful already, especially for finding things in the harder to test, non-…
Yeah, I was very excited for Fable to come back to use it for work after using Opus 4.8, but now I guess I'm just excited for Sol/Terra/Luna (unless they have the same restrictions)
It's very likely that OAI models will have even more restrictions. Firstly because now they know what feds will do if you don't tune the safety classifiers towards more false positives and secondly, OAI models were always more restrictive than ANT.
Re: Fable 5 will default to Opus 4.8 for coding tasks
#26This is a testable claim.
Gave it a small coding challenge. It wrote the code just fine.
Re: Fable 5 will default to Opus 4.8 for coding tasks
#27This third-party mirror won't load for me.
That aside, they said "some routine tasks like coding and debugging". Since I'm using it for coding right now and it's notably better than Opus 4.8, I think what they mean is that some coding and debugging tasks will fall back.
Re: Fable 5 will default to Opus 4.8 for coding tasks
#28Earlier quoted context omitted.
Judging from their site, I think it should be OK: "You won't be charged Fable prices for rerouted requests. Learn more about how the fallback experience works." https://www.anthropic.com/claude/fable Under "Safeguards"
This has no mention of what happens to the prompt cache, including the "learn more" link. Knowing Anthropic, it wouldn't surprise me if it will result in a full cache miss/rewrite at fallback, with potentially up to 1M tokens in the context window.
https://platform.claude.com/docs/en/build-with-claude/fallba...
Fable requests that fall back to Opus do not charge the cache miss cost of Opus.
Re: Fable 5 will default to Opus 4.8 for coding tasks
#29Fable is useless, then. What's the point of re-enabling it exactly?
Re: Fable 5 will default to Opus 4.8 for coding tasks
#30This is a misinterpretation. Fable 5's acceptable use policy has false positives during some coding tasks, and that's what they were talking about. But I've been using it for web dev tasks since it relaunched today, and it's worked fine without fallback.
(On a firmware-customization project involving a ghidra MCP, it triggered and switched to Opus; that was sort of expected.)