Systems engineer Yacine reports a single prompt run on the Fable platform cost him over $130
Story Overview
Systems engineer Yacine shared that a single prompt fed into Anthropic's Claude Fable 5 model has already piled up more than $130 in API charges, illustrating how the new frontier model handles extended agentic tasks that generate massive token volumes and long runtimes.
Agentic tasks inflate bills fast
Fable 5 targets the toughest planning and multi-step workflows that cheaper models cannot tackle, which explains why costs scale with duration and output tokens rather than any fixed per-prompt fee.
Duration still unknown
Midjourney founder David Holz replied by asking how long the prompt had been running, leaving open whether caching or other optimizations were applied in this particular case.
Many users dismissed Fable as not worth using after reports of a single prompt costing over 130 dollars and quickly exhausting token allotments.
No Digg Deeper questions have been answered for this story yet.
Most Activity
@yacineMTB how long was it running for?
A single prompt with fable has cost me over 130$ so far
@yacineMTB e/greed
@yacineMTB
@yacineMTB he asked it how many r's in strawberry
@yacineMTB if you ask it about the nature of the universe, it's going to take a while fam
@yacineMTB Yes a simple 30 minute prompt of fable for me was $60
@yacineMTB a single prompt to opus cost me my sanity so far
@yacineMTB i used 5.5 High for 14 hours yesterday for less than $1.
@yacineMTB i thought you didnt like anthropic
@yacineMTB Yeah Fable lights your money on fire and I don't think it's proportionally that better
@yacineMTB i had no usage left and though maybe the extra usage credits where a decent option. bu 50$ in 10mins of one prompt? I dont want to think about api cost
@yacineMTB It's hyper expensive. Seems to be a good clip ahead of opus 4.8. it's marginally better than opus 4.6
@yacineMTB dont use it, backboard with opus 4.8 is better: https://github.com/Backboard-io/Backboard-R-CLI-Terminal-Bench-2.1-Results
@yacineMTB This isn’t rent seeking from Anthropic, it’s servitude.
@yacineMTB Fable is gonna cause the world economic to collapse
@yacineMTB I'm never paying for it once my subscription is done. I've gotten legit work out of it but it's definitely possible to imitate it with cheaper systems in place for dedicated roles
@yacineMTB No way tokens at these prices are ever profitable.
@yacineMTB I honestly don't think Fable is worth it. Not now being nerfed as much as it is, and switching to Opus as soon as you ask for anything interesting.
@yacineMTB Remember when those old models (r1, r3 or whatever they were called) were super expensive? Now we laugh at them. Hype will always be cringe if you look back. Wake up people and just contribute to open source so that there will be true intelligence without hype
@yacineMTB How long has it worked?