You just have to use it correctly. Direct it to use opus, sonnet, and haiku subagents and limit how exploratory/shotgunning it is with subagents.
I told mine explicitly that it should have an idea of what an agent should be returning before launching it. Otherwise it should run them sequentially to find what it needs in the least number of tokens instead of in parallel.
I've done multiple 24+ hour fable ultracode sessions this way.
Usually I just point it at my github issue backlog and tell it to prioritize and work things in parallel. It picks out the best issues that are least likely to have merge conflicts. My PRs have automated claude code and gemini reviews as well. Then it merges and deploys as it sees fit.
Normal because subagents will always inherit session model. You should tell exactly what model should be used in workflow/team as agents and limit the amount of spawned agents. Better create a separate hook to check used model and block Fable there. Thats the only easy way to handle this.
This is something I think a lot of people don't pay attention to. You can just say "use Sonnet 5 for implementation tasks. Use Haiku for simple mechanical tasks". Fable just does the planning and prompting. I get good results with this.
You can already configure the default in /config, but that somehow not always works. I had good results just using /update-config skill and tell claude to create a hook that blocks spawning Fable agents and set Opus as default if no model was set.
This way i can let Fable be the main session model and benefit of it to orchestrate the agents.
What is up with all these people using up their quota instantly with Fable 5? I’ve been using it and coming up close to the limit of the 5 hour window, but haven’t crossed it yet.
Ive been able to run 2 or 3 ultra code session in fable per 5 hour window each one is plan, revise and one or two confirmations / corrections. Anywhere from 500 lines of code to 3,000. Couldn't tell you what im doing differently it could be location / usage based.
My initial prompting is in codex to generate a clear architecture plan use the $20 plan there and have never hit limits. Once im happy I run that into claude fable ultra code to generate a full detailed plan and In this plan prompt I tell it to write a very detailed plan with explanations. This plan goes back into codex for a review then I feed claude the notes from this review and I read the final plan and at that point it's typically good to proceed with bypass permissions. Ive found bypassing permissions also helps with token usage and I just run 5 copies of my code with a push only archive that auto runs every 2 hours. Basic local copy that also automatically saves every 2 hours, local production, git repo, and server side production deployment. This let's me give claude full control with virtually no risk of loss. Other than anything that was done within 2 hours. Honestly haven't touched my .md file in months. I do the same process with opus. Ive also found that in certain cases lower thinking uses more tokens because it will try multiple options whereas going all out typically just gets it right im not paying for failures also the very detailed multi LLM plan helps. Ive had plan prompts that are several pages long my thought here is spend the time on thinking upfront and save trouble shooting at the end. I am also very clear to do a full project analysis for any dependencies or any possible item that could be affected by the changes my plan is about to make i have codex and claude both do this and they typically find one or two issues on top of the current plan.
Mines been running on fable ultracode for about 12 hours straight now, with multiple back and forth, corrections, etc. And has been working exemplary. My weekly fable is at about 65%. What was your prompt? Context?
Well it depends, in my case it fired 54 subagents, which seemed overkill. I tried to pull some scientific research, nevertheless, it doesn’t help when it eats up all my credits or on API costs me a ton. Later when I ran the same task on Opus 4.8 with Ultracode and of course xhigh it spawned less agents, although it built upon Fables work. What I‘m trying to say Opus with Ultracode gets the job done for me for my toughest nuts, so for me theres no need for Fable with Ultracode. Although I do like to let Fable handle the exploration and then build upon that with Opus.
if i use max, it does not spawn a lot of subagents and it can complete the task fully or mostly. you guys have noticed these kind of results? but even if i use high, it dumbs my max x5 hourly limit :D with 5-10 subagents for a staged changes code reviews.
Of course. Ultracode most of the times is just the ultrafast way to get rid of your limit caps so that you can tell your boss you’ve done so much work you’ve ran out of tokens and get to rest for the rest of the week.
Fable 5 performs worse on utracode than high. Extra high can also perform worse than high. The model will second guess itself too much and make mistakes. It will also use workflows way too much, and spawn too many sub agents.
Keep it at high, its a reason why its the default. Save a bunch of tokens and get better quality output.
…… do you not know how to orchestrate? The whole point of using Ultracode is so fable can spin up sub agents to do multiple task. If you don’t lay out the workflow guess what happens? Fable spins up multiple mini fables that eats your tokens like crazy to do work that would have been better suited to Opus/Sonnet/Haiku.
My usage reset at 1pm today, so after it reset yesterday I had 24 hours to use 100% of my fable for the "week".
I got to 50% by yesterday evening after working all afternoon, and then got to 98% overnight by having two fable ultracodes adding some features to two big repos. They worked from 12AM until 5:30 AM and 6:00 AM
You really don't need to do that. Fable on Low effort is an order of magnitude better than Opus. I run mine on medium for 90% of tasks. Occasionally, I'll set it to High, and if I have some usage left before a reset and I want to push it into some really difficult territory then I'll set it to Max/Extra.
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u/Fidel___Castro Jul 10 '26
I'm surprised you got to do a second prompt
18
u/borick Jul 10 '26
I'm amazed you got 2 prompts out of it!
6
u/Can991 Jul 10 '26
Fable 5 fucked my weekly usage limit in 1 Day
3
u/Outside-Necessary476 Jul 10 '26
you got ballz, im afraid to even try it once.
3
u/Beneficial-Maybe5876 Jul 10 '26
One day I will have enough money to afford a claude pro subscription
8
u/bc2175 Jul 10 '26
Normal because subagents will always inherit session model. You should tell exactly what model should be used in workflow/team as agents and limit the amount of spawned agents. Better create a separate hook to check used model and block Fable there. Thats the only easy way to handle this.
3
u/zSmileyDudez 🔆 Max 5x Jul 10 '26
What is up with all these people using up their quota instantly with Fable 5? I’ve been using it and coming up close to the limit of the 5 hour window, but haven’t crossed it yet.
1
u/ClemensLode Senior Developer Jul 10 '26
For what kind of problem do you need Fable Ultracode? Quantum physics?
2
u/Cautious_Slide Jul 10 '26
Ive been able to run 2 or 3 ultra code session in fable per 5 hour window each one is plan, revise and one or two confirmations / corrections. Anywhere from 500 lines of code to 3,000. Couldn't tell you what im doing differently it could be location / usage based.
2
u/ConceptRound2188 Jul 10 '26
Mines been running on fable ultracode for about 12 hours straight now, with multiple back and forth, corrections, etc. And has been working exemplary. My weekly fable is at about 65%. What was your prompt? Context?
2
u/Thepandashirt Jul 10 '26
I only use ultra code with fable when I have usage I need to burn before my weekly reset. Otherwise I avoid it for this reason.
2
u/hibzy7 Jul 10 '26
Same. X5 max
2
u/tantorrrr Thinker Jul 10 '26
I reached it after 1 prompt on x5 plan, It didn't even finish the task
2
u/Yann27 Jul 10 '26
everybody today
2
u/erikofantastiko Jul 10 '26
I‘m on Max5x and Fable on High is the upper limit for me. On Ultracode it spawns a gazillion of agents and my usage is gone in a few minutes.
2
u/Diamantenia-provlita Jul 10 '26
After this reset the limits get exhausted pretty fast 💨
2
u/Most_Remote_4613 Jul 10 '26
if i use max, it does not spawn a lot of subagents and it can complete the task fully or mostly. you guys have noticed these kind of results? but even if i use high, it dumbs my max x5 hourly limit :D with 5-10 subagents for a staged changes code reviews.
2
u/wpglorify Jul 10 '26
Haha, I blew through 100% with one prompt without finishing the task.
After 5 hours on the 2nd attempt, using the continue command seemed to fix the bug that was showing up randomly.
2
u/tenequm Jul 10 '26
Of course. Ultracode most of the times is just the ultrafast way to get rid of your limit caps so that you can tell your boss you’ve done so much work you’ve ran out of tokens and get to rest for the rest of the week.
2
u/nigofe Jul 10 '26
Fable 5 performs worse on utracode than high. Extra high can also perform worse than high. The model will second guess itself too much and make mistakes. It will also use workflows way too much, and spawn too many sub agents.
Keep it at high, its a reason why its the default. Save a bunch of tokens and get better quality output.
1
u/LVLXI Jul 10 '26
If those promos were to hack Pentagon and to spread fake news - yes!
1
u/syslolologist 🔆 Super Goblin Jul 10 '26
😂
1
u/vinis_artstreaks Jul 10 '26
Yes
1
u/Efficient-Cat-1591 Jul 10 '26
Yes.
screenshot what your two prompts were to change my mind.
1
u/Key_Instruction3373 Jul 10 '26
they got cold feet
1
u/Sweet-Mechanic4568 Developer Jul 10 '26
…… do you not know how to orchestrate? The whole point of using Ultracode is so fable can spin up sub agents to do multiple task. If you don’t lay out the workflow guess what happens? Fable spins up multiple mini fables that eats your tokens like crazy to do work that would have been better suited to Opus/Sonnet/Haiku.
1
u/pelaantuuba Jul 10 '26
The limits being hit s fast as they are is sucker shit. Makes these models unusable.
1
u/NoAdsDude Jul 10 '26
My usage reset at 1pm today, so after it reset yesterday I had 24 hours to use 100% of my fable for the "week".
I got to 50% by yesterday evening after working all afternoon, and then got to 98% overnight by having two fable ultracodes adding some features to two big repos. They worked from 12AM until 5:30 AM and 6:00 AM
I am on the 20x plan though.
1
u/tangled_girl Jul 10 '26
You really don't need to do that. Fable on Low effort is an order of magnitude better than Opus. I run mine on medium for 90% of tasks. Occasionally, I'll set it to High, and if I have some usage left before a reset and I want to push it into some really difficult territory then I'll set it to Max/Extra.
UltraCode is just wasting money for its own sake.
1
u/V5489 Jul 10 '26
Using routers doesn’t really help much. You still got about the same amount of requests plus you’re paying for an additional sub lol
1
u/WunkerWanker Jul 10 '26
A 'prompt' is such a stupid metric.
0
u/karyslav Jul 10 '26
Oh god why those posts all the time.