Reading up on Fable
20 deep · digging since jun 10
- Fable's judgement
The author learned to let Claude Code's Fable model use its own judgement to delegate coding tasks to lower-power models, improving efficiency and token usage.
- You're Spending Too Much on AI. You're Also Using Too Little.
Companies overspend on AI by using costly frontier models for routine work, needing better defaults, outcome-based measurement, and cultural efficiency incentives to unlock far greater value.
- Anthropic’s Safety Superpower – Stratechery by Ben Thompson
Anthropic's genuine belief in safety licenses it to prioritize business interests and challenge the U.S. government.
Takes
this has 0 manual edit and was done by Fable with Revid MCP crazy simple to use the MCP 👇 https://www.revid.ai/mcp
@tibo_maker
I had Fable build another thing I always wanted, a full procedural fantasy kingdom generator with economics, trade routes, population growth, wars, lineages, and occasional dragons. First, I worked with it on a plan, then it made it. You can play it here: https://annals-kingdom.netlify.app/
@emollick
I had early access to 5.6/Sol for ~month. Sol is my default. It is faster, plans/judges just as good as Fable, and I think produces better overall work. I’ll reach for Fable still for highly targeted debug or performance work with clear reward functions. A cheeky way I describe Sol vs Fable to my friends is that Sol is a charismatic, efficient, talented coworker you’re jealous of. Fable is a genius recluse that is brilliant at its fixations but doesn’t go out, doesn’t date, and you don’t want to hang out with them much lol. Fable is undefeated at highly targeted debug/security/performance goals. It’s a sight to behold and I was never able to get Sol to push as hard in this category. I’ll keep using it for this. Sol is better or comparable at everything else, in my experience. Give it a shot, it’s hard to describe but it’s just more enjoyable to work with. (Disclaimer I have no financial ties to either lab, wasn’t paid for any of this.)
@mitchellh
If you run this workflow, ask Fable to make codex the workhorse. https://github.com/steipete/agent-scripts/blob/main/skills/codex-first/SKILL.md
@steipete
What The New 100x Agentic Engineer Looks Like In The Era Of Fable & GPT 5.6
@systematicls
I built an engine for Fable to create its own self-improving NPC town with @threejs and it's actually doing it lol. Literally shipping its own PRs to advance the story and lore. Crazy.
@gill_works
Fable is pure magic. I wanted a beautiful app to explore ocean wildlife. Fable built this in an hour. It generated videos with Seedance and carefully synchronized them to make these absolutely insane transitions. I've never seen anything like this in an app. Unreal.
@anshuc
Fable 5 is so good at web design that I genuinely don't see how web design careers make it past the end of this year. An AI that can one shot designs this good means that the web design industry as a whole is in serious trouble. If you're in web design, it's time to pivot.
@markgadala
I’ve found the most important part of working with Fable is discovering my own unknowns so I can prompt it better, heres how I do that.
@trq212
The Window Has Closed
@AndrewCurran_
The Physics of a Fable
@Rafa_Schwinger
You should basically never use Fable for coding, but instead use it as a planner/orchestrator. Most of today's advanced models can implement a spec perfectly, and once done you can send the work to Fable to review. This has been my most powerful flow so far.
@skirano
oh ok i get it. imagine you have a staff engineer working on a basic CRUD saas. and they complain year after year you're not working on enough tech debt and nothing is ever prioritized right. and then they propose the most opaque, overwrought example of backend performance issues, and try to convince your ceo that you should stop all product development and put 100% of your engineers on fixing your flaming dumpster fire of a monorepo. and every year you say no, because their proposals are intractable, completely untied to business metrics, and "no customer will care." now pretend you can put that person in a back room and ignore them for a few days, and they come back and secretly ship everything that was wrong in your repo. your app is now blazing fast and you are at bug zero. that is how you should use fable. (just don't put him in a meeting, and don't let anyone read his docs)
@clairevo
Lots of people asked how I used Fable to edit its own launch video so I made a video about that! TLDR it wrote a lot of code & tool calls to use transcription services, ffmpeg, do colorgrading, use the figma mcp, make remotion UI and render it. I didn't touch a video editor.
@trq212
Fable is a good model. As with all new models, it is simultaneously excellent and entirely unremarkable (relative to other models). It is slow and expensive, and the "loops are all you need" discourse they are pushing is obvious in the context of someone using Fable-class models What I've found so far is that for broad scope design (code architecture) tasks, Fable is unremarkable. Or, not better enough to justify its cost and speed. But in highly targeted goal-oriented loops, it is another beast entirely. It is very slow but produces very good results. I let it churn on optimizing a SwiftUI-layout resolver in Go I wrote and it was able to bring it down to an order of magnitude I could not reach myself (micro => nanosecond scale). But it took 2 hours and $40 to do it and I had to claw back some changes it overfit to Apple Silicon. Still, very worth it. In comparison, for "implement this feature/change" iterative work, I ran head-to-head Fable vs GPT5.5 vs. GLM-5.1. They all produced equally acceptable final results, but GPT5/GLM did it in a couple minutes and Fable was churning away for 40 minutes. And GLM cost me less than a dollar, GPT5.5 ~$1.50, and Fable cost $9. You can see that in this context, interactively working with an agent is nonsense. Its too slow. You need to write loops to keep the agent working and you probably want to highly parallelize the work being done. As with all things, I think a balance makes sense... My sense is that I'd reserve Fable for targeted, surgical analysis and work. Not for daily driving everyday tasks. I'm going to keep spending a shitload of money (relatively) and maining Fable for the rest of the week to continue to judge, will report if anything changes. I'll continue to head-to-head as well.
@mitchellh
How are you guys feeling about Fable so far?
@theo
I gave Fable this tweet and let it crank in ultracode. It created a fully functioning multiplayer markdown editor with obsidian style editing, version history, sharing with email invites, cli sync with a skill, image support, deployed it to cloudflare and bought a domain.
@sawyerhood