Opus 5.5 is here! 🎉 It's honestly such a nice model to work with. Feels like Fable, but ~30% faster and ~40% cheaper per task than Opus 5. Go try it out!↗

Has anyone yet tried to get Astra and Fable to agree on the perfect styleguide? And then host it somewhere with a web mcp.↗

I have tested GPT-6 Astra this week. It is a show horse, not a workhorse. Super fun to use and showy, does crazy good stuff, and design-wise it's the most interesting model I've run. But I don't know if I'd use it for a real day to day engineering/product work. It's not as trustw…↗

BREAKING: OpenAI just dropped GPT-6 ASTRA!!! 🚀✨ We’ve been testing it extensively at @every across coding, writing, and knowledge work. My take: it’s a big upgrade from 5.6-Sol, with some frustrating habits that keep it from matching Fable at the top end. Here’s your vibe che…↗

PSA if you're using Claude Code within @get_bb_app: BB uses a local proxy, so Claude Desktop's “load tools when needed” setting doesn’t carry over to BB-launched sessions and Claude loads every MCP tool schema upfront. For me, that meant 167k tokens already filling the context…↗

loving have @paper + fable make variant sheets↗

fable one-shotted the most awesome building manual↗

Fable is really good at launch videos It essentially one-shotted this video. I told it to read my launch post and create a launch video. That's it. It ran for 46 minutes (without asking me any questions), found all the product logos, and spit this out. I then asked it to add…↗

i had fable crawl bitsaver to find design and diagram inspiration and put it into a moodboard for me in tldraw offline↗

my new favorite of way of using fable: step 1. ask it to write a plan step 2: "please get second opinions from codex CLI using gpt-5.6-sol @ max effort and kimi CLI using kimi 3. Revise your plan with any sound findings. repeat until convergence or up to 5 rounds."↗

🎙️ 🚨 Latest State of Agentic Coding w/ special guest @mariozechner (Flask) is out: - Vibe-checking Fable & GLM 5.2 - @mitsuhiko teaches us RL - How harnesses smooth out model jank - Loops, surviving AI fomo, and more Also on YT & Spotify ⬇️↗

New skill: /improve-animations Inspired by @shadcn’s improve skill I made one specifically for animations. Use your most capable model to audit animations in your project and hand the execution to cheaper models. Fable is available through July 12, so make good use out of it!↗

BREAKING: GPT-5.6 Sol is out—AND Codex has been merged into ChatGPT Desktop as ChatGPT Codex. This combo model and desktop app harness are the gold-standard for knowledge work in AI. 5.6 is powerful, fast, half the price of Fable, and my default for almost everything. We’ve b…↗

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: …↗

We've usually stayed away from model comparisons but 5.6 vs Fable is a unique situation We've never had a case where the team is so completely convinced on which one is better Here's the timeline of our experience with it - We test early versions of 5.6 for a couple of weeks a…↗

FIFA World Cup 2026 for NES, brought to you by Fable↗

Don't make the same mistakes I did. Here's a video on how to get the most out of Fable, full of real world examples of Fable helping me ship.↗

You will thank yourself for sending this prompt to Fable: "Read this article and let me know what you would recommend doing off the back of this, whether it's sending things to [project]'s codebase to investigate stuff, asking me questions, or whatever else you recommend. Whethe…↗

After achieving a crazy amount this weekend with a few prompts in the morning, building full-stack apps feels solved now with Fable+Codex. Here's a skill I've affectionately named 'cook': gist.github.com/dctanner/54c57…↗

I spent a LOT of time through the hardest 3D prompts at Fable, it is a 45 min video, but I have 60+ very cool demos for you. Also prompts in the next post. youtube.com/watch?v=rTc2_-…↗

The most interesting Fable tip I've heard so far is to let the model use its own judgement as much as possible I told it "For all coding tasks use your judgement to decide an appropriate lower power model and run that in a subagent" and it seems to be saving a lot of tokens↗

fable produced 60+ (!) ready to merge prs for @mainframe overnight. here's how you can set up a software factory using fable as an orchestrator. prompt included! 1. narrate your *entire* todo list — everything that's top of mind — using dictation. i used @usemonologue and my p…↗

two handy skills on this, our resurrection of fable day: 1. baton is a handy way to transfer context from one agent to another: github.com/blader/baton 2. arbitrage tells fable to plan and validate but use codex to write code: github.com/blader/arbitra…↗

HOLY FUCK time travel debugging for React apps thanks to Fable (with ONLY client side JS, no modifications to the web app itself)↗

A fundamental problem with extending Codex/Cowork/Code to all knowledge work is that they remain very "software-brained" where the end result (the software) is what is important & that code serves as a source of truth. For a lot of other knowledge work, the process is at least a…↗

A new, more capable version of Mythos has emerged from training. I don't know whether it will be called Mythos 5.1 or Mythos 6, or if Anthropic will keep it internal to accelerate further development - but it has arrived. Stopping models like Fable 5 or Mythos 5 from being serve…↗

Bad news: Fable is gone. Good news: you can use Composer 2.5 with pretty much any harness you want now.↗

I’ve had a number of conversations with folks inside and outside government about the current situation with Anthropic, and here is what I believe to be true: — As we know, Anthropic publicly released its Mythos class models earlier this week under the commercial name Fable.…↗

Anthropic is losing the mandate of heaven ## Four months ago, in early February, Anthropic was the darling. OpenAI was the dominant behemoth to root against. Over the last 1-2 years, we'd seen the Sam ouster / return drama, Ilya and Mira had left, the company had raised $40B, h…↗

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.↗