Bye bye Fable

Hey folks,

Fable went from “new best model” to “not available” in about 3 days.

Anthropic launched Claude Fable 5 on June 9. Fable was the Mythos-class model for general use but with guardrails. Mythos is Anthropic’s new model only available to select companies becuase they say it’s a cybersecurity risk.

Then on June 12, Anthropic posted that the US government got spooked by a jailbreak found by Fable (which Anthropic claims that other models like GPT-5.5 can also find). The US govt. suspended access to Fable 5 and Mythos 5 for all foreign nationals, inside or outside the US, including foreign Anthropic employees.

So Anthropic’s answer was basically: we can’t do that cleanly, so we’re turning it off for everyone.

Worth reading:

• The government’s side, via David Sacks.

• Armin’s “Americans only” post - if a model is apparently too dangerous, why is the boundary nationality?

• Anthropic is losing the mandate of heaven

But I really like this part from shadcn’s post -

**treat intelligence as borrowed. Use the best model while you have it to make durable plans, specs and implementation notes, then execute later with something cheaper or something you control. - shadcn

Worth reading Simon’s review describing Fable as relentlessly proactive.

Anyway, bye bye Fable, I guess.

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Headlines**

• Software Factory - Factory 2.0 launched and there’s been a lot of chatter recently about building ‘software factories’ - ie build the machine to build the machine, or more simply, create the systems, infrastructure and workflows to produce software with agents. Factory’s co-founder Matan was on the 20VC which is worth a watch.

• Ramp SWE-Bench: coding benchmark created from real engineering problems inside Ramp. Fable 5 > GPT-5.5 ~ Opus 4.7 > Opus 4.8, but each increment in performance comes with a 1.5x the cost.

• Vercel has a new tool, drop.new - It lets you just upload a folder, a zip or a file, and it deploys that as a website or an app. Clearly a way to sidestep GitHub.

• OpenAI now lets you save your Codex rate limits reset. You can then use it anytime in the next 30 days.

• The Information just reported that DeepSeek has raised $7.4B, valuing it at more than $50B. It’s their first funding round, and the CEO himself is the biggest check (~40% of the total funding).

• AI chips keep getting faster, but the infrastructure developers rely on hasn’t kept up. In this piece, Runpod (aka the AI Developer Cloud) explores why the real bottleneck may be the stack around the hardware & what a developer-first approach to AI infrastructure looks like: https://fandf.co/4vQDUT4*

My feed**

• Extend CLI - Give your agent the ability to parse and extract an entire corpus of documents.

• Efecto - design tool with code under the hood so that agents can use the same canvas as you.

• Figma’s Chrome extension now lets you copy/paste websites into editable Figma layers.

• A guide to mastering Codex on Mobile for your engineering work.

• It’s a mistake to call oneself a “non-technical founder”

• Making a human → 10,000 agents “org” work with recursive agent systems.

• Fusion API by OpenRouter- Get multiple models to work on your tasks with a judge model to decide the final answers.

• How I work with coding agents like a caveman.

• React security doctor - Fix security exploits in your React app.

• Sonic-3.5 and Ink-2 - New text to speech and speech to text models from Cartesia.

• A frontier without an ecosystem is not stable. - Satya Nadella

• Castform - bring your data and train open-source models on them without worrying about how to make GPUs work.

• How Fable was probably built.

Afters**

[@mvanhorn, a non-technical founder who has contributed to 100+ open source projects and reached 44K+ GitHub stars despite not ","username":"petergyang","name":"Peter Yang","profile_image_url":"https://pbs.substack.com/profile_images/1454103621516206083/klMwpkk_normal.jpg","date":"2026-06-14T14:15:21.000Z","photos":[{"img_url":"https://substackcdn.com/image/fetch/$s!zIPE!,w_1028,c_limit,f_auto,q_auto:best,fl_progressive:steep/l_play_button_usfui2,w_88,e_colorize:0/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F__ss-rehost__tw-video-preview-13_2066162494859804672.jpg","link_url":"https://t.co/5ZerdHoPQB"}],"quoted_tweet":{},"reply_count":25,"retweet_count":35,"like_count":321,"impression_count":81344,"expanded_url":null,"video_url":"https://video.twimg.com/amplify_video/2066162494859804672/vid/avc1/1280x720/BfcIoOLf1ToI_W-V.mp4?tag=14","belowTheFold":true}" class="pencraft pc-display-flex pc-flexDirection-column pc-gap-12 pc-padding-16 pc-reset bg-primary-zk6FDl outline-detail-vcQLyr pc-borderRadius-md sizing-border-box-DggLA4 pressable-lg-kV7yq8 font-text-qe4AeH tweet-fWkQfo twitter-embed">*Peter Yang@petergyang"I'm not an engineer but somehow I'm able to ship things of value, which is crazy and weird and still blowing my mind."

Here's my new episode with @mvanhorn, a non-technical founder who has contributed to 100+ open source projects and reached 44K+ GitHub stars despite not 2:15 PM · Jun 14, 2026 · 81.3K Views25 Replies · 35 Reposts · 321 Likes]($1)[*Marc Andreessen 🇺🇸@pmarcaYou have asked me how I feel about AI regulation. All right, here is how I feel about AI regulation:

If, when you say AI regulation, you mean the devil’s firewall, the precautionary scourge, the bloody red-tape monster that defiles the innocence of midnight coders in their4:49 AM · Jun 13, 2026 · 546K Views531 Replies · 297 Reposts · 3.18K Likes]($1)[@salesforce to acquire @fin_ai for ~$3.6B. The transaction is expected to close in the fourth quarter of Salesforce’s fiscal year 2027.\n\nFin started as Intercom 15 years ago. We changed our name to cap our transformation ","username":"eoghan","name":"Eoghan McCabe","profile_image_url":"https://pbs.substack.com/profile_images/1761540577563377664/V4PXTjtC_normal.jpg","date":"2026-06-15T12:02:37.000Z","photos":[{"img_url":"https://pbs.substack.com/media/HK2kW82aEAAP4UH.jpg","link_url":"https://t.co/ghD3xGld55"},{"img_url":"https://pbs.substack.com/media/HK2kXrdbwAAVYsY.jpg","link_url":"https://t.co/ghD3xGld55"}],"quoted_tweet":{},"reply_count":563,"retweet_count":202,"like_count":4103,"impression_count":989665,"expanded_url":null,"video_url":null,"belowTheFold":true}" class="pencraft pc-display-flex pc-flexDirection-column pc-gap-12 pc-padding-16 pc-reset bg-primary-zk6FDl outline-detail-vcQLyr pc-borderRadius-md sizing-border-box-DggLA4 pressable-lg-kV7yq8 font-text-qe4AeH tweet-fWkQfo twitter-embed">*Eoghan McCabe@eoghanWe’re excited to share that we just signed an agreement for @salesforce to acquire @fin_ai for ~$3.6B. The transaction is expected to close in the fourth quarter of Salesforce’s fiscal year 2027.

Fin started as Intercom 15 years ago. We changed our name to cap our transformation **12:02 PM · Jun 15, 2026 · 990K Views563 Replies · 202 Reposts · 4.1K Likes]($1)*Peter Steinberger 🦞@steipeteGot a PayPal verification text and thought I been hacked, but it was just codex signing up for a web service it needed.3:18 AM · Jun 14, 2026 · 333K Views131 Replies · 82 Reposts · 4.05K Likes[*Nick Dobos@NickADobosLoops so hot right now Here are the loops I’m experimenting with:

Planners

• morning brief, orient and context switch back into the flow. This pulls from outside data sources and also checks past chat logs to figure out our current progress.
• daily planning
• what did you get*Peter Steinberger 🦞 @steipeteHere's a simple loop: Tell codex to maintain your repos, wake up every 5 minutes and direct work to threads. That makes it easy to parallelize+steer work as needed.

I use a orchestrator skill combined with my triage+autoreview+computer use skills, so some work can land6:16 PM · Jun 11, 2026 · 75.1K Views21 Replies · 22 Reposts · 481 Likes]($1)Share Ben's Bites

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