Fablemaxxing, or how to drain a $100 plan in nine minutes
Anthropic's strongest model is included on paid plans only through June 22, and it spends tokens roughly twice as fast as Opus. Subscribers are racing to use the window before usage credits take over, and the restricted sibling stays behind a velvet rope either way.
Claude Fable 5
tokens in / out
- Class
- Mythos, above Opus
- Access
- General release
- Sibling
- Mythos 5, restricted
- Fallback
- Opus 4.8, <5% of sessions
- Burn rate
- ~2× Opus tokens
- Plan window
- Included through Jun 22
- Retention
- 30 days, mandatory
Today's Art Direction
Phosphor TerminalA market data terminal: amber phosphor quotes on warm black, news as wire rows, one spread chart.
Trading consoles are one of the oldest dark interfaces in computing, and their discipline still holds: a near-black ground, one signal color reserved for live data, and prose kept in a calm neutral so the amber means something when it appears. The page is a grid of labeled panels, the masthead is a session status bar, and every section header works like a terminal function row.
The discipline transfers directly to product work: color-zone by data temperature, so numbers, prices, and codes get the phosphor while reading text never does. A dark theme stops looking generated the moment the accent follows a rule instead of a mood.
Tooling
Primary sources firstAnthropic launches Claude Fable 5 and Claude Mythos 5
Fable 5 is the first generally available model in Anthropic's Mythos class, a tier it places above Opus, priced at $10 per million input tokens and $50 out. Classifiers hand cybersecurity, biology, and distillation requests to Opus 4.8 instead, a fallback Anthropic says triggers in under 5 percent of sessions, and subscription plans include the model only through June 22 before usage credits take over.
anthropic.comFable 5 can drain a $100 plan's daily allowance in under nine minutes
Fable 5 spends tokens at roughly twice the rate of Opus 4.8 in plain conversation, and far faster in the new Workflow mode: BleepingComputer's test burned a million tokens in eight minutes. Call it fablemaxxing: subscribers are queueing their heaviest jobs inside the free window before June 23 turns on the meter.
ghacks.netThe retention string attached to Mythos-class models
The same announcement requires 30 day data retention for all Mythos-class traffic, on first and third party surfaces alike. Bedrock customers noticed, and a Hacker News thread is working through what AWS will now have to share with Anthropic.
news.ycombinator.comClaude Fable 5 lists on Vercel AI Gateway day one
Vercel had the model live on AI Gateway at launch. For where the rest of the market sits, the gateway's June production index shows DeepSeek climbing the token volume charts while Anthropic keeps the largest share of spend.
vercel.comTechnique
How building an HTML-first site doubled our users overnight
A contractor replaced a failed React form with an Astro build that works without JavaScript, validates through a web component smaller than 1KB, and never loses entered data. Completions doubled at launch, largely users the old analytics never saw bounce.
mohkohn.co.ukScroll-driven, scroll-triggered, scroll states, and view transitions
Four scroll-adjacent CSS features now ship with confusingly similar names. CSS-Tricks walks the boundary lines between them so you can pick the right one before reaching for JavaScript.
css-tricks.comWorkflow
An autopsy of Claude Code's deep research
Nikola Balic had Claude Code extract its own deep research workflow from its binary: one scoping pass, five parallel searches, three skeptics voting on every claim, and no second look at anything it finds. His test run spawned 98 agents on a single question, and his conclusion is that the reference harness is wide where the hosted products it resembles are iterative.
steel.devXcode 27's agent skills work in Claude, Codex, and Cursor
Apple ships seven official agent skills with Xcode 27, and one export command makes most of them usable from any agent IDE. Antoine van der Lee sorts which skills travel and which stay device-bound, a practical follow-up to yesterday's Apple AI story.
avanderlee.comPrompt Lab
Paste into your AI design toolToday's idiom as a working brief. It recreates the phosphor terminal, including the one rule that keeps dark themes honest: the accent belongs to data, never to prose.
Design a dark market-data terminal page for a daily design-news briefing. Archetype: a financial trading console rendered as a web page. Ground: warm near-black (#131009), panels in #1B1710 with 1px #3A3220 borders and sharp 2-3px corners. One signal color: amber #FFB000, reserved for live numbers, panel codes, prices, and link underlines; body prose is warm parchment (#F2E9D8) and secondary text is #B5A78D. Type: a condensed engineering display face (Saira Condensed 700, uppercase) for the headline and panel titles, a neutral sans (Public Sans, 19px minimum, line-height 1.65 or more) for prose, and a monospace (Fragment Mono) only for tickers, timestamps, stat readouts, and source domains. Build: a top status bar holding the brand and session metadata as bordered mono cells; a thin ticker strip of real data points from the page itself; a two-column quote board with the lead story on the left and an instrument tile on the right showing genuine numbers as label-value rows; below, a grid of panels titled like terminal functions (WIRE, TECH, FLOW), each news item a wire row with a mono date cell, a linked headline, and one or two sentences of context. Add one abstract phosphor depth-chart plate with no readable text in it. Guardrails: WCAG AA contrast for every label on its actual surface, no neon glow, no gradients, no cyan-on-black, no fake buttons or fake search fields, hover states with about 150ms easing, and a prefers-reduced-motion fallback that stops the ticker animation.
Field Note
The strongest model on the market and the strongest model you can use are now different things on purpose. Plan your stack around the gate as much as the benchmark.
Sources
- Claude Fable 5 and Claude Mythos 5anthropic.com
- Anthropic Releases Claude Fable 5 to Pro, Max, and Enterprise Users Free Until June 22ghacks.net
- AWS Bedrock to require sharing data with Anthropic for Mythos and future modelsnews.ycombinator.com
- Claude Fable 5 now available on AI Gatewayvercel.com
- AI Gateway production index, June 2026vercel.com
- An autopsy of Claude Code's deep researchsteel.dev
- Using Xcode 27's Agent Skills in Claude, Codex, and Cursoravanderlee.com
- How building an HTML-first site doubled our users overnightmohkohn.co.uk
- Scroll-Driven, Scroll-Triggered, Scroll States, and View Transitionscss-tricks.com