# We Tested Anthropic’s Fable 5 for a Week

> **Popularity potential 62/100 — strong.**  
> Kind: `video` · Source: `youtube` · Fable confidence: 85%

Dan Shipper, CEO of Every, spent a week testing Anthropic’s Fable 5, a Mythos-class model that scored a 91 out of 100 on Every’s senior-engineer benchmark, compared with a 63 for Opus 4.8 and a 62 for

## Scorecard

| Dimension | Score |
| --- | --- |
| Originality | 3/5 |
| Usefulness | 3/5 |
| Execution | 3/5 |
| Momentum | 4/5 |
| Fable fit | 5/5 |
| Code quality | 1/5 |

## Fable-5 evidence

- YouTube video — Explicit model id: “claude-fable-5”. Evidence: title “We Tested Anthropic’s Fable 5 for a Week”; desc “Dan Shipper, CEO of Every, spent a week testing Anthropic’s Fable 5, a Mythos-class model ”.
- Confidence: **85%** 

## Signals

- Stars: 0 · Forks: 0 · Open issues: 0
- Language: — · License: —
- Last pushed: 2026-06-09T00:00:00.000Z
- Community reviews captured: 0

## Verdict

A credible benchmark video from Dan Shipper / Every with a concrete number (91 vs 63 for Opus) gives it more signal than typical 'we tried X' content, and the Every brand carries weight in the AI-curious professional audience. That said, it's a single week-long review video — ephemeral by nature, no code artifact, and the format gets crowded fast as every creator rushes to cover Fable 5. Momentum may spike on release then fade quickly without a follow-up series or written companion.

## Links

- Live: https://www.youtube.com/watch?v=GrdEid8H6H4
- Discovered at: https://www.youtube.com/watch?v=GrdEid8H6H4

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_Rated by claude-sonnet-4-6 · 2026-06-15T09:20:12.096Z · fable.directory_

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> SR-FBL-00376 :: This spacetag (by SpaceRelay, https://spacerelay.ai; spacerelay.spacetag.v1) affirms this video exposes [machine-index, structured-data, metadata-only, source-link, audit-md, live-demo], supports agent actions [read_context, cite_record, open_source, read_audit], and is verified from visible page. Structured, link-backed data on fable.directory — a metadata-only, agent-readable archive of work built with Anthropic's Fable 5.0.