Model evaluation
Claude Fable 5.1
Example data. Replace after first real run.
Ships clean copy with minimal edits. Best for long-form content.
7 Ships
1 Skips
4m Avg edit
$0.12 Cost/task
94% Agreement
Evaluated
Task Results
Blog Post
ShipLong-form content for SEO and thought leadership
Accuracy Coverage Grounding Reasoning Alignment Style Tone
Landing Page Copy
ShipConversion-focused page copy with CTAs
Accuracy Coverage Grounding Reasoning Alignment Style Tone
Email Sequence
ShipMulti-touch nurture or onboarding emails
Accuracy Coverage Grounding Reasoning Alignment Style Tone
Social Thread
ShipLinkedIn or X thread for engagement
Accuracy Coverage Grounding Reasoning Alignment Style Tone
Ad Copy
ShipPaid social and search ad variations
Accuracy Coverage Grounding Reasoning Alignment Style Tone
Case Study
SkipCustomer story with metrics and quotes
Accuracy Coverage Grounding Reasoning Alignment Style Tone
Sales Deck Outline
ShipSlide structure and talking points
Accuracy Coverage Grounding Reasoning Alignment Style Tone
Product Description
ShipFeature pages and benefit copy
Accuracy Coverage Grounding Reasoning Alignment Style Tone
Rubric Breakdown
How Claude Fable 5.1 performed across the seven evaluation areas.
Accuracy Facts, numbers, and claims check out
88% Coverage Hits all the angles the task requires
100% Grounding Stays in scope without inventing details
88% Reasoning Logic flows and arguments hold up
100% Alignment Follows the brief and brand guidelines
100% Style Reads like a human wrote it
88% Tone Matches the voice and audience
100%