Claude Fable 5.1 (Max, Default Fallback) vs K2 Horizon 0.9B

Claude Fable 5.1 (Max, Default Fallback) vs K2 Horizon 0.9B. A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

AnthropicClaude Fable 5.1 (Max, Default Fallback)Off the frontier
Intelligence
53.40
Total cost
$13129
Institute of Foundation ModelsK2 Horizon 0.9BNot ranked · benchmark data missing
Intelligence
3.00
Total cost
-
Verdict

Comparison incomplete

A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

MetricClaude Fable 5.1 (Max, Default Fallback)K2 Horizon 0.9BDifference
Intelligence (higher is better)53.43.0−94.4% K2 Horizon 0.9B is 94.4% less intelligent
Total AA cost (lower is better)$13,128.86Not reported— not comparable
End-to-end time (lower is better)201.53sNot reported— not comparable
Price per 1M tokens (in / out)$10.0 / $50.0—
Input modalitiesText, ImageText
Open this matchup in the interactive pickerClaude Fable 5.1 (Max, Default Fallback): what beats itK2 Horizon 0.9B: what beats it
Matchup

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Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-fable-5-1/k2-horizon-0-9b · Markdown: /api/v1/compare/claude-fable-5-1/k2-horizon-0-9b?format=md · llms.txt · agent skill