AI Model Comparison
Side-by-side comparison of pricing, context window, benchmarks, capabilities, and license. Every figure comes from the developer's own pages, last checked on ; each model's page lists its sources. A figure we could not source shows as a dash.
Model A — Aleph Alpha
Kolibri is a mixture-of-experts reasoning model from Aleph Alpha for German and English, released on October 3, 2026 and built for public administration and industry, with deployment on customer-controlled infrastructure. It supports a reasoning mode and tool calling.
Model B — Anthropic
Claude Fable 5.1 is Anthropic's model for demanding reasoning and long-horizon agentic work, released on September 1, 2026, and extends Claude Fable 5 at the same input and output prices. It takes text and image input, returns text, and uses adaptive thinking that is always on.
| Property | Kolibri | Claude Fable 5.1 |
|---|---|---|
| Released | Oct 3, 2026 | Sep 1, 2026 |
| Developer | Aleph Alpha | Anthropic |
| Type | reasoning | reasoning |
| License | open-weight | proprietary |
| Context window | 1,048,576 | — |
| Parameters | 78B total, 3.46B active per token (Mixture-of-Experts) | — |
| Developer status | — | — |
| Input $/M tokens | — | $10.00 |
| Output $/M tokens | — | $50.00 |
Bold green values indicate the winner on that dimension where comparison is meaningful (lower price wins; bigger context wins; more open license wins; newer date wins). Prices are the ones each developer lists today; a model it no longer prices has none.
No exclusive capabilities
Programmatic access available at /api/ai/compare?a=aleph-alpha-kolibri&b=claude-fable-5-1. CORS is open. Citation guidance: /about/editorial-process.