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 — OpenAI
GPT-6 Astra is a reasoning model from OpenAI, released in the API on September 3, 2026, which OpenAI describes as its most capable API model for complex reasoning, coding, computer use, research and document creation. It takes text and image input, returns text, and has an April 30, 2026 knowledge cutoff.
| Property | Kolibri | GPT-6 Astra |
|---|---|---|
| Released | Oct 3, 2026 | Sep 3, 2026 |
| Developer | Aleph Alpha | OpenAI |
| Type | reasoning | reasoning |
| License | open-weight | proprietary |
| Context window | 1,048,576 | 1,050,000 |
| 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.
Programmatic access available at /api/ai/compare?a=aleph-alpha-kolibri&b=gpt-6-astra. CORS is open. Citation guidance: /about/editorial-process.