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 — Anthropic
Claude Sonnet 5.5 is a model from Anthropic, released on September 28, 2026, which Anthropic describes as its best combination of speed and intelligence. It takes text and image input, returns text, and supports adaptive thinking; Anthropic names it the replacement for Claude Sonnet 4.5.
Model B — Reflection AI
Beam is Reflection AI's first open-weight model, a 501B-parameter sparse mixture-of-experts model with 23B active parameters, built for coding, reasoning and agentic work. Announced on October 5, 2026, its weights were released on Hugging Face under Apache 2.0; it takes and returns text only.
| Property | Claude Sonnet 5.5 | Beam 1.0 |
|---|---|---|
| Released | Sep 28, 2026 | Oct 16, 2026 |
| Developer | Anthropic | Reflection AI |
| Type | multimodal | llm |
| License | proprietary | open-weight |
| Context window | — | 1,000,000 |
| Parameters | — | 501B total, 23B active (sparse mixture of experts) |
| Developer status | — | — |
| Input $/M tokens | $2.00 | — |
| Output $/M tokens | $10.00 | — |
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=claude-sonnet-5-5&b=reflection-beam. CORS is open. Citation guidance: /about/editorial-process.