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 — 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.
Model B — Upstage
Solar Pro 4 is Upstage’s flagship model, released on August 6, 2026, built for agentic use and document-based work, coding and business tasks. It supports a 512K context, up to 128K output tokens and a reasoning mode. It is available through Upstage’s console and on-premises.
| Property | Beam 1.0 | Solar Pro 4 |
|---|---|---|
| Released | Oct 16, 2026 | Aug 6, 2026 |
| Developer | Reflection AI | Upstage |
| Type | llm | llm |
| License | open-weight | proprietary |
| Context window | 1,000,000 | — |
| Parameters | 501B total, 23B active (sparse mixture of experts) | — |
| Developer status | — | — |
| Input $/M tokens | — | $0.15 |
| Output $/M tokens | — | $0.60 |
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.
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