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 — NVIDIA
Nemotron 3 Ultra is an open-weight language model from NVIDIA, released on June 4, 2026, which NVIDIA describes as frontier-scale, with 550B total and 55B active parameters in a hybrid Mamba-2, mixture-of-experts and attention architecture. It produces a reasoning trace before its answer and supports up to 1M tokens of context.
Model B — Stability AI
Stable Audio 3.0 Large is an audio generation model from Stability AI, released on May 20, 2026 and served through its API, which Stability AI describes as its most advanced audio model. It generates music and sound of up to about six minutes in 44.1 kHz stereo and supports audio-to-audio and inpainting; Stability AI says it was trained on licensed data. It is also available for self-hosting in enterprise deployments.
| Property | NVIDIA Nemotron 3 Ultra | Stable Audio 3.0 Large |
|---|---|---|
| Released | Jun 4, 2026 | May 20, 2026 |
| Developer | NVIDIA | Stability AI |
| Type | reasoning | audio |
| License | open-weight | proprietary |
| Context window | 1,048,576 | — |
| Parameters | 550B total, 55B active (LatentMoE: Mamba-2 + MoE + attention hybrid) | 2.7B (diffusion transformer only) |
| Developer status | — | — |
| Input $/M tokens | — | — |
| Output $/M tokens | — | — |
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 shared capabilities
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