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 — 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.
Model B — StepFun
Step 3.7 Flash is StepFun's open-weight vision-language Mixture-of-Experts model, 198B parameters with about 11B active per token, built for high-throughput agent workloads. It supports a 256k context and three reasoning levels.
| Property | Stable Audio 3.0 Large | Step 3.7 Flash |
|---|---|---|
| Released | May 20, 2026 | May 29, 2026 |
| Developer | Stability AI | StepFun |
| Type | audio | multimodal |
| License | proprietary | open-weight |
| Context window | — | — |
| Parameters | 2.7B (diffusion transformer only) | 198B total (196B language backbone + 1.8B vision encoder), about 11B activated per token |
| Developer status | — | — |
| Input $/M tokens | — | $0.20 |
| Output $/M tokens | — | $1.15 |
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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