Comparison guide
Open-weight and proprietary models
Models you can download and run yourself next to hosted proprietary models. Compare licences, context windows and API prices.
| Criterion | FLUX 3 Image Klein | Muse Spark Open (816B-A42B) | Mistral Large 4 | Gemini 4 Argon | Claude Opus 5.5 |
|---|---|---|---|---|---|
| Provider | Black Forest Labs | Meta | Mistral AI | Anthropic | |
| Release date | Oct 15, 2026 | Oct 15, 2026 | Oct 6, 2026 | Oct 13, 2026 | Sep 22, 2026 |
| Status | Generally available New | Generally available New | Preview Preview | Generally available New | Generally available Updated |
| Purpose | Open-weight | Open-weight | Flagship | Flagship | Flagship |
| Inputs → outputs | text, image → image | text, image, video, audio → text | text, image → text | text, image, video, audio, pdf → text | text, image → text |
| Context window | Not documented | 1,000,000 tokens | 1,000,000 tokens | 1,048,576 tokens | 1,000,000 tokens |
| API input price | Not verified | Not verified | $0.68 per 1M tokens | $2 per 1M tokens | $4 per 1M tokens |
| API output price | Not verified | Not verified | $2.09 per 1M tokens | $10 per 1M tokens | $20 per 1M tokens |
| Example: 1,000,000 in + 200,000 out tokens | Cannot calculate — rate not verified | Cannot calculate — rate not verified | $1.10 | $4 | $8 |
| Licence | open-weight (licence not verified) | open-weight (Muse Model License) | open-weight (licence not yet published) | proprietary | proprietary |
| Last verified | Oct 19, 2026 | Oct 19, 2026 | Oct 19, 2026 | Oct 19, 2026 | Oct 19, 2026 |
Open in the comparison builder (all rows)
How to choose
- Open-weight does not automatically mean open-source — read the licence for commercial limits.
- Self-hosting trades API fees for hardware and operations work.
The table shows up to five entries in the directory's editorial order, not a ranking. Every value links back to a record with sources and a last-verified date.