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 — Moonshot AI
Kimi K3 is Moonshot AI's 2.8-trillion-parameter open-weight Mixture-of-Experts model with native vision and a 1-million-token context window, built on Kimi Delta Attention and Attention Residuals. On the API it always reasons, with configurable reasoning effort.
Model B — Meta
Muse Spark 1.3 is the latest version of Meta's Muse Spark model, released on September 2, 2026 and tuned for agentic workflows and coding. It takes text, image, video, audio and PDF input and returns text, with reasoning effort up to 'max'. Meta says audio input is not yet fully supported.
| Property | Kimi K3 | Muse Spark 1.3 |
|---|---|---|
| Released | Jul 16, 2026 | Sep 2, 2026 |
| Developer | Moonshot AI | Meta |
| Type | multimodal | multimodal |
| License | open-weight | proprietary |
| Context window | 1,048,576 | 1,048,576 |
| Parameters | 2.8T total, 104B activated (MoE; 16 of 896 experts per token) | — |
| Developer status | — | — |
| Input $/M tokens | $3.00 | $1.25 |
| Output $/M tokens | $15.00 | $4.25 |
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 exclusive capabilities
Programmatic access available at /api/ai/compare?a=kimi-k3&b=muse-spark-1-3. CORS is open. Citation guidance: /about/editorial-process.