$ diff muse-spark-1-3 kimi-k3
Muse Spark 1.3 vs Kimi K3
Values come from Muse Spark 1.3 and Kimi K3, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
Meta AIMuse Spark 1.3
- context
- 1M
- weights
- closed
- $/M in
- $1.25
- $/M out
- $4.25
- context
- 1M
- weights
- open
- $/M in
- $3
- $/M out
- $15
What actually differs
- Context window
- Identical — both accept 1M tokens, so context length is not a reason to pick either.
- Input price
- Muse Spark 1.3 at $1.25/M against $3/M — 2.4× cheaper to feed. Standard rates: one of these labs also quotes a lower cached-input tier, which applies only when a prefix is reused — see the full spec below.
- Output price
- Muse Spark 1.3 at $4.25/M against $15/M — 3.5× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Weights
- Kimi K3 publishes weights (Modified MIT (commercial use permitted; weights publicly downloadable)); Muse Spark 1.3 is API-only. That decides self-hosting, air-gapped deployment and fine-tuning before any capability question does.
- Recency
- Muse Spark 1.3 shipped 48 days after Kimi K3 (2026-09-02 vs 2026-07-16).
Full spec
| Attribute | Muse Spark 1.3 | Kimi K3 |
|---|---|---|
| Developer | Meta AI | Moonshot AI |
| Released | 2026-09-02 | 2026-07-16 |
| Context window | 1,000,000 | 1M tokens |
| Pricing | Standard $1.25/M input · $4.25/M output · Contributor ≈$0.10/M input · ≈$0.20/M output | $0.30/M cache-hit input · $3.00/M cache-miss input · $15.00/M output |
| License | proprietary | Modified MIT (commercial use permitted; weights publicly downloadable) |
| Availability | Muse Code, Meta Model API | Kimi Code, Kimi app, Kimi API; weights on Hugging Face (`moonshot-ai/kimi-k3`, released 2026-07-27) |