$ diff k2-horizon muse-spark-1-3
K2 Horizon vs Muse Spark 1.3
Values come from K2 Horizon and Muse Spark 1.3, 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.
IfmK2 Horizon
- context
- 524K
- weights
- open
- $/M in
- —
- $/M out
- —
- context
- 1M
- weights
- closed
- $/M in
- $1.25
- $/M out
- $4.25
What actually differs
- Context window
- Muse Spark 1.3 takes 1M against 524K — modestly more room in a single request.
- Weights
- K2 Horizon publishes weights (Apache 2.0 (weights and code)); Muse Spark 1.3 is API-only. That decides self-hosting, air-gapped deployment and fine-tuning before any capability question does.
- Recency
- K2 Horizon shipped 1 day after Muse Spark 1.3 (2026-09-03 vs 2026-09-02).
Full spec
| Attribute | K2 Horizon | Muse Spark 1.3 |
|---|---|---|
| Developer | Ifm | Meta AI |
| Released | 2026-09-03 | 2026-09-02 |
| Context window | 524,288 (flagship 375B-A23B, native from midtraining onward) | 1,000,000 |
| Pricing | not recorded | Standard $1.25/M input · $4.25/M output · Contributor ≈$0.10/M input · ≈$0.20/M output |
| License | Apache 2.0 (weights and code) | proprietary |
| Availability | Hugging Face (weights, code, checkpoints, training data where redistributable) | Muse Code, Meta Model API |