$ diff muse-spark-1-3 glm-5-3-flash
Muse Spark 1.3 vs GLM-5.3-Flash
Values come from Muse Spark 1.3 and GLM-5.3-Flash, 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
- 1.0M
- weights
- open
- $/M in
- $0.15
- $/M out
- $0.5
What actually differs
- Context window
- GLM-5.3-Flash takes 1.0M against 1M — modestly more room in a single request.
- Input price
- GLM-5.3-Flash at $0.15/M against $1.25/M — 8.3× 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
- GLM-5.3-Flash at $0.5/M against $4.25/M — 8.5× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Weights
- GLM-5.3-Flash publishes weights (MIT); 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 7 days after GLM-5.3-Flash (2026-09-02 vs 2026-08-26).
Full spec
| Attribute | Muse Spark 1.3 | GLM-5.3-Flash |
|---|---|---|
| Developer | Meta AI | Z.ai |
| Released | 2026-09-02 | 2026-08-26 |
| Context window | 1,000,000 | 1,048,576 (1M) |
| Pricing | Standard $1.25/M input · $4.25/M output · Contributor ≈$0.10/M input · ≈$0.20/M output | $0.15/M input · $0.03/M cached input · $0.50/M output |
| License | proprietary | MIT |
| Availability | Muse Code, Meta Model API | Hugging Face (open weights), Z.ai API |