GLM-5.3 Flash vs Muse Spark 1.3: Specs & Benchmark Comparison
GLM-5.3 Flash is developed by Zhipu AI, while Muse Spark 1.3 comes from Meta. GLM-5.3 Flash was released in August 2026, and Muse Spark 1.3 followed a month later in September 2026. GLM-5.3 Flash has a published size of about 320 billion parameters; Meta has not disclosed the parameter count of Muse Spark 1.3.
The two models share 4 published benchmarks. Muse Spark 1.3 leads on 3 of them, GLM-5.3 Flash on 1. The widest gaps are on DeepSWE 1.1, where Muse Spark 1.3 scores 75.4% against 63.4%; Terminal-Bench 2.1, where Muse Spark 1.3 scores 88.8% against 84.3%. Averaged across everything we track, GLM-5.3 Flash sits at 64.1% and Muse Spark 1.3 at 73.4%.
GLM-5.3 Flash is the cheaper API at $0.15 per million input tokens and $0.50 per million output tokens, roughly 8 times cheaper than Muse Spark 1.3 at $1.25 and $4.25. Both accept a context window of about 1M tokens. GLM-5.3 Flash accepts text, images, and video as input, while Muse Spark 1.3 accepts text, images, audio, and video.
| Characteristic | GLM-5.3 Flash | Muse Spark 1.3 |
|---|---|---|
| Company | Zhipu AI | Meta |
| Release Date | August 26, 2026 | September 2, 2026 |
| Parameters | 320B | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 131K | 944K |
| Input Price / 1M | $0.15 | $1.25 |
| Output Price / 1M | $0.50 | $4.25 |
| Average Score | 64.1% | 73.4% |
| Benchmarks | ||
| DeepSWE 1.1 | 63.4% | 75.4% |
| Terminal-Bench 2.1 | 84.3% | 88.8% |
| AutomationBench v1.0.6 | 48.8% | 49.4% |
| GDPval-AA | 59.1% | 58.5% |
Visual Benchmark Comparison
Verdict
GLM-5.3 Flash leads in 1 out of 4 comparison categories.
Both models show comparable average scores: GLM-5.3 Flash — 0.6, Muse Spark 1.3 — 0.7.
GLM-5.3 Flash is 8.5x cheaper: input $0.15/1M vs $1.25/1M tokens.
Same context size: 1M tokens.
Both models were released around the same time: 8/26/2026 and 9/2/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — GLM-5.3 Flash or Muse Spark 1.3?
Which model is cheaper — GLM-5.3 Flash or Muse Spark 1.3?
Which has a larger context window — GLM-5.3 Flash or Muse Spark 1.3?
The GLM-5.3 Flash and Muse Spark 1.3 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GLM-5.3 Flash or Muse Spark 1.3 page. See also the complete list of AI model comparisons.