GLM-5.3 Flash vs Muse Spark 1.2: Specs & Benchmark Comparison
GLM-5.3 Flash is developed by Zhipu AI, while Muse Spark 1.2 comes from Meta. Both were released in August 2026. GLM-5.3 Flash has a published size of about 320 billion parameters; Meta has not disclosed the parameter count of Muse Spark 1.2.
The two models share 2 published benchmarks. GLM-5.3 Flash leads on 2 of them. The widest gaps are on DeepSWE 1.1, where GLM-5.3 Flash scores 63.4% against 59.0%; Terminal-Bench 2.1, where GLM-5.3 Flash scores 84.3% against 83.0%. Averaged across everything we track, GLM-5.3 Flash sits at 64.1% and Muse Spark 1.2 at 71.0%.
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 1.2 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 1.2 accepts text and images.
| Characteristic | GLM-5.3 Flash | Muse Spark 1.2 |
|---|---|---|
| Company | Zhipu AI | Meta |
| Release Date | August 26, 2026 | August 5, 2026 |
| Parameters | 320B | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 131K | 131K |
| Input Price / 1M | $0.15 | $1.25 |
| Output Price / 1M | $0.50 | $4.25 |
| Average Score | 64.1% | 71.0% |
| Benchmarks | ||
| DeepSWE 1.1 | 63.4% | 59.0% |
| Terminal-Bench 2.1 | 84.3% | 83.0% |
Visual Benchmark Comparison
Verdict
GLM-5.3 Flash leads in 2 out of 4 comparison categories.
Both models show comparable average scores: GLM-5.3 Flash — 0.6, Muse Spark 1.2 — 0.7.
GLM-5.3 Flash is 8.5x cheaper: input $0.15/1M vs $1.25/1M tokens.
Same context size: 1M tokens.
GLM-5.3 Flash is newer: released 8/26/2026 vs 8/5/2026.
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Frequently Asked Questions
Which is better for coding — GLM-5.3 Flash or Muse Spark 1.2?
Which model is cheaper — GLM-5.3 Flash or Muse Spark 1.2?
Which has a larger context window — GLM-5.3 Flash or Muse Spark 1.2?
The GLM-5.3 Flash and Muse Spark 1.2 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 1.2 page. See also the complete list of AI model comparisons.