Muse Spark 1.3 Contributor vs GLM 5.3 Flash
Muse Spark 1.3 Contributor vs GLM 5.3 Flash: which AI model is cheaper, has the larger context window and more capabilities? Side-by-side comparison updated daily.
Quick verdict
- Muse Spark 1.3 Contributor is 1.9× cheaper than GLM 5.3 Flash for the same mix of input and output tokens.
- Both have the same context window.
- Muse Spark 1.3 Contributor is the more recent release (Sep 2, 2026).
- Only GLM 5.3 Flash has openly published weights you can run yourself.
- Choose Muse Spark 1.3 Contributor if cost matters most; choose GLM 5.3 Flash if you need its specific strengths above. For the best results, test both on your own prompts.
| Muse Spark 1.3 Contributor | GLM 5.3 Flash | |
|---|---|---|
| Company | Meta | Z.ai (Zhipu) |
| Released | Sep 2, 2026 ● | Aug 26, 2026 |
| Overall index | — | 151.9 |
| GPQA Diamond | — | 90.2% |
| AIME math | — | 93.9% |
| FrontierMath | — | 55.8% |
| Input (per 1M tokens) | $0.10 ● | $0.15 |
| Output (per 1M tokens) | $0.20 ● | $0.50 |
| Cost for 1M input + 1M output tokens | $0.30 ● | $0.65 |
| Providers | 1 | 33 ● |
| Context | 1M | 1M |
| Max output | 944K ● | 944K |
| Inputs | Text, Image, Video, Files ● | Text, Image, Video |
| Outputs | Text | Text |
| Reasoning | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Open weights | — | ✓ |
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