Meta: Muse Spark Open vs Z.ai: GLM 5.3 FlashX
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-19.
| Meta: Muse Spark Open | Z.ai: GLM 5.3 FlashX | |
|---|---|---|
| Vendor | meta | z-ai |
| Quality Score | 100 | 100 |
| Benchmark Score | 63.9 | - |
| Input Price | $1.25/M | $0.37/M |
| Output Price | $4.25/M | $1.25/M |
| Context Window | 1,048,576 | 1,048,576 |
| Max Output | 943,718 | 131,072 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | ✓ | - |
| Benchmark Scores | ||
| ai_index | 64.1 | - |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, GLM 5.3 FlashX costs $0.68 and Muse Spark Open costs $2.31, so GLM 5.3 FlashX is about 3.4 times cheaper for the same work.
Both read up to 1,048,576 tokens at once, roughly 1,573 pages of text.
Only Muse Spark Open offers audio input.
Across the 20 tasks where they differ, Muse Spark Open scores higher on 16 (SQL Generation, Code Review, Code Refactoring and others), GLM 5.3 FlashX on 4 (Code Completion, JSON Extraction, Bulk Data Labeling and others).
Muse Spark Open was released in October 2026 and GLM 5.3 FlashX in September 2026.
Pick Muse Spark Open if you need audio input or the stronger all-round task scores; pick GLM 5.3 FlashX if you need lower cost.
Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.
Who wins by task?
| Task | Meta: Muse Spark Open | Z.ai: GLM 5.3 FlashX |
|---|---|---|
| SQL Generation | 141 | 133 |
| Code Review | 144 | 132 |
| Code Completion | 120 | 131 |
| Code Refactoring | 146 | 136 |
| Bug Fixing | 148 | 136 |
| Unit Test Generation | 131 | 124 |
| Code Documentation | 136 | 131 |
| Regex Writing | 125 | 119 |
| CI/CD Pipelines | 127 | 120 |
| Frontend Component Design | 129 | 122 |
| Data Analysis | 133 | 124 |
| CSV / Spreadsheet Cleanup | 136 | 133 |
| ETL Scripting | 137 | 128 |
| JSON Extraction | 122 | 131 |
| Bulk Data Labeling | 120 | 129 |
| OCR / Document Parsing | 134 | 131 |
| Table Extraction from PDFs | 134 | 131 |
| Long-Document Summarization | 147 | 137 |
| Short-Form Summarization | 118 | 123 |
| Blog Post Writing | 129 | 121 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →