Google: Gemini 4 Carbon vs Meta: Muse Spark Open
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-12.
| Google: Gemini 4 Carbon | Meta: Muse Spark Open | |
|---|---|---|
| Vendor | meta | |
| Quality Score | 100 | 100 |
| Benchmark Score | 98.9 | 37.1 |
| Input Price | $2.00/M | $1.25/M |
| Output Price | $10.00/M | $4.25/M |
| Context Window | 1,048,576 | 1,048,576 |
| Max Output | 943,718 | 262,144 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | ✓ | ✓ |
| Benchmark Scores | ||
| ai_index | 99.0 | 41.1 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Muse Spark Open costs $2.31 and Gemini 4 Carbon costs $4.50, so Muse Spark Open is about 1.9 times cheaper for the same work.
Both read up to 1,048,576 tokens at once, roughly 1,573 pages of text.
On our blended benchmark score Gemini 4 Carbon leads 98.9 to 37.1.
Across the 20 tasks where they differ, Gemini 4 Carbon scores higher on 17 (SQL Generation, Code Review, Code Refactoring and others), Muse Spark Open on 3 (Code Completion, JSON Extraction, Bulk Data Labeling).
Gemini 4 Carbon was released in November 2026 and Muse Spark Open in October 2026.
Pick Gemini 4 Carbon if you need benchmark performance or the stronger all-round task scores; pick Muse Spark Open 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 | Google: Gemini 4 Carbon | Meta: Muse Spark Open |
|---|---|---|
| SQL Generation | 144 | 138 |
| Code Review | 150 | 139 |
| Code Completion | 119 | 119 |
| Code Refactoring | 151 | 142 |
| Bug Fixing | 154 | 143 |
| Unit Test Generation | 135 | 128 |
| Code Documentation | 138 | 134 |
| Regex Writing | 127 | 123 |
| CI/CD Pipelines | 131 | 124 |
| Frontend Component Design | 133 | 126 |
| Data Analysis | 138 | 130 |
| CSV / Spreadsheet Cleanup | 136 | 135 |
| ETL Scripting | 141 | 133 |
| JSON Extraction | 121 | 122 |
| Bulk Data Labeling | 118 | 120 |
| OCR / Document Parsing | 135 | 133 |
| Table Extraction from PDFs | 135 | 133 |
| Long-Document Summarization | 152 | 144 |
| Short-Form Summarization | 118 | 117 |
| Blog Post Writing | 132 | 126 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →