head-to-head
Google: Gemini 3.5 Flash vs xAI: Grok 4.20
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-05-31.
| Google: Gemini 3.5 Flash | xAI: Grok 4.20 | |
|---|---|---|
| Vendor | x-ai | |
| Quality Score | 100 | 100 |
| Input Price | $1.50/M | $1.25/M |
| Output Price | $9.00/M | $2.50/M |
| Context Window | 1,048,576 | 2,000,000 |
| Max Output | 65,536 | - |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | ✓ | - |
Who wins by task?
| Task | Google: Gemini 3.5 Flash | xAI: Grok 4.20 |
|---|---|---|
| SQL Generation | 132 | 133 |
| Code Completion | 117 | 119 |
| Code Documentation | 129 | 131 |
| Regex Writing | 117 | 119 |
| CSV / Spreadsheet Cleanup | 132 | 133 |
| JSON Extraction | 121 | 123 |
| Bulk Data Labeling | 118 | 120 |
| Long-Document Summarization | 136 | 137 |
| Short-Form Summarization | 113 | 115 |
| Blog Post Writing | 121 | 121 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →
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