head-to-head

xAI: Grok 4.20 vs Google: Gemini 3.1 Pro Preview Custom Tools

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-04-30.

	xAI: Grok 4.20	Google: Gemini 3.1 Pro Preview Custom Tools
Vendor	x-ai	google
Quality Score	100	100
Input Price	$2.00/M	$2.00/M
Output Price	$6.00/M	$12.00/M
Context Window	2,000,000	1,048,576
Max Output	-	65,536
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	✓

Who wins by task?

Task	xAI: Grok 4.20	Google: Gemini 3.1 Pro Preview Custom Tools
SQL Generation	133	132
Code Completion	118	117
Code Documentation	130	129
Regex Writing	118	117
CSV / Spreadsheet Cleanup	133	132
JSON Extraction	122	121
Bulk Data Labeling	119	117
Long-Document Summarization	137	136
Short-Form Summarization	114	113
Blog Post Writing	121	120

Scores reflect capability match + benchmark data + pricing for each task. Methodology →