head-to-head

xAI: Grok 4.20 vs Google: Gemini 3.1 Flash Lite Preview

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-06-16.

	xAI: Grok 4.20	Google: Gemini 3.1 Flash Lite Preview
Vendor	x-ai	google
Quality Score	100	100
Benchmark Score	74.7	-
Input Price	$1.25/M	$0.25/M
Output Price	$2.50/M	$1.50/M
Context Window	2,000,000	1,048,576
Max Output	-	65,536
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	✓
Benchmark Scores
ai_index	81.4	-
ai_index_agentic	88.9	-
ai_index_coding	69.6	-
eqbench	55.8	-

Who wins by task?

Task	xAI: Grok 4.20	Google: Gemini 3.1 Flash Lite Preview
SQL Generation	171	133
Code Review	170	132
Code Completion	122	131
Code Refactoring	168	136
Bug Fixing	185	136
Unit Test Generation	154	124
Code Documentation	147	131
Regex Writing	137	119
CI/CD Pipelines	146	120
Frontend Component Design	146	122
Data Analysis	170	124
CSV / Spreadsheet Cleanup	153	133
ETL Scripting	157	128
JSON Extraction	136	131
Bulk Data Labeling	125	129
OCR / Document Parsing	145	131
Table Extraction from PDFs	145	131
Long-Document Summarization	166	137
Short-Form Summarization	124	123
Blog Post Writing	143	121

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