head-to-head

xAI: Grok 4.3 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 4.3	Google: Gemini 3.1 Flash Lite Preview
Vendor	x-ai	google
Quality Score	100	100
Benchmark Score	84.8	-
Input Price	$1.25/M	$0.25/M
Output Price	$2.50/M	$1.50/M
Context Window	1,000,000	1,048,576
Max Output	-	65,536
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	✓
Benchmark Scores
ai_index	87.8	-
ai_index_agentic	100.0	-
ai_index_coding	67.7	-

Who wins by task?

Task	xAI: Grok 4.3	Google: Gemini 3.1 Flash Lite Preview
SQL Generation	169	133
Code Review	166	132
Code Completion	121	131
Code Refactoring	163	136
Bug Fixing	181	136
Unit Test Generation	152	124
Code Documentation	143	131
Regex Writing	136	119
CI/CD Pipelines	143	120
Frontend Component Design	145	122
Data Analysis	170	124
CSV / Spreadsheet Cleanup	150	133
ETL Scripting	153	128
JSON Extraction	136	131
Bulk Data Labeling	125	129
OCR / Document Parsing	144	131
Table Extraction from PDFs	144	131
Long-Document Summarization	160	137
Short-Form Summarization	124	123
Blog Post Writing	140	121

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