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Google: Gemini 3.1 Flash Lite vs xAI: Grok 4.20

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-05-13.

Google: Gemini 3.1 Flash Lite xAI: Grok 4.20
Vendorgooglex-ai
Quality Score100100
Input Price$0.25/M$1.25/M
Output Price$1.50/M$2.50/M
Context Window1,048,5762,000,000
Max Output65,536-
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio✓-

Who wins by task?

TaskGoogle: Gemini 3.1 Flash LitexAI: Grok 4.20
SQL Generation 133 133
Code Completion 131 119
Code Documentation 131 131
Regex Writing 119 119
CSV / Spreadsheet Cleanup 133 133
JSON Extraction 131 123
Bulk Data Labeling 129 120
Long-Document Summarization 137 137
Short-Form Summarization 123 115
Blog Post Writing 121 121

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

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