head-to-head

SpaceXAI: 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 2026-09-23.

	SpaceXAI: Grok 4.20	Google: Gemini 3.1 Pro Preview Custom Tools
Vendor	x-ai	google
Quality Score	100	100
Benchmark Score	50.6	-
Input Price	$1.25/M	$2.00/M
Output Price	$2.50/M	$12.00/M
Context Window	2,000,000	1,048,576
Max Output	1,800,000	65,536
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	✓
Benchmark Scores
ai_index	42.3	-
eqbench	55.8	-

Who wins by task?

Task	SpaceXAI: Grok 4.20	Google: Gemini 3.1 Pro Preview Custom Tools
SQL Generation	142	132
Code Review	146	132
Code Completion	121	117
Code Refactoring	150	136
Bug Fixing	150	136
Unit Test Generation	133	124
Code Documentation	139	129
Regex Writing	125	117
CI/CD Pipelines	129	120
Frontend Component Design	129	122
Data Analysis	133	124
CSV / Spreadsheet Cleanup	138	132
ETL Scripting	139	128
JSON Extraction	123	121
Bulk Data Labeling	120	117
OCR / Document Parsing	134	131
Table Extraction from PDFs	134	131
Long-Document Summarization	151	136
Short-Form Summarization	118	113
Blog Post Writing	130	120

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