head-to-head

Mistral: Mistral Small 4 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.

	Mistral: Mistral Small 4	Google: Gemini 3.1 Pro Preview Custom Tools
Vendor	mistralai	google
Quality Score	100	100
Benchmark Score	3.8	-
Input Price	$0.15/M	$2.00/M
Output Price	$0.60/M	$12.00/M
Context Window	262,144	1,048,576
Max Output	209,715	65,536
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	✓
Benchmark Scores
ai_index	9.6	-

Who wins by task?

Task	Mistral: Mistral Small 4	Google: Gemini 3.1 Pro Preview Custom Tools
SQL Generation	132	132
Code Review	128	132
Code Completion	129	117
Code Refactoring	129	136
Bug Fixing	132	136
Unit Test Generation	122	124
Code Documentation	127	129
Regex Writing	120	117
CI/CD Pipelines	118	120
Frontend Component Design	123	122
Data Analysis	125	124
CSV / Spreadsheet Cleanup	128	132
ETL Scripting	123	128
JSON Extraction	131	121
Bulk Data Labeling	129	117
OCR / Document Parsing	128	131
Table Extraction from PDFs	128	131
Long-Document Summarization	131	136
Short-Form Summarization	124	113
Blog Post Writing	120	120

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