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Google: Gemini 3.5 Flash vs xAI: Grok 4.3

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-06-23.

Google: Gemini 3.5 Flash xAI: Grok 4.3
Vendorgooglex-ai
Quality Score100100
Benchmark Score84.557.7
Input Price$1.50/M$1.25/M
Output Price$9.00/M$2.50/M
Context Window1,048,5761,000,000
Max Output65,536-
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio✓-
Benchmark Scores
ai_index82.862.0
ai_index_agentic61.839.8
ai_index_coding100.069.7

Who wins by task?

TaskGoogle: Gemini 3.5 FlashxAI: Grok 4.3
SQL Generation 168 158
Code Review 164 155
Code Completion 119 120
Code Refactoring 162 155
Bug Fixing 176 164
Unit Test Generation 152 144
Code Documentation 141 139
Regex Writing 133 130
CI/CD Pipelines 143 136
Frontend Component Design 145 138
Data Analysis 167 153
CSV / Spreadsheet Cleanup 153 147
ETL Scripting 152 145
JSON Extraction 138 134
Bulk Data Labeling 124 124
OCR / Document Parsing 146 141
Table Extraction from PDFs 146 141
Long-Document Summarization 157 152
Short-Form Summarization 121 120
Blog Post Writing 138 134

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

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