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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 2026-06-12.

Google: Gemini 3.5 Flash xAI: Grok 4.3
Vendorgooglex-ai
Quality Score100100
Benchmark Score88.384.8
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_index91.387.8
ai_index_agentic100.0100.0
ai_index_coding74.267.7

Who wins by task?

TaskGoogle: Gemini 3.5 FlashxAI: Grok 4.3
SQL Generation 170 169
Code Review 167 166
Code Completion 119 121
Code Refactoring 164 163
Bug Fixing 183 181
Unit Test Generation 153 152
Code Documentation 142 143
Regex Writing 136 136
CI/CD Pipelines 144 143
Frontend Component Design 146 145
Data Analysis 172 170
CSV / Spreadsheet Cleanup 150 150
ETL Scripting 154 153
JSON Extraction 136 136
Bulk Data Labeling 123 125
OCR / Document Parsing 145 144
Table Extraction from PDFs 145 144
Long-Document Summarization 160 160
Short-Form Summarization 122 124

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

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