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Google: Gemini 3.6 Flash (batch) vs OpenAI: GPT-5.6 Terra

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-07-30.

Google: Gemini 3.6 Flash (batch) OpenAI: GPT-5.6 Terra
Vendorgoogleopenai
Quality Score100100
Benchmark Score83.991.9
Input Price$0.75/M$1.25/M
Output Price$3.75/M$7.50/M
Context Window1,048,5761,050,000
Max Output65,536128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio✓-
Benchmark Scores
ai_index82.690.7
ai_index_agentic63.978.2
ai_index_coding100.0100.0

Who wins by task?

TaskGoogle: Gemini 3.6 Flash (batch)OpenAI: GPT-5.6 Terra
SQL Generation 169 172
Code Review 165 168
Code Completion 132 120
Code Refactoring 162 165
Bug Fixing 177 181
Unit Test Generation 153 155
Code Documentation 142 142
Regex Writing 135 136
CI/CD Pipelines 143 145
Frontend Component Design 145 147
Data Analysis 167 171
CSV / Spreadsheet Cleanup 153 154
ETL Scripting 153 155
JSON Extraction 148 139
Bulk Data Labeling 134 125
OCR / Document Parsing 146 147
Table Extraction from PDFs 146 147
Long-Document Summarization 158 160
Short-Form Summarization 131 123
Blog Post Writing 139 140

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

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