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

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-08-08.

Google: Gemini 3.6 Flash (batch) OpenAI: GPT-5.6 Terra Pro (batch)
Vendorgoogleopenai
Quality Score100100
Benchmark Score84.4-
Input Price$0.75/M$1.00/M
Output Price$3.75/M$6.00/M
Context Window1,048,5761,050,000
Max Output65,536128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio✓-
Benchmark Scores
ai_index85.1-
ai_index_agentic66.8-
ai_index_coding100.0-

Who wins by task?

TaskGoogle: Gemini 3.6 Flash (batch)OpenAI: GPT-5.6 Terra Pro (batch)
SQL Generation 170 133
Code Review 165 132
Code Completion 132 118
Code Refactoring 163 136
Bug Fixing 178 136
Unit Test Generation 153 124
Code Documentation 142 130
Regex Writing 135 118
CI/CD Pipelines 143 120
Frontend Component Design 145 122
Data Analysis 168 124
CSV / Spreadsheet Cleanup 154 133
ETL Scripting 153 128
JSON Extraction 148 122
Bulk Data Labeling 134 119
OCR / Document Parsing 146 131
Table Extraction from PDFs 146 131
Long-Document Summarization 159 137
Short-Form Summarization 131 114
Blog Post Writing 139 121

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

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