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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 2026-09-23.

Google: Gemini 3.6 Flash (batch) OpenAI: GPT-5.6 Terra
Vendorgoogleopenai
Quality Score100100
Benchmark Score56.171.1
Input Price$0.38/M$2.00/M
Output Price$1.88/M$12.00/M
Context Window1,048,5761,050,000
Max Output65,536128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio✓-
Benchmark Scores
ai_index56.169.4

Who wins by task?

TaskGoogle: Gemini 3.6 Flash (batch)OpenAI: GPT-5.6 Terra
SQL Generation 140 140
Code Review 142 145
Code Completion 132 118
Code Refactoring 145 147
Bug Fixing 146 149
Unit Test Generation 130 132
Code Documentation 136 135
Regex Writing 125 124
CI/CD Pipelines 126 128
Frontend Component Design 128 130
Data Analysis 132 134
CSV / Spreadsheet Cleanup 136 135
ETL Scripting 135 137
JSON Extraction 131 121
Bulk Data Labeling 129 117
OCR / Document Parsing 133 134
Table Extraction from PDFs 133 134
Long-Document Summarization 146 147
Short-Form Summarization 126 116
Blog Post Writing 128 128

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

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