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

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.

Google: Gemini 3.6 Flash OpenAI: GPT-5.6 Terra (batch)
Vendorgoogleopenai
Quality Score100100
Benchmark Score56.171.1
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_index56.169.4

Who wins by task?

TaskGoogle: Gemini 3.6 FlashOpenAI: GPT-5.6 Terra (batch)
SQL Generation 140 141
Code Review 142 145
Code Completion 132 120
Code Refactoring 145 147
Bug Fixing 146 149
Unit Test Generation 130 132
Code Documentation 136 136
Regex Writing 124 125
CI/CD Pipelines 126 128
Frontend Component Design 128 130
Data Analysis 132 134
CSV / Spreadsheet Cleanup 135 136
ETL Scripting 135 137
JSON Extraction 131 122
Bulk Data Labeling 128 119
OCR / Document Parsing 133 134
Table Extraction from PDFs 133 134
Long-Document Summarization 146 148
Short-Form Summarization 125 118
Blog Post Writing 128 129

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

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