head-to-head

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

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 Pro
Vendorgoogleopenai
Quality Score100100
Benchmark Score56.1-
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_index56.1-

Who wins by task?

TaskGoogle: Gemini 3.6 Flash (batch)OpenAI: GPT-5.6 Terra Pro
SQL Generation 140 132
Code Review 142 132
Code Completion 132 117
Code Refactoring 145 136
Bug Fixing 146 136
Unit Test Generation 130 124
Code Documentation 136 129
Regex Writing 125 117
CI/CD Pipelines 126 120
Frontend Component Design 128 122
Data Analysis 132 124
CSV / Spreadsheet Cleanup 136 132
ETL Scripting 135 128
JSON Extraction 131 121
Bulk Data Labeling 129 117
OCR / Document Parsing 133 131
Table Extraction from PDFs 133 131
Long-Document Summarization 146 136
Short-Form Summarization 126 113
Blog Post Writing 128 120

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

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