head-to-head

OpenAI: GPT-5.6 Sol Pro (batch) vs Google: Gemini 3.5 Flash (batch)

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

OpenAI: GPT-5.6 Sol Pro (batch) Google: Gemini 3.5 Flash (batch)
Vendoropenaigoogle
Quality Score100100
Benchmark Score-53.5
Input Price$1.00/M$0.75/M
Output Price$5.00/M$4.50/M
Context Window1,050,0001,048,576
Max Output128,00065,536
Tool Calling
Structured Output
Reasoning Mode
Vision
Audio-
Benchmark Scores
ai_index-53.8

Who wins by task?

TaskOpenAI: GPT-5.6 Sol Pro (batch)Google: Gemini 3.5 Flash (batch)
SQL Generation 133 139
Code Review 132 142
Code Completion 118 132
Code Refactoring 136 144
Bug Fixing 136 146
Unit Test Generation 124 130
Code Documentation 130 135
Regex Writing 118 124
CI/CD Pipelines 120 126
Frontend Component Design 122 128
Data Analysis 124 132
CSV / Spreadsheet Cleanup 133 135
ETL Scripting 128 135
JSON Extraction 122 130
Bulk Data Labeling 120 128
OCR / Document Parsing 131 133
Table Extraction from PDFs 131 133
Long-Document Summarization 137 146
Short-Form Summarization 114 125
Blog Post Writing 121 127

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

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