head-to-head

OpenAI: GPT-5.4 Nano vs Google: Gemini 3.1 Pro Preview Custom Tools

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

	OpenAI: GPT-5.4 Nano	Google: Gemini 3.1 Pro Preview Custom Tools
Vendor	openai	google
Quality Score	100	100
Benchmark Score	31.5	-
Input Price	$0.20/M	$2.00/M
Output Price	$1.25/M	$12.00/M
Context Window	400,000	1,048,576
Max Output	128,000	65,536
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	✓
Benchmark Scores
ai_index	34.2	-

Who wins by task?

Task	OpenAI: GPT-5.4 Nano	Google: Gemini 3.1 Pro Preview Custom Tools
SQL Generation	138	132
Code Review	138	132
Code Completion	132	117
Code Refactoring	141	136
Bug Fixing	142	136
Unit Test Generation	128	124
Code Documentation	134	129
Regex Writing	123	117
CI/CD Pipelines	124	120
Frontend Component Design	126	122
Data Analysis	129	124
CSV / Spreadsheet Cleanup	135	132
ETL Scripting	132	128
JSON Extraction	131	121
Bulk Data Labeling	129	117
OCR / Document Parsing	132	131
Table Extraction from PDFs	132	131
Long-Document Summarization	143	136
Short-Form Summarization	125	113
Blog Post Writing	126	120

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