head-to-head

OpenAI: GPT-5.4 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	Google: Gemini 3.1 Pro Preview Custom Tools
Vendor	openai	google
Quality Score	100	100
Benchmark Score	80.9	-
Input Price	$2.50/M	$2.00/M
Output Price	$15.00/M	$12.00/M
Context Window	1,050,000	1,048,576
Max Output	128,000	65,536
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	✓
Benchmark Scores
ai_index	64.3	-
eqbench	82.4	-

Who wins by task?

Task	OpenAI: GPT-5.4	Google: Gemini 3.1 Pro Preview Custom Tools
SQL Generation	145	132
Code Review	154	132
Code Completion	120	117
Code Refactoring	157	136
Bug Fixing	158	136
Unit Test Generation	137	124
Code Documentation	140	129
Regex Writing	126	117
CI/CD Pipelines	133	120
Frontend Component Design	133	122
Data Analysis	138	124
CSV / Spreadsheet Cleanup	139	132
ETL Scripting	145	128
JSON Extraction	120	121
Bulk Data Labeling	116	117
OCR / Document Parsing	136	131
Table Extraction from PDFs	136	131
Long-Document Summarization	157	136
Short-Form Summarization	117	113
Blog Post Writing	133	120

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