head-to-head

Google: Gemini 4 Carbon (batch) vs OpenAI: GPT-6.1 Terra Pro

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-12.

The verdict

For a sample job of 1 million input tokens and 250,000 output tokens, both cost $2.25 at current list prices.

Both take in a similar amount of text: 1,048,576 and 1,050,000 tokens, about 1,573 and 1,575 pages.

Only Gemini 4 Carbon (batch) offers audio input and video input.

Across the 18 tasks where they differ, Gemini 4 Carbon (batch) scores higher on 18 (SQL Generation, Code Review, Code Completion and others).

Gemini 4 Carbon (batch) was released in November 2026 and GPT-6.1 Terra Pro in October 2026.

Pick Gemini 4 Carbon (batch) if you need audio input, video input or the stronger all-round task scores.

Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.

Task	Google: Gemini 4 Carbon (batch)	OpenAI: GPT-6.1 Terra Pro
SQL Generation	145	133
Code Review	150	132
Code Completion	120	118
Code Refactoring	151	136
Bug Fixing	154	136
Unit Test Generation	135	124
Code Documentation	139	130
Regex Writing	128	118
CI/CD Pipelines	131	120
Frontend Component Design	133	122
Data Analysis	138	124
CSV / Spreadsheet Cleanup	137	133
ETL Scripting	141	128
OCR / Document Parsing	135	131
Table Extraction from PDFs	135	131
Long-Document Summarization	153	137
Short-Form Summarization	119	114
Blog Post Writing	133	121

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