head-to-head

OpenAI: GPT-5.6 Terra Pro vs OpenAI: GPT-5.6 Terra

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-09.

The verdict

For a sample job of 1 million input tokens and 250,000 output tokens, both cost $5.00 at current list prices.

Both read up to 1,050,000 tokens at once, roughly 1,575 pages of text.

Across the 18 tasks where they differ, GPT-5.6 Terra on 18 (SQL Generation, Code Review, Code Completion and others).

Pick GPT-5.6 Terra if you need 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	OpenAI: GPT-5.6 Terra Pro	OpenAI: GPT-5.6 Terra
SQL Generation	132	140
Code Review	132	145
Code Completion	117	118
Code Refactoring	136	147
Bug Fixing	136	149
Unit Test Generation	124	132
Code Documentation	129	135
Regex Writing	117	124
CI/CD Pipelines	120	128
Frontend Component Design	122	130
Data Analysis	124	134
CSV / Spreadsheet Cleanup	132	135
ETL Scripting	128	137
OCR / Document Parsing	131	134
Table Extraction from PDFs	131	134
Long-Document Summarization	136	147
Short-Form Summarization	113	116
Blog Post Writing	120	128

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