head-to-head

OpenAI: GPT-5.6 Terra (batch) vs Anthropic: Claude Sonnet 5 (batch)

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

	OpenAI: GPT-5.6 Terra (batch)	Anthropic: Claude Sonnet 5 (batch)
Vendor	openai	anthropic
Quality Score	100	100
Benchmark Score	71.1	63.9
Input Price	$1.00/M	$1.00/M
Output Price	$6.00/M	$5.00/M
Context Window	1,050,000	1,000,000
Max Output	128,000	128,000
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	-
Benchmark Scores
ai_index	69.4	63.0

Who wins by task?

Task	OpenAI: GPT-5.6 Terra (batch)	Anthropic: Claude Sonnet 5 (batch)
SQL Generation	141	141
Code Review	145	144
Code Completion	120	120
Code Refactoring	147	146
Bug Fixing	149	148
Unit Test Generation	132	131
Code Documentation	136	136
Regex Writing	125	125
CI/CD Pipelines	128	127
Frontend Component Design	130	129
Data Analysis	134	133
CSV / Spreadsheet Cleanup	136	135
ETL Scripting	137	136
JSON Extraction	122	122
Bulk Data Labeling	119	120
OCR / Document Parsing	134	134
Table Extraction from PDFs	134	134
Long-Document Summarization	148	147
Short-Form Summarization	118	118
Blog Post Writing	129	129

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