head-to-head

OpenAI: GPT-5.6 Terra 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	Anthropic: Claude Sonnet 5 (batch)
Vendor	openai	anthropic
Quality Score	100	100
Benchmark Score	71.1	63.9
Input Price	$2.00/M	$1.00/M
Output Price	$12.00/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	Anthropic: Claude Sonnet 5 (batch)
SQL Generation	140	141
Code Review	145	144
Code Completion	118	120
Code Refactoring	147	146
Bug Fixing	149	148
Unit Test Generation	132	131
Code Documentation	135	136
Regex Writing	124	125
CI/CD Pipelines	128	127
Frontend Component Design	130	129
Data Analysis	134	133
CSV / Spreadsheet Cleanup	135	135
ETL Scripting	137	136
JSON Extraction	121	122
Bulk Data Labeling	117	120
OCR / Document Parsing	134	134
Table Extraction from PDFs	134	134
Long-Document Summarization	147	147
Short-Form Summarization	116	118
Blog Post Writing	128	129

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