head-to-head

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

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-08-13.

	OpenAI: GPT-5.6 Terra Pro	Anthropic: Claude Sonnet 5 (batch)
Vendor	openai	anthropic
Quality Score	100	100
Benchmark Score	-	91.6
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	-	91.2
ai_index_agentic	-	82.0
ai_index_coding	-	100.0

Who wins by task?

Task	OpenAI: GPT-5.6 Terra Pro	Anthropic: Claude Sonnet 5 (batch)
SQL Generation	133	172
Code Review	132	168
Code Completion	118	120
Code Refactoring	136	165
Bug Fixing	136	182
Unit Test Generation	124	155
Code Documentation	130	143
Regex Writing	118	136
CI/CD Pipelines	120	145
Frontend Component Design	122	147
Data Analysis	124	172
CSV / Spreadsheet Cleanup	133	154
ETL Scripting	128	155
JSON Extraction	122	140
Bulk Data Labeling	119	126
OCR / Document Parsing	131	147
Table Extraction from PDFs	131	147
Long-Document Summarization	137	160
Short-Form Summarization	114	123
Blog Post Writing	121	141

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