head-to-head

OpenAI: GPT-5.6 Luna (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 Luna (batch)	Anthropic: Claude Sonnet 5 (batch)
Vendor	openai	anthropic
Quality Score	100	100
Benchmark Score	62.3	63.9
Input Price	$0.10/M	$1.00/M
Output Price	$0.60/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	61.6	63.0

Who wins by task?

Task	OpenAI: GPT-5.6 Luna (batch)	Anthropic: Claude Sonnet 5 (batch)
SQL Generation	141	141
Code Review	143	144
Code Completion	133	120
Code Refactoring	145	146
Bug Fixing	147	148
Unit Test Generation	131	131
Code Documentation	137	136
Regex Writing	126	125
CI/CD Pipelines	127	127
Frontend Component Design	129	129
Data Analysis	133	133
CSV / Spreadsheet Cleanup	136	135
ETL Scripting	136	136
JSON Extraction	131	122
Bulk Data Labeling	129	120
OCR / Document Parsing	134	134
Table Extraction from PDFs	134	134
Long-Document Summarization	147	147
Short-Form Summarization	126	118
Blog Post Writing	129	129

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