head-to-head

xAI: Grok 4.5 vs Anthropic Claude Sonnet Latest

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-07-10.

	xAI: Grok 4.5	Anthropic Claude Sonnet Latest
Vendor	x-ai	~anthropic
Quality Score	100	100
Benchmark Score	91.8	-
Input Price	$2.00/M	$2.00/M
Output Price	$6.00/M	$10.00/M
Context Window	500,000	1,000,000
Max Output	-	128,000
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	-
Benchmark Scores
ai_index	88.8	-
ai_index_agentic	75.4	-
ai_index_coding	100.0	-

Who wins by task?

Task	xAI: Grok 4.5	Anthropic Claude Sonnet Latest
SQL Generation	171	132
Code Review	167	132
Code Completion	120	117
Code Refactoring	164	136
Bug Fixing	180	136
Unit Test Generation	154	124
Code Documentation	142	129
Regex Writing	135	117
CI/CD Pipelines	144	120
Frontend Component Design	146	122
Data Analysis	170	124
CSV / Spreadsheet Cleanup	154	132
ETL Scripting	154	128
JSON Extraction	139	121
Bulk Data Labeling	125	118
OCR / Document Parsing	146	131
Table Extraction from PDFs	146	131
Long-Document Summarization	159	136
Short-Form Summarization	123	113
Blog Post Writing	140	120

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