head-to-head

xAI: Grok 4.3 vs Anthropic Claude Sonnet Latest

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-06-28.

	xAI: Grok 4.3	Anthropic Claude Sonnet Latest
Vendor	x-ai	~anthropic
Quality Score	100	100
Benchmark Score	57.7	-
Input Price	$1.25/M	$3.00/M
Output Price	$2.50/M	$15.00/M
Context Window	1,000,000	1,000,000
Max Output	-	128,000
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	-
Benchmark Scores
ai_index	62.0	-
ai_index_agentic	39.8	-
ai_index_coding	69.7	-

Who wins by task?

Task	xAI: Grok 4.3	Anthropic Claude Sonnet Latest
SQL Generation	158	132
Code Review	155	132
Code Completion	120	116
Code Refactoring	155	136
Bug Fixing	164	136
Unit Test Generation	144	124
Code Documentation	139	128
Regex Writing	130	116
CI/CD Pipelines	136	120
Frontend Component Design	138	122
Data Analysis	153	124
CSV / Spreadsheet Cleanup	147	132
ETL Scripting	145	128
JSON Extraction	134	120
Bulk Data Labeling	124	116
OCR / Document Parsing	141	131
Table Extraction from PDFs	141	131
Long-Document Summarization	152	136
Short-Form Summarization	120	112
Blog Post Writing	134	120

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