head-to-head

Anthropic: Claude Sonnet 5 (batch) vs xAI: Grok Build 0.1

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-07-30.

	Anthropic: Claude Sonnet 5 (batch)	xAI: Grok Build 0.1
Vendor	anthropic	x-ai
Quality Score	100	100
Benchmark Score	90.4	-
Input Price	$1.00/M	$1.00/M
Output Price	$5.00/M	$2.00/M
Context Window	1,000,000	256,000
Max Output	128,000	-
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	-	-
Benchmark Scores
ai_index	88.0	-
ai_index_agentic	77.0	-
ai_index_coding	100.0	-

Who wins by task?

Task	Anthropic: Claude Sonnet 5 (batch)	xAI: Grok Build 0.1
SQL Generation	171	130
Code Review	167	126
Code Completion	120	116
Code Refactoring	164	127
Bug Fixing	180	130
Unit Test Generation	154	121
Code Documentation	143	125
Regex Writing	136	119
CI/CD Pipelines	144	117
Frontend Component Design	146	122
Data Analysis	171	124
CSV / Spreadsheet Cleanup	154	127
ETL Scripting	154	122
JSON Extraction	140	123
Bulk Data Labeling	126	121
OCR / Document Parsing	146	128
Table Extraction from PDFs	146	128
Long-Document Summarization	160	129
Short-Form Summarization	123	115
Blog Post Writing	140	118

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