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Anthropic: Claude Opus 4.8 (batch) vs SpaceXAI: Grok Build 0.1

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

Anthropic: Claude Opus 4.8 (batch) SpaceXAI: Grok Build 0.1
Vendoranthropicx-ai
Quality Score100100
Benchmark Score94.7-
Input Price$2.50/M$1.00/M
Output Price$12.50/M$2.00/M
Context Window1,000,000256,000
Max Output128,000-
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index94.6-
ai_index_agentic81.5-
ai_index_coding100.0-
eqbench83.3-

Who wins by task?

TaskAnthropic: Claude Opus 4.8 (batch)SpaceXAI: Grok Build 0.1
SQL Generation 178 130
Code Review 179 126
Code Completion 121 116
Code Refactoring 176 127
Bug Fixing 193 130
Unit Test Generation 161 121
Code Documentation 148 125
Regex Writing 138 119
CI/CD Pipelines 151 117
Frontend Component Design 151 122
Data Analysis 178 124
CSV / Spreadsheet Cleanup 158 127
ETL Scripting 164 122
JSON Extraction 138 123
Bulk Data Labeling 123 121
OCR / Document Parsing 149 128
Table Extraction from PDFs 149 128
Long-Document Summarization 171 129
Short-Form Summarization 123 115
Blog Post Writing 146 118

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

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