head-to-head
xAI: Grok 4.5 vs Anthropic: Claude Sonnet 5
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-07-10.
| xAI: Grok 4.5 | Anthropic: Claude Sonnet 5 | |
|---|---|---|
| Vendor | x-ai | anthropic |
| Quality Score | 100 | 100 |
| Benchmark Score | 91.8 | 92.0 |
| 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 | 88.0 |
| ai_index_agentic | 75.4 | 77.0 |
| ai_index_coding | 100.0 | 100.0 |
Who wins by task?
| Task | xAI: Grok 4.5 | Anthropic: Claude Sonnet 5 |
|---|---|---|
| SQL Generation | 171 | 171 |
| Code Completion | 120 | 119 |
| Bug Fixing | 180 | 180 |
| Code Documentation | 142 | 141 |
| Regex Writing | 135 | 135 |
| Data Analysis | 170 | 171 |
| CSV / Spreadsheet Cleanup | 154 | 153 |
| JSON Extraction | 139 | 138 |
| Bulk Data Labeling | 125 | 124 |
| Long-Document Summarization | 159 | 159 |
| Short-Form Summarization | 123 | 122 |
| Blog Post Writing | 140 | 140 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →
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