head-to-head
Anthropic: Claude Sonnet 5 vs OpenAI: GPT-5.4 Nano
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.
| Anthropic: Claude Sonnet 5 | OpenAI: GPT-5.4 Nano | |
|---|---|---|
| Vendor | anthropic | openai |
| Quality Score | 100 | 100 |
| Benchmark Score | 63.9 | 31.5 |
| Input Price | $2.00/M | $0.20/M |
| Output Price | $10.00/M | $1.25/M |
| Context Window | 1,000,000 | 400,000 |
| Max Output | 128,000 | 128,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 63.0 | 34.2 |
Who wins by task?
| Task | Anthropic: Claude Sonnet 5 | OpenAI: GPT-5.4 Nano |
|---|---|---|
| SQL Generation | 140 | 138 |
| Code Review | 144 | 138 |
| Code Completion | 118 | 132 |
| Code Refactoring | 146 | 141 |
| Bug Fixing | 148 | 142 |
| Unit Test Generation | 131 | 128 |
| Code Documentation | 135 | 134 |
| Regex Writing | 123 | 123 |
| CI/CD Pipelines | 127 | 124 |
| Frontend Component Design | 129 | 126 |
| Data Analysis | 133 | 129 |
| CSV / Spreadsheet Cleanup | 135 | 135 |
| ETL Scripting | 136 | 132 |
| JSON Extraction | 121 | 131 |
| Bulk Data Labeling | 118 | 129 |
| OCR / Document Parsing | 134 | 132 |
| Table Extraction from PDFs | 134 | 132 |
| Long-Document Summarization | 146 | 143 |
| Short-Form Summarization | 116 | 125 |
| Blog Post Writing | 128 | 126 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →
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