head-to-head
OpenAI: GPT-5.6 Terra vs Anthropic: Claude Sonnet 5
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-07-11.
| OpenAI: GPT-5.6 Terra | Anthropic: Claude Sonnet 5 | |
|---|---|---|
| Vendor | openai | anthropic |
| Quality Score | 100 | 100 |
| Benchmark Score | 93.0 | 91.4 |
| Input Price | $2.50/M | $2.00/M |
| Output Price | $15.00/M | $10.00/M |
| Context Window | 1,050,000 | 1,000,000 |
| Max Output | 128,000 | 128,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 90.7 | 88.0 |
| ai_index_agentic | 78.2 | 77.0 |
| ai_index_coding | 100.0 | 100.0 |
Who wins by task?
| Task | OpenAI: GPT-5.6 Terra | Anthropic: Claude Sonnet 5 |
|---|---|---|
| Code Review | 168 | 167 |
| Code Completion | 118 | 119 |
| Code Refactoring | 165 | 164 |
| Bug Fixing | 181 | 180 |
| Unit Test Generation | 155 | 154 |
| Code Documentation | 141 | 141 |
| Regex Writing | 134 | 135 |
| CI/CD Pipelines | 145 | 144 |
| Frontend Component Design | 147 | 146 |
| Data Analysis | 171 | 171 |
| CSV / Spreadsheet Cleanup | 153 | 153 |
| ETL Scripting | 155 | 154 |
| JSON Extraction | 137 | 138 |
| Bulk Data Labeling | 122 | 124 |
| OCR / Document Parsing | 147 | 146 |
| Table Extraction from PDFs | 147 | 146 |
| Short-Form Summarization | 121 | 122 |
| Blog Post Writing | 139 | 140 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →
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