Anthropic: Claude Sonnet 5 vs Qwen: Qwen3.5-27B
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| Anthropic: Claude Sonnet 5 | Qwen: Qwen3.5-27B | |
|---|---|---|
| Vendor | anthropic | qwen |
| Quality Score | 100 | 100 |
| Benchmark Score | 91.4 | 55.6 |
| Input Price | $2.00/M | $0.26/M |
| Output Price | $10.00/M | $2.60/M |
| Context Window | 1,000,000 | 262,144 |
| Max Output | 128,000 | 81,920 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 88.0 | 55.7 |
| ai_index_agentic | 77.0 | - |
| ai_index_coding | 100.0 | - |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Qwen3.5-27B costs $0.91 and Claude Sonnet 5 costs $4.50, so Qwen3.5-27B is about 4.9 times cheaper for the same work.
Claude Sonnet 5 reads up to 1,000,000 tokens at once, roughly 1,500 pages of text, against about 393 pages for Qwen3.5-27B.
Only Qwen3.5-27B offers video input.
On our blended benchmark score Claude Sonnet 5 leads 91.4 to 55.6.
Across the 20 tasks where they differ, Claude Sonnet 5 scores higher on 17 (SQL Generation, Code Review, Code Refactoring and others), Qwen3.5-27B on 3 (Code Completion, Bulk Data Labeling, Short-Form Summarization).
Claude Sonnet 5 was released in June 2026 and Qwen3.5-27B in February 2026.
Pick Claude Sonnet 5 if you need long documents, benchmark performance or the stronger all-round task scores; pick Qwen3.5-27B if you need lower cost or video input.
Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.
Who wins by task?
| Task | Anthropic: Claude Sonnet 5 | Qwen: Qwen3.5-27B |
|---|---|---|
| SQL Generation | 171 | 137 |
| Code Review | 167 | 137 |
| Code Completion | 119 | 129 |
| Code Refactoring | 164 | 136 |
| Bug Fixing | 180 | 141 |
| Unit Test Generation | 154 | 127 |
| Code Documentation | 141 | 130 |
| Regex Writing | 135 | 125 |
| CI/CD Pipelines | 144 | 123 |
| Frontend Component Design | 146 | 128 |
| Data Analysis | 171 | 132 |
| CSV / Spreadsheet Cleanup | 153 | 130 |
| ETL Scripting | 154 | 130 |
| JSON Extraction | 138 | 131 |
| Bulk Data Labeling | 124 | 129 |
| OCR / Document Parsing | 146 | 131 |
| Table Extraction from PDFs | 146 | 131 |
| Long-Document Summarization | 159 | 138 |
| Short-Form Summarization | 122 | 126 |
| Blog Post Writing | 140 | 125 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →