Qwen: Qwen3.5-9B vs ByteDance Seed: Seed-2.0-Mini
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| Qwen: Qwen3.5-9B | ByteDance Seed: Seed-2.0-Mini | |
|---|---|---|
| Vendor | qwen | bytedance-seed |
| Quality Score | 100 | 100 |
| Benchmark Score | 31.3 | - |
| Input Price | $0.17/M | $0.10/M |
| Output Price | $0.25/M | $0.40/M |
| Context Window | 262,144 | 262,144 |
| Max Output | 235,929 | 131,072 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 35.4 | - |
| ai_index_agentic | 12.2 | - |
| ai_index_coding | 47.3 | - |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Seed-2.0-Mini costs $0.20 and Qwen3.5-9B costs $0.23, so Seed-2.0-Mini is slightly cheaper for the same work.
Both read up to 262,144 tokens at once, roughly 393 pages of text.
Across the 20 tasks where they differ, Qwen3.5-9B scores higher on 20 (SQL Generation, Code Review, Code Completion and others).
Qwen3.5-9B was released in March 2026 and Seed-2.0-Mini in February 2026.
Pick Qwen3.5-9B if you need the stronger all-round task scores; pick Seed-2.0-Mini if you need lower cost.
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 | Qwen: Qwen3.5-9B | ByteDance Seed: Seed-2.0-Mini |
|---|---|---|
| SQL Generation | 145 | 131 |
| Code Review | 139 | 126 |
| Code Completion | 129 | 129 |
| Code Refactoring | 138 | 127 |
| Bug Fixing | 145 | 130 |
| Unit Test Generation | 133 | 121 |
| Code Documentation | 130 | 126 |
| Regex Writing | 126 | 119 |
| CI/CD Pipelines | 126 | 117 |
| Frontend Component Design | 131 | 122 |
| Data Analysis | 140 | 124 |
| CSV / Spreadsheet Cleanup | 137 | 128 |
| ETL Scripting | 132 | 122 |
| JSON Extraction | 139 | 131 |
| Bulk Data Labeling | 132 | 129 |
| OCR / Document Parsing | 135 | 128 |
| Table Extraction from PDFs | 135 | 128 |
| Long-Document Summarization | 138 | 129 |
| Short-Form Summarization | 127 | 123 |
| Blog Post Writing | 126 | 119 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →