ByteDance Seed: Seed-2.0-Lite vs Qwen: Qwen3.5-Flash
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| ByteDance Seed: Seed-2.0-Lite | Qwen: Qwen3.5-Flash | |
|---|---|---|
| Vendor | bytedance-seed | qwen |
| Quality Score | 100 | 100 |
| Input Price | $0.25/M | $0.07/M |
| Output Price | $2.00/M | $0.26/M |
| Context Window | 262,144 | 1,000,000 |
| Max Output | 131,072 | 65,536 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Qwen3.5-Flash costs $0.13 and Seed-2.0-Lite costs $0.75, so Qwen3.5-Flash is about 5.8 times cheaper for the same work.
Qwen3.5-Flash reads up to 1,000,000 tokens at once, roughly 1,500 pages of text, against about 393 pages for Seed-2.0-Lite.
Across the 18 tasks where they differ, Qwen3.5-Flash on 18 (SQL Generation, Code Review, Code Completion and others).
Seed-2.0-Lite was released in March 2026 and Qwen3.5-Flash in February 2026.
Pick Qwen3.5-Flash if you need lower cost, long documents or the stronger all-round task scores.
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 | ByteDance Seed: Seed-2.0-Lite | Qwen: Qwen3.5-Flash |
|---|---|---|
| SQL Generation | 131 | 134 |
| Code Review | 126 | 132 |
| Code Completion | 128 | 131 |
| Code Refactoring | 127 | 136 |
| Bug Fixing | 130 | 136 |
| Unit Test Generation | 121 | 124 |
| Code Documentation | 126 | 131 |
| Regex Writing | 119 | 119 |
| CI/CD Pipelines | 117 | 120 |
| CSV / Spreadsheet Cleanup | 128 | 134 |
| ETL Scripting | 122 | 128 |
| JSON Extraction | 131 | 131 |
| Bulk Data Labeling | 129 | 129 |
| OCR / Document Parsing | 128 | 131 |
| Table Extraction from PDFs | 128 | 131 |
| Long-Document Summarization | 129 | 138 |
| Short-Form Summarization | 123 | 123 |
| Blog Post Writing | 119 | 122 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →