Google: Gemini 3.1 Pro Preview vs ByteDance Seed: Seed 1.6 Flash
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| Google: Gemini 3.1 Pro Preview | ByteDance Seed: Seed 1.6 Flash | |
|---|---|---|
| Vendor | bytedance-seed | |
| Quality Score | 100 | 100 |
| Benchmark Score | 74.7 | - |
| Input Price | $2.00/M | $0.07/M |
| Output Price | $12.00/M | $0.30/M |
| Context Window | 1,048,576 | 262,144 |
| Max Output | 65,536 | 32,768 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | ✓ | - |
| Benchmark Scores | ||
| ai_index | 76.7 | - |
| ai_index_agentic | 35.3 | - |
| ai_index_coding | 100.0 | - |
| eqbench | 64.7 | - |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Seed 1.6 Flash costs $0.15 and Gemini 3.1 Pro Preview costs $5.00, so Seed 1.6 Flash is about 33.3 times cheaper for the same work.
Gemini 3.1 Pro Preview reads up to 1,048,576 tokens at once, roughly 1,573 pages of text, against about 393 pages for Seed 1.6 Flash.
Only Gemini 3.1 Pro Preview offers audio input.
Across the 20 tasks where they differ, Gemini 3.1 Pro Preview scores higher on 17 (SQL Generation, Code Review, Code Refactoring and others), Seed 1.6 Flash on 3 (Code Completion, Bulk Data Labeling, Short-Form Summarization).
Gemini 3.1 Pro Preview was released in February 2026 and Seed 1.6 Flash in December 2025.
Pick Gemini 3.1 Pro Preview if you need long documents, audio input or the stronger all-round task scores; pick Seed 1.6 Flash 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 | Google: Gemini 3.1 Pro Preview | ByteDance Seed: Seed 1.6 Flash |
|---|---|---|
| SQL Generation | 168 | 131 |
| Code Review | 168 | 126 |
| Code Completion | 120 | 129 |
| Code Refactoring | 168 | 127 |
| Bug Fixing | 177 | 130 |
| Unit Test Generation | 154 | 121 |
| Code Documentation | 144 | 126 |
| Regex Writing | 133 | 119 |
| CI/CD Pipelines | 145 | 117 |
| Frontend Component Design | 145 | 122 |
| Data Analysis | 164 | 124 |
| CSV / Spreadsheet Cleanup | 155 | 128 |
| ETL Scripting | 156 | 122 |
| JSON Extraction | 137 | 131 |
| Bulk Data Labeling | 123 | 129 |
| OCR / Document Parsing | 147 | 128 |
| Table Extraction from PDFs | 147 | 128 |
| Long-Document Summarization | 163 | 129 |
| Short-Form Summarization | 121 | 123 |
| Blog Post Writing | 140 | 119 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →