Google: Gemini 3.1 Pro Preview vs Qwen: Qwen3.5 Plus 2026-02-15
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| Google: Gemini 3.1 Pro Preview | Qwen: Qwen3.5 Plus 2026-02-15 | |
|---|---|---|
| Vendor | qwen | |
| Quality Score | 100 | 100 |
| Benchmark Score | 74.7 | - |
| Input Price | $2.00/M | $0.26/M |
| Output Price | $12.00/M | $1.56/M |
| Context Window | 1,048,576 | 1,000,000 |
| Max Output | 65,536 | 65,536 |
| 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, Qwen3.5 Plus 2026-02-15 costs $0.65 and Gemini 3.1 Pro Preview costs $5.00, so Qwen3.5 Plus 2026-02-15 is about 7.7 times cheaper for the same work.
Both take in a similar amount of text: 1,048,576 and 1,000,000 tokens, about 1,573 and 1,500 pages.
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), Qwen3.5 Plus 2026-02-15 on 3 (Code Completion, Bulk Data Labeling, Short-Form Summarization).
Pick Gemini 3.1 Pro Preview if you need audio input or the stronger all-round task scores; pick Qwen3.5 Plus 2026-02-15 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 | Qwen: Qwen3.5 Plus 2026-02-15 |
|---|---|---|
| SQL Generation | 168 | 133 |
| Code Review | 168 | 132 |
| Code Completion | 120 | 131 |
| Code Refactoring | 168 | 136 |
| Bug Fixing | 177 | 136 |
| Unit Test Generation | 154 | 124 |
| Code Documentation | 144 | 131 |
| Regex Writing | 133 | 119 |
| CI/CD Pipelines | 145 | 120 |
| Frontend Component Design | 145 | 122 |
| Data Analysis | 164 | 124 |
| CSV / Spreadsheet Cleanup | 155 | 133 |
| ETL Scripting | 156 | 128 |
| JSON Extraction | 137 | 131 |
| Bulk Data Labeling | 123 | 129 |
| OCR / Document Parsing | 147 | 131 |
| Table Extraction from PDFs | 147 | 131 |
| Long-Document Summarization | 163 | 137 |
| Short-Form Summarization | 121 | 123 |
| Blog Post Writing | 140 | 121 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →