Qwen: Qwen3.8 Max (0902) vs Z.ai: GLM 5.3 Flash
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-21.
| Qwen: Qwen3.8 Max (0902) | Z.ai: GLM 5.3 Flash | |
|---|---|---|
| Vendor | qwen | z-ai |
| Quality Score | 100 | 100 |
| Benchmark Score | 76.5 | 69.6 |
| Input Price | $2.00/M | $0.15/M |
| Output Price | $6.00/M | $0.50/M |
| Context Window | 1,000,000 | 1,048,576 |
| Max Output | 131,072 | 943,717 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 74.9 | 69.0 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, GLM 5.3 Flash costs $0.28 and Qwen3.8 Max (0902) costs $3.50, so GLM 5.3 Flash is about 12.7 times cheaper for the same work.
Both take in a similar amount of text: 1,000,000 and 1,048,576 tokens, about 1,500 and 1,573 pages.
On our blended benchmark score Qwen3.8 Max (0902) leads 76.5 to 69.6.
Across the 18 tasks where they differ, Qwen3.8 Max (0902) scores higher on 11 (Code Review, Code Refactoring, Bug Fixing and others), GLM 5.3 Flash on 7 (Code Completion, Code Documentation, Regex Writing and others).
Qwen3.8 Max (0902) was released in September 2026 and GLM 5.3 Flash in August 2026.
Pick Qwen3.8 Max (0902) if you need benchmark performance; pick GLM 5.3 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 | Qwen: Qwen3.8 Max (0902) | Z.ai: GLM 5.3 Flash |
|---|---|---|
| Code Review | 146 | 145 |
| Code Completion | 119 | 133 |
| Code Refactoring | 148 | 147 |
| Bug Fixing | 150 | 149 |
| Unit Test Generation | 133 | 132 |
| Code Documentation | 137 | 138 |
| Regex Writing | 125 | 126 |
| CI/CD Pipelines | 129 | 128 |
| Frontend Component Design | 131 | 130 |
| Data Analysis | 135 | 134 |
| CSV / Spreadsheet Cleanup | 136 | 136 |
| ETL Scripting | 138 | 137 |
| JSON Extraction | 122 | 131 |
| Bulk Data Labeling | 119 | 129 |
| OCR / Document Parsing | 134 | 134 |
| Table Extraction from PDFs | 134 | 134 |
| Long-Document Summarization | 149 | 149 |
| Short-Form Summarization | 118 | 127 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →