head-to-head
OpenAI: GPT-6 Sol Pro vs Z.ai: GLM 5.3 FlashX
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.
| OpenAI: GPT-6 Sol Pro | Z.ai: GLM 5.3 FlashX | |
|---|---|---|
| Vendor | openai | z-ai |
| Quality Score | 100 | 100 |
| Input Price | $2.00/M | $0.37/M |
| Output Price | $10.00/M | $1.25/M |
| Context Window | 1,050,000 | 1,048,576 |
| Max Output | 128,000 | 131,072 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
Who wins by task?
| Task | OpenAI: GPT-6 Sol Pro | Z.ai: GLM 5.3 FlashX |
|---|---|---|
| SQL Generation | 132 | 133 |
| Code Completion | 117 | 131 |
| Code Documentation | 129 | 131 |
| Regex Writing | 117 | 119 |
| CSV / Spreadsheet Cleanup | 132 | 133 |
| JSON Extraction | 121 | 131 |
| Bulk Data Labeling | 118 | 129 |
| Long-Document Summarization | 136 | 137 |
| Short-Form Summarization | 113 | 123 |
| Blog Post Writing | 120 | 121 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →
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