head-to-head
OpenAI: GPT-6 Luna (batch) vs Z.ai: GLM 5.3 Flash (batch)
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.
| OpenAI: GPT-6 Luna (batch) | Z.ai: GLM 5.3 Flash (batch) | |
|---|---|---|
| Vendor | openai | z-ai |
| Quality Score | 100 | 100 |
| Benchmark Score | 62.2 | 70.6 |
| Input Price | $0.05/M | $0.06/M |
| Output Price | $0.25/M | $0.20/M |
| Context Window | 1,050,000 | 1,048,576 |
| Max Output | 128,000 | 131,072 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 61.5 | 69.0 |
Who wins by task?
| Task | OpenAI: GPT-6 Luna (batch) | Z.ai: GLM 5.3 Flash (batch) |
|---|---|---|
| SQL Generation | 141 | 142 |
| Code Review | 143 | 145 |
| Code Completion | 133 | 133 |
| Code Refactoring | 145 | 147 |
| Bug Fixing | 147 | 149 |
| Unit Test Generation | 131 | 132 |
| Code Documentation | 137 | 138 |
| Regex Writing | 126 | 126 |
| CI/CD Pipelines | 127 | 128 |
| Frontend Component Design | 129 | 130 |
| Data Analysis | 133 | 134 |
| CSV / Spreadsheet Cleanup | 136 | 136 |
| ETL Scripting | 136 | 137 |
| OCR / Document Parsing | 134 | 134 |
| Table Extraction from PDFs | 134 | 134 |
| Long-Document Summarization | 147 | 149 |
| Short-Form Summarization | 127 | 127 |
| Blog Post Writing | 129 | 130 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →
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