head-to-head
Google: Gemini 3.6 Flash vs OpenAI: GPT-5.6 Luna Pro
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-07.
| Google: Gemini 3.6 Flash | OpenAI: GPT-5.6 Luna Pro | |
|---|---|---|
| Vendor | openai | |
| Quality Score | 100 | 100 |
| Benchmark Score | 73.8 | - |
| Input Price | $0.75/M | $0.20/M |
| Output Price | $3.75/M | $1.20/M |
| Context Window | 1,048,576 | 1,050,000 |
| Max Output | 65,536 | 128,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | ✓ | - |
| Benchmark Scores | ||
| ai_index | 66.5 | - |
| ai_index_agentic | 50.1 | - |
| ai_index_coding | 100.0 | - |
Who wins by task?
| Task | Google: Gemini 3.6 Flash | OpenAI: GPT-5.6 Luna Pro |
|---|---|---|
| SQL Generation | 165 | 133 |
| Code Review | 160 | 132 |
| Code Completion | 132 | 131 |
| Code Refactoring | 159 | 136 |
| Bug Fixing | 171 | 136 |
| Unit Test Generation | 150 | 124 |
| Code Documentation | 140 | 131 |
| Regex Writing | 132 | 119 |
| CI/CD Pipelines | 140 | 120 |
| Frontend Component Design | 142 | 122 |
| Data Analysis | 162 | 124 |
| CSV / Spreadsheet Cleanup | 152 | 133 |
| ETL Scripting | 149 | 128 |
| JSON Extraction | 147 | 131 |
| Bulk Data Labeling | 134 | 129 |
| OCR / Document Parsing | 145 | 131 |
| Table Extraction from PDFs | 145 | 131 |
| Long-Document Summarization | 155 | 137 |
| Short-Form Summarization | 129 | 123 |
| Blog Post Writing | 136 | 121 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →
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