head-to-head
Google: Gemini 3.6 Flash vs OpenAI: GPT-5.6 Luna
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-08-13.
| Google: Gemini 3.6 Flash | OpenAI: GPT-5.6 Luna | |
|---|---|---|
| Vendor | openai | |
| Quality Score | 100 | 100 |
| Benchmark Score | 84.4 | 88.2 |
| Input Price | $1.50/M | $0.10/M |
| Output Price | $7.50/M | $0.60/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 | 85.1 | 86.3 |
| ai_index_agentic | 66.8 | 77.4 |
| ai_index_coding | 100.0 | 100.0 |
Who wins by task?
| Task | Google: Gemini 3.6 Flash | OpenAI: GPT-5.6 Luna |
|---|---|---|
| SQL Generation | 169 | 172 |
| Code Review | 165 | 167 |
| Code Completion | 119 | 133 |
| Code Refactoring | 163 | 164 |
| Bug Fixing | 178 | 180 |
| Unit Test Generation | 153 | 154 |
| Code Documentation | 141 | 143 |
| Regex Writing | 134 | 137 |
| CI/CD Pipelines | 143 | 144 |
| Frontend Component Design | 145 | 146 |
| Data Analysis | 168 | 171 |
| CSV / Spreadsheet Cleanup | 153 | 154 |
| ETL Scripting | 153 | 154 |
| JSON Extraction | 139 | 149 |
| Bulk Data Labeling | 125 | 135 |
| OCR / Document Parsing | 146 | 146 |
| Table Extraction from PDFs | 146 | 146 |
| Long-Document Summarization | 158 | 160 |
| Short-Form Summarization | 122 | 132 |
| Blog Post Writing | 139 | 140 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →
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