LLM Comparison
Gemini 3.6 Flash vs GPT-5.6 Luna
Side-by-side specs, pricing & capabilities · Updated August 2026
Price vs Intelligence
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2/6 models| Organization | ||
| OpenTools Score | 49 11.0 | 36 10.3 |
| Family | Gemini | GPT-5.6 |
| Status | Current | Current |
| Release Date | Jul 2026 | Jul 2026 |
| Context Window | 1.0M tokens | 1.1M tokens |
| Input Price | $1.50/M tokens | $1.00/M tokens |
| Output Price | $7.50/M tokens | $6.00/M tokens |
| Pricing Notes | DeepMind model page lists $1.50 input and $7.50 output per 1M tokens with no caching in the performance table. The ai.google.dev API docs were attempted through ScrapingBee and returned HTTP 400, so exact billing details beyond the official DeepMind price table were not used. | OpenAI pricing page lists $1 input and $6 output per 1M tokens, plus GPT-5.6 cache-write and cache-read pricing. |
| Capabilities | textvisionaudio-inputvideo-inputpdf-inputreasoningcodingtool-usesearch-groundingcomputer-usestructured-output | textvisionreasoningcodingtool-useweb-searchfile-searchcomputer-useagents |
| Max Output | 64K tokens | 128K tokens |
| API Identifier | gemini-3.6-flash | gpt-5.6-luna |
| Benchmarks | ||
| Artificial Analysis Intelligence Index | 50artificial-analysis | 51artificial-analysis |
| SWE-Bench Pro | 58.7google-deepmind | — |
| Terminal-Bench 2.1 | 78google-deepmind | — |
| GDPVal-AA v2 | 1421google-deepmind | — |
| Artificial Analysis Coding Agent Index | — | 74.6artificial-analysis |
| View Gemini 3.6 Flash | View GPT-5.6 Luna | |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| GPT-5.6 LunaCheapest | $1.00 | $3.00 | $4.00 | — |
| Gemini 3.6 Flash | $1.50 | $3.75 | $5.25 | +31% |
Gemini 3.6 Flash
Gemini 3.6 Flash is Google DeepMind general availability Flash model for coding, agentic execution, spatial reasoning, multimodal understanding, and long-context production workflows. Official DeepMind evidence lists 1M input tokens, 64k output tokens, text, image, video, audio, and PDF inputs, text output, tool use, Gemini API availability, and $1.50 input / $7.50 output pricing per million tokens.
OpenAI
GPT-5.6 Luna
GPT-5.6 Luna is OpenAI lower-cost GPT-5.6 model for high-volume reasoning, coding, and agentic workloads. OpenAI model docs list the same 1.05M token context window, 128K max output, and major tool support as the larger GPT-5.6 variants.
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