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Google: Gemini 3.6 Flash vs OpenAI: GPT-5.6 Luna

google logoGoogle: Gemini 3.6 Flashgoogle/gemini-3.6-flashVSopenai logoOpenAI: GPT-5.6 Lunaopenai/gpt-5.6-luna

OpenAI: GPT-5.6 Luna wins on more metrics (6 of 9), but the right pick depends on what you optimize for — see the breakdown below.

MetricGoogle: Gemini 3.6 FlashOpenAI: GPT-5.6 Luna
Intelligence Index50.151.2✓
Coding Index69.271.4✓
GPQA Diamond93%✓91%
Design Arena Elo—1265✓
Speed (tokens/sec)175✓80
Latency1.7s✓1.8s
Input price /M$1.50$1.00✓
Output price /M$7.50$6.00✓
Context window1.0M1.1M✓
CapabilitiesReasoningToolsJSONVisionAudioReasoningToolsJSONVision
Google: Gemini 3.6 Flash details →OpenAI: GPT-5.6 Luna details →