Gemini 2.5 Flash vs GPT-5.6 Luna

Gemini 2.5 Flash leads in 5 of 8 categories

Arena ELO

Gemini 2.5 Flash

Cheaper

Gemini 2.5 Flash

Faster

Gemini 2.5 Flash

Detailed Comparison

Category	Gemini 2.5 Flash	GPT-5.6 Luna
Provider	Google	OpenAI
Context Window	1M WIN	128K
Input Price ($/1M)	$0.3 WIN	N/A
Output Price ($/1M)	$2.5 WIN	N/A
Arena ELO	1362 WIN	N/A
Coding	unknown	N/A
Reasoning	unknown	N/A
Speed (tokens/sec)	~150 t/s WIN	N/A
Open Source	No	No

Frequently Asked Questions

Which is better for coding, Gemini 2.5 Flash or GPT-5.6 Luna?

Gemini 2.5 Flash scores unknown on coding benchmarks, while GPT-5.6 Luna scores N/A.

Which has a larger context window?

Gemini 2.5 Flash supports 1M context, while GPT-5.6 Luna supports 128K.

Is Gemini 2.5 Flash or GPT-5.6 Luna open source?

Gemini 2.5 Flash is proprietary. GPT-5.6 Luna is proprietary.

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Gemini 3.5 Flash makes computer use a default, not a demo

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More Comparisons

Gemini 2.5 Flash vs Claude Opus 4.5 Gemini 2.5 Flash vs Llama 4 Scout Gemini 2.5 Flash vs Claude Sonnet 4.6 Gemini 2.5 Flash vs Claude Haiku 4.5 Gemini 2.5 Flash vs GLM-5.2 Gemini 2.5 Flash vs Qwen 3.6 Gemini 2.5 Flash vs Claude Fable 5 Gemini 2.5 Flash vs Kimi K2.7 Code GPT-5.6 Luna vs Claude Opus 4.5 GPT-5.6 Luna vs Llama 4 Scout GPT-5.6 Luna vs Claude Sonnet 4.6 GPT-5.6 Luna vs Claude Haiku 4.5 GPT-5.6 Luna vs GLM-5.2 GPT-5.6 Luna vs Qwen 3.6 GPT-5.6 Luna vs Claude Fable 5 GPT-5.6 Luna vs Kimi K2.7 Code