Model comparison

Gemini 3.6 Flash vs GPT-5.6 Luna

Compare Gemini 3.6 Flash (Google) and GPT-5.6 Luna (OpenAI) by price, context, capabilities, and latency.

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Price deadline

Gemini Flash prices rise Jan 1, 2027

Per Google's published pricing page, Gemini Flash input prices double on Jan 1, 2027. The same workload runs an order of magnitude cheaper on DeepSeek and GLM. Source: Google pricing Full price breakdown

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Which should you pick?

  • Price: GPT-5.6 Luna is cheaper ($0.2 / 1M tokens input / $1.20 / 1M tokens output) vs Gemini 3.6 Flash ($1.50 / 1M tokens input / $7.50 / 1M tokens output).

Side by side

Gemini 3.6 Flash vs GPT-5.6 Luna — full comparison

Compare price, provider, context, capabilities, latency, and source basis.

ModelProviderInputOutputContextCapabilitiesBest forLatencyStatusSource
Gemini 3.6 Flashgoogle/gemini-3.6-flashGoogle$1.50 / 1M tokens$7.50 / 1M tokens1M
StreamingTool callingJSON modeVision
image understanding, multimodal chat900-1711msCatalogPlatform curated
GPT-5.6 Lunaopenai/gpt-5.6-lunaOpenAIStarting at $0.2 / 1M tokens$1.20 / 1M tokens1M
StreamingTool callingJSON modeVision
image understanding, multimodal chat1396-2773msCatalogPlatform curated

FAQ

Gemini 3.6 Flash vs GPT-5.6 Luna FAQ

Is Gemini 3.6 Flash or GPT-5.6 Luna cheaper?

GPT-5.6 Luna is cheaper ($0.2 / 1M tokens input / $1.20 / 1M tokens output) vs Gemini 3.6 Flash ($1.50 / 1M tokens input / $7.50 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.

Which has a larger context window, Gemini 3.6 Flash or GPT-5.6 Luna?

Both offer the same context window: 1M tokens.

Gemini 3.6 Flash vs GPT-5.6 Luna for Vision: which should I pick?

Both target Vision. Pick GPT-5.6 Luna to optimize cost, or Gemini 3.6 Flash for the longer context window. Test both on real prompts before committing production traffic.

Gemini 3.6 Flash detailsGPT-5.6 Luna detailsPricing calculatorOpenAI-compatible quickstart