AI Model Comparison

GPT-5.6 Luna vs Gemini 3.8 Flash

Compare API pricing for GPT-5.6 Luna and Gemini 3.8 Flash. See input and output token prices and understand which model may cost less for your workload.

OpenAI

GPT-5.6 Luna

Input / 1M tokens$0.20
Output / 1M tokens$1.20
View GPT-5.6 Luna calculator →

Google

Gemini 3.8 Flash

Input / 1M tokens$0.75
Output / 1M tokens$3.75
View Gemini 3.8 Flash calculator →

Pricing comparison

MetricGPT-5.6 LunaGemini 3.8 Flash
Input / 1M$0.20$0.75
Output / 1M$1.20$3.75

Which model is cheaper?

For input tokens, GPT-5.6 Luna costs 3.8× less than Gemini 3.8 Flash.

For output tokens, GPT-5.6 Luna costs 3.1× less than Gemini 3.8 Flash.

The best choice depends on your workload, token usage, model capabilities, and the quality requirements of your application.

Frequently asked questions

Which is cheaper, GPT-5.6 Luna or Gemini 3.8 Flash?

Compare both input and output token prices because the cheaper model can depend on your workload.

How can I calculate the actual API cost?

Use the model calculator to enter your requests, input tokens, and output tokens.