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Gemini 2.5 Flash-Lite Google Legacy GPT-6 Luna OpenAI
Input $0.10 $0.10
Output $0.40 $0.50
Blended $0.18 $0.20
Context window 1.05M 1.05M
Max output 66k 128k
Output speed 289.2 121.6
Quality 38.1 58
Reasoning 25.6 38.5
Coding 9.5 54.6
Value 53.5 71.2
Vision ✓ ✓
Reasoning ✓ ✓
Tool calling ✓ ✓
Structured output ✓ ✓
Prompt caching ✓ ✓
Batch API ✓ ✓
Licence Proprietary Proprietary
API model id gemini-2.5-flash-lite gpt-6-luna

At a glance

Input price, per million tokens
  1. Gemini 2.5 Flash-LiteGoogle$0.10
  2. GPT-6 LunaOpenAI$0.10
Output price, per million tokens
  1. Gemini 2.5 Flash-LiteGoogle$0.40
  2. GPT-6 LunaOpenAI$0.50
Context window
  1. Gemini 2.5 Flash-LiteGoogle1.05M
  2. GPT-6 LunaOpenAI1.05M

Popular comparisons

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Language models 77
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Voice and realtime 17
Embeddings 3