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Gemini 2.5 Flash Lite (09-2025) vs GPT 5.6 Luna

At a glance

Earlier Gemini 2.5 Flash Lite preview from September 2025.

1.0M ctx$0.10/$0.40 per M

OpenAI's fastest, most affordable GPT-5.6 tier for high-volume, latency-sensitive work.

1.1M ctx$1.00/$6.00 per M
Agent Demos
All agent demos

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AI Output
All AI outputs

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Benchmarks
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Reasoning
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-11
Reasoning & Knowledge
Graduate Science92.3%
Agentic
Terminal Tasks84.7%
Specs
1.0M
Context
66K
Max output
Sep 2025
Released
1.1M
Context
128K
Max output
Jul 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input90%$0.10/M tokens
Output93%$0.40/M tokens
Reasoning$0.40/M tokens
Cache read90%$0.01/M tokens
Cache write93%$0.08/M tokens
Image input$0.10/M tokens
Audio input$0.30/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input$1.00/M tokens
Output$6.00/M tokens
Cache read$0.10/M tokens
Cache write$1.25/M tokens
Web search29%$0.01/search
Chat with Gemini 2.5 Flash Lite (09-2025)Go to model
Chat with GPT 5.6 LunaGo to model
Frequently Asked Questions: Gemini 2.5 Flash Lite (09-2025) vs GPT 5.6 Luna▼

Which is better, Gemini 2.5 Flash Lite (09-2025) or GPT 5.6 Luna?

▼

Both Gemini 2.5 Flash Lite (09-2025) and GPT 5.6 Luna are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Gemini 2.5 Flash Lite (09-2025) or GPT 5.6 Luna?

▼

Gemini 2.5 Flash Lite (09-2025) has a lower blended cost. Gemini 2.5 Flash Lite (09-2025): $0.10 input / $0.40 output. GPT 5.6 Luna: $1.00 input / $6.00 output.

Which has a larger context window, Gemini 2.5 Flash Lite (09-2025) or GPT 5.6 Luna?

▼

GPT 5.6 Luna has a larger context window: Gemini 2.5 Flash Lite (09-2025) supports 1M tokens vs GPT 5.6 Luna at 1.1M tokens.

Do both Gemini 2.5 Flash Lite (09-2025) and GPT 5.6 Luna support vision?

▼

Yes, both Gemini 2.5 Flash Lite (09-2025) and GPT 5.6 Luna support vision/image input.

What are the key differences between Gemini 2.5 Flash Lite (09-2025) and GPT 5.6 Luna?

▼

Key differences: Gemini 2.5 Flash Lite (09-2025) is significantly cheaper. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Gemini 2.5 Flash Lite (09-2025) and GPT 5.6 Luna for free on idapt.app to see which performs better for your specific needs.

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