token.app › Compare › Gemini 3.8 Flash vs GPT-5.6 Luna
Gemini 3.8 Flash vs GPT-5.6 Luna
GPT-5.6 Luna is 3.7× cheaper per token on a blended 3:1 basis. GPT-5.6 Luna accepts the larger context window (1.1M).
Head to head
Blended price uses a 3:1 input:output mix
| Gemini 3.8 Flash | GPT-5.6 Luna | |
|---|---|---|
| Provider | OpenAI | |
| Input $/1M | $0.825 | $0.200 |
| Output $/1M | $4.13 | $1.20 |
| Blended $/1M | $1.65 | $0.450 |
| Context window | 1.0M | 1.1M |
| Max output | 66K | 128K |
| Released | Sep 2026 | Jul 2026 |
| Licence | Proprietary | Proprietary |
Choose Gemini 3.8 Flash if…
- Newer model (released Sep 2026)
Choose GPT-5.6 Luna if…
- Costs less per token — $0.450 vs $1.65 blended
- Larger context window (1.1M)
FAQ
Which is better, Gemini 3.8 Flash or GPT-5.6 Luna?
We do not hold independently-run benchmark scores covering both Gemini 3.8 Flash and GPT-5.6 Luna, so we make no quality claim. Their pricing and specifications are compared on this page.
Is Gemini 3.8 Flash cheaper than GPT-5.6 Luna?
GPT-5.6 Luna is cheaper: $0.450 versus $1.65 per million tokens blended at 3:1 input:output. Input alone: $0.825 vs $0.200. Output alone: $4.13 vs $1.20.
What context windows do Gemini 3.8 Flash and GPT-5.6 Luna have?
Gemini 3.8 Flash: 1,048,576 tokens. GPT-5.6 Luna: 1,050,000 tokens.
Who makes Gemini 3.8 Flash and GPT-5.6 Luna?
Gemini 3.8 Flash is made by Google. GPT-5.6 Luna is made by OpenAI.
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