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Gemini 2.0 Flash Exp vs GPT 5.6 Luna

Compare Gemini 2.0 Flash Exp from Google and GPT 5.6 Luna from OpenAI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.

GoogleGemini 2.0 Flash ExpOpenAIGPT 5.6 Luna
+ Add model · 2/4
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Gemini 2.0 Flash Exp
Google · text, image, audio, video → text

https://doc.aihubmix.com/en/api/Gemini%20%E5%9B%BE%E7%89%87%E7%94%9F%E6%88%90%E5%92%8C%E7%BC%96%E8%BE%91 Instructions: Need to add parameters to experience new features: "modalities":["text","image"] Images are passed and output in Base64 encoding As an experimental model, it's recommended to explicitly specify "output image", otherwise it might only output text Default height for output images is 1024px Python calls require the latest OpenAI SDK, run pip install -U openai first

Input$0.02 /M
Output$0.08 /M
Details
OpenAI logo
GPT 5.6 Luna
OpenAI · text, image → text

GPT-5.6 Luna is designed for cost-sensitive, high-volume workloads. It roughly corresponds to the nano model tier used in earlier GPT-5 families.

Input$0.2 /M
Output$1.2 /M
Cache read$0.02 /M
Details

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

Gemini 2.0 Flash Exp
GPT 5.6 Luna
Input /M
$0.02
$0.2
Output /M
$0.08
$1.2
Cache read /M
-
$0.02
Context length
0
1,050,000
Max output
0
128,000
Time to First Token
0.5 s
5.0 s
Throughput
200.0 tok/s
47.2 tok/s
Modalities
textimageaudiovideo
textimage
Supported Parameters
long context
toolsthinkingstructured outputs
API Formats
chat_completions · responses
Released
-
July 9, 2026

Promotional prices show the discounted rate; see each model page for promotion windows.

Activity Past 30 Days

Daily traffic served through AIHubMix — how demand for each model is trending.

gemini-2.0-flash-expgpt-5.6-luna

Tokens / day

-

Requests / day

-

Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

gemini-2.0-flash-expgpt-5.6-luna

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

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Cost calculator

Estimate your monthly bill for the same workload on each model.

Gemini 2.0 Flash Exp
$2.40 /mo
GPT 5.6 Luna
$30.00 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

Which is cheaper: Gemini 2.0 Flash Exp, GPT 5.6 Luna?

Gemini 2.0 Flash Exp: $0.08/M output tokens; GPT 5.6 Luna: $1.2/M. Use the cost calculator above to estimate your own workload.

Which responds faster?

Gemini 2.0 Flash Exp: 0.5s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.

Which one generates tokens faster?

Gemini 2.0 Flash Exp at 200.0 tok/s and GPT 5.6 Luna at 47.2 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

Gemini 2.0 Flash Exp accepts text, image, audio and video input and supports long context; GPT 5.6 Luna accepts text and image input and supports tool calling, thinking and structured outputs.

Can I call Gemini 2.0 Flash Exp and GPT 5.6 Luna with the same API key?

Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.

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