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Gemini 2.5 Flash Search vs GPT 5.6 Luna

Compare Gemini 2.5 Flash Search 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 2.5 Flash SearchOpenAIGPT 5.6 Luna
+ Add model · 2/4
Google logo
Gemini 2.5 Flash Search
Google · text, image, video, audio, pdf → text

gemini-2.5-flash-search integrates Google's official search functionality; the search feature will have an additional separate fee log directly incorporated into the scoring, with detailed logs not displayed; this will be fixed and displayed later; only supports OpenAI-compatible formats for invocation, does not support Gemini SDK; for Gemini's native SDK, please set parameters directly using the official search parameters.

Input$0.3 /M
Output$2.499 /M
Cache read$0.075 /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$1 /M
Output$6 /M
Cache read$0.1 /M
Details

Pricing & Specifications

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

Gemini 2.5 Flash Search
GPT 5.6 Luna
Input /M
$0.3
$1
Output /M
$2.499
$6
Cache read /M
$0.075
$0.1
Context length
1,048,576
1,050,000
Max output
65,536
128,000
Time to First Token
0.7 s
2.2 s
Throughput
54.6 tok/s
88.4 tok/s
Modalities
textimagevideoaudiopdf
textimage
Supported Parameters
webtoolsfunction callingstructured outputslong context
toolsthinkingstructured outputs
API Formats
chat_completions · responses
Released
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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-2.5-flash-searchgpt-5.6-luna

Tokens / day

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Requests / day

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Performance Past 3 Days

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

gemini-2.5-flash-searchgpt-5.6-luna

Throughput (tok/s)

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TTFT (s)

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Uptime (%)

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Cost calculator

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

Gemini 2.5 Flash Search
$55.49 /mo
GPT 5.6 Luna
$150 /mo

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

FAQ

Which is cheaper: Gemini 2.5 Flash Search, GPT 5.6 Luna?

Gemini 2.5 Flash Search: $2.499/M output tokens; GPT 5.6 Luna: $6/M. Use the cost calculator above to estimate your own workload.

Which responds faster?

Gemini 2.5 Flash Search: 0.7s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.

How large is each context window?

Gemini 2.5 Flash Search accepts 1,048,576 and GPT 5.6 Luna accepts 1,050,000 input tokens. Maximum output per request is 65,536 tokens on Gemini 2.5 Flash Search and 128,000 tokens on GPT 5.6 Luna.

Which one generates tokens faster?

GPT 5.6 Luna at 88.4 tok/s and Gemini 2.5 Flash Search at 54.6 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 2.5 Flash Search accepts text, image, video, audio and PDF input and supports web search, tool calling, function calling, structured outputs and long context; GPT 5.6 Luna accepts text and image input and supports tool calling, thinking and structured outputs.

Can I call Gemini 2.5 Flash Search 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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