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Gemini 2.5 Pro vs Step 3.7 Flash

Compare Gemini 2.5 Pro from Google and Step 3.7 Flash from StepFun 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 ProStepFunStep 3.7 Flash
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Google logo
Gemini 2.5 Pro
Google · text, image, video, audio, pdf → text

Gemini 2.5 Pro is an advanced reasoning model developed by Google, optimized for solving highly complex problems across multiple domains. It can deeply understand large-scale information from diverse sources, including text, audio, images, video, and even entire codebases. The model demonstrates strong reasoning capabilities in coding, mathematics, and STEM-related tasks, and supports long-context analysis for large datasets, codebases, and technical documentation.

Input$1.25 /M
Output$10 /M
Cache read$0.125 /M
Details
StepFun logo
Step 3.7 Flash
StepFun · text, image, video → text

step-3.7-flash is stepfun's flagship inference model, designed for high-complexity tasks that require deep reasoning and fast execution. It excels at decomposing multi-step problems, performing tool calls, and maintaining consistency across massive datasets. It is the preferred choice for complex workloads such as long-context agents, advanced software engineering, and end-to-end research automation.

Input$0.22 /M
Output$1.32 /M
Cache read$0.044 /M
Details

Pricing & Specifications

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

Gemini 2.5 Pro
Step 3.7 Flash
Input /M
$1.25
$0.22
Output /M
$10
$1.32
Cache read /M
$0.125
$0.044
Context length
1,048,576
256,000
Max output
65,536
0
Time to First Token
2.6 s
1.4 s
Throughput
69.6 tok/s
32.6 tok/s
Modalities
textimagevideoaudiopdf
textimagevideo
Supported Parameters
toolsfunction callingstructured outputslong contextwebthinkingdeepsearch
API Formats
Released
June 17, 2025
May 29, 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-2.5-prostep-3.7-flash

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-prostep-3.7-flash

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.

Step 3.7 Flash
$33.00 /mo
Gemini 2.5 Pro
$225 /mo

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

FAQ

Which is cheaper: Gemini 2.5 Pro, Step 3.7 Flash?

Step 3.7 Flash: $1.32/M output tokens; Gemini 2.5 Pro: $10/M. Use the cost calculator above to estimate your own workload.

Which responds faster?

Step 3.7 Flash: 1.4s 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 Pro accepts 1,048,576 and Step 3.7 Flash accepts 256,000 input tokens.

Which one generates tokens faster?

Gemini 2.5 Pro at 69.6 tok/s and Step 3.7 Flash at 32.6 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 Pro accepts text, image, video, audio and PDF input and supports tool calling, function calling, structured outputs, long context, web search, thinking and deep search; Step 3.7 Flash accepts text, image and video input.

Can I call Gemini 2.5 Pro and Step 3.7 Flash 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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