Models

AIHubMix Phi 4 (reasoning) vs Step 3.7 Flash

Compare AIHubMix Phi 4 (reasoning) from Microsoft 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.

MicrosoftAIHubMix Phi 4 (reasoning)StepFunStep 3.7 Flash
Microsoft logo
AIHubMix Phi 4 (reasoning)
Microsoft · text → text

Phi-4-Reasoning is a state-of-the-art open-weight reasoning model finetuned from Phi-4 using supervised fine-tuning on a dataset of chain-of-thought traces and reinforcement learning. The supervised fine-tuning dataset includes a blend of synthetic prompts and high-quality filtered data from public domain websites, focused on math, science, and coding skills as well as alignment data for safety and Responsible AI. The goal of this approach was to ensure that small capable models were trained with data focused on high quality and advanced reasoning.

Input$0.2 /M
Output$0.2 /M
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

Pricing & Specifications

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

AIHubMix Phi 4 (reasoning)
Step 3.7 Flash
Input /M
$0.2
$0.22
Output /M
$0.2
$1.32
Cache read /M
-
$0.044
Context length
128,000
256,000
Max output
4,000
0
Time to First Token
-
1.4 s
Throughput
-
32.6 tok/s
Modalities
text
textimagevideo
Supported Parameters
thinking
API Formats
Released
-
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.

AiHubmix-Phi-4-reasoningstep-3.7-flash

Tokens / day

-

Requests / day

-

Performance Past 3 Days

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

AiHubmix-Phi-4-reasoningstep-3.7-flash

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

-

Cost calculator

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

AIHubMix Phi 4 (reasoning)
$15.00 /mo
Step 3.7 Flash
$33.00 /mo

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

FAQ

Which is cheaper: AIHubMix Phi 4 (reasoning), Step 3.7 Flash?

AIHubMix Phi 4 (reasoning): $0.2/M output tokens; Step 3.7 Flash: $1.32/M. Use the cost calculator above to estimate your own workload.

How large is each context window?

AIHubMix Phi 4 (reasoning) accepts 128,000 and Step 3.7 Flash accepts 256,000 input tokens.

What inputs and capabilities does each model support?

AIHubMix Phi 4 (reasoning) accepts text input and supports thinking; Step 3.7 Flash accepts text, image and video input.

Can I call AIHubMix Phi 4 (reasoning) 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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