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Model garden Router · on request Dedicated · available

Phi 4 mini flash reasoning

Runs as your own dedicated GPU deployment, ready to launch from the wizard. Data stays in Europe.

Phi-4-mini-flash-reasoning is a lightweight open model built upon synthetic data with a focus on high-quality, reasoning dense data further finetuned for more advanced math reasoning capabilities. The model belongs to the Phi-4 model family and supports 64K token context length.

Start for free ← All models
microsoft/Phi-4-mini-flash-reasoning On request
text->text · microsoft · sovereign EU
Runs on EU infrastructure operated by European companies; US marketplace capacity is never part of this chain. Full chain
3.9B
Parameters
262K
Context window
16GB
Minimum VRAM
POST /api/v1/chat/completions On request

Specifications

Parameters 3.9B
Context window 262,144 tokens
Minimum VRAM 16 GB
Architecture Phi4FlashForCausalLM (vLLM)
License mit
Modality text->text
Released June 2025
Publisher microsoft ↗

Pricing

Shared router · per token
On request
Not available on the shared router. Pricing on request as a dedicated GPU deployment.
Dedicated GPU · per hour
from €0,59 per hour
Your own vLLM instance on European cloud (16 GB VRAM), billed hourly.

Shared EU router, pay-per-token, scale-to-zero. Dedicated GPU deployments are billed hourly, see pricing.

Bench index

Bench is our quality index for every model, 0 to 100. It rests on public measurements (Epoch AI with about 40 benchmarks, LiveBench, LMArena and more) and is refreshed every morning. Where nobody measures, it shows an estimate with a range.

~32.0 / 100 · Estimate

No public benchmark yet: estimated from size and release date.

Range 20.6 to 43.3

Sources: Epoch AI ↗ · LiveBench ↗ · LMArena ↗ · Refreshed daily, last on 04-10-2026

Call it now

Drop-in replacement for OpenAI: change only the base URL and API key. The Anthropic format (/v1/messages) is supported too.

curl https://hostyourai.com/api/v1/chat/completions \
  -H "Authorization: Bearer hyai-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "microsoft/Phi-4-mini-flash-reasoning",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Frequently asked questions

Can I run Phi 4 mini flash reasoning in the EU?

Yes. HostYourAI runs Phi 4 mini flash reasoning on GPUs in European datacenters via vLLM. Prompts and outputs never leave the EU and there is no US cloud provider in the chain.

Is hosting Phi 4 mini flash reasoning GDPR-compliant?

Yes. All processing happens inside the EU, a Data Processing Agreement (DPA) is available and the subprocessor list is public. Open-source weights also mean: no training on your data.

How much does Phi 4 mini flash reasoning cost?

Phi 4 mini flash reasoning is available on request: through the shared EU router after a quick chat, or as your own dedicated GPU deployment billed per hour. Tell us your use case and we will set it up for you.

Is the API OpenAI-compatible?

Yes. You use the standard OpenAI SDKs with a custom base URL (https://hostyourai.com/api/v1). The Anthropic Messages API is supported as a drop-in as well.

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