Title: Phi 4 Mini Reasoning %E2%80%94 phi-4-mini-reasoning
Canonical: https://llmeu.com/en/models/phi-4-mini-reasoning/
Markdown mirror: https://llmeu.com/en/models/phi-4-mini-reasoning.md
Machine-readable: https://llmeu.com/llms.txt (index) - https://llmeu.com/llms-full.txt (full catalogue) - https://llmeu.com/llms-catalogue.json
Provider: Microsoft
Licence: mit
Hosting: catalogue only %E2%80%94 not hosted on LLM EU yet
Sources: https://huggingface.co/microsoft/Phi-4-mini-reasoning https://huggingface.co/api/models/microsoft/Phi-4-mini-reasoning?blobs=true https://huggingface.co/microsoft/Phi-4-mini-instruct-reasoning/resolve/main/LICENSE

# Phi 4 Mini Reasoning

[Microsoft](/en/providers/microsoft/)

Last reviewed: 14 Oct 2026

## Sovereignty and hosting

This model is catalogued for reference. It is not hosted on LLM EU yet, and no first-party endpoint serves it here. Requests to it go to the provider directly, under that provider's own terms.

## Summary

Phi 4 Mini Reasoning is published by Microsoft as open weights with 3.8B parameters under MIT. It takes text and returns text. The published configuration records no context window, so this card carries none. The checkpoint is instruction-tuned and ships a chat template. The card is catalogue-only: LLM EU does not run this model. The publisher lists 2 languages, 1 of them among the languages the European Union publishes in.

## Specifications

- Provider
  Microsoft (US)
- Context window
  Not verified: the provider has not documented this claim.
- Parameters
  3.8B
- Modalities
  text
- License
  mit %C2%B7 [licence](https://huggingface.co/microsoft/Phi-4-mini-instruct-reasoning/resolve/main/LICENSE)
- Open weights
  yes
- Release date
  29 Apr 2025
- Tasks
  [Reasoning](/en/tasks/reasoning/)

## Languages

**Strong:** en

**Adequate:** nlp

#### Strong

- en

#### Adequate

- nlp

Not verified: the provider has not documented this claim. %E2%80%94 a language is listed as strong only where a source claims it; the card links the evidence where one exists.

## When to use it

#### Strengths

- open weights are published on Hugging Face and can be downloaded without a vendor agreement
- mit licence, so commercial self-hosting is permitted without a separate agreement
- at 3.8B parameters it fits on a single accelerator
- the model page lists en
- instruction-tuned checkpoint with a chat template in the repository

#### Limits

- catalogue only %E2%80%94 LLM EU does not run this model, and nothing on this card implies an LLM EU endpoint
- no evaluation has been run by LLM EU
- the published configuration records no context window, so the card carries none
- at 3.8B parameters, the weights fit on a single modest accelerator

### Pricing

This model is catalogued for reference. It is not hosted on LLM EU yet, and no first-party endpoint serves it here. Requests to it go to the provider directly, under that provider's own terms.

### Verification status

Where a field has no source, the card shows it as unverified instead of filling it in. An empty field is information.

LLM EU Verified means documented, not legally certified. It is not an AI Act conformity assessment and LLM EU is not an EU body.

### Versions and variants

- catalogue %C2%B7 Catalogue only %C2%B7 [weights](https://huggingface.co/microsoft/Phi-4-mini-reasoning)

### Example request

```
curl https://api.llmeu.com/v1/chat/completions \
  -H "Authorization: Bearer $LLMEU_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"phi-4-mini-reasoning","messages":[{"role":"user","content":"Hello"}]}'
```

No playground is deployed for this model: no endpoint serves it, so a request would have nowhere to go.

### Benchmarks

No published evaluation. This is a gap, not a hidden result.

### Sources

- [huggingface.co](https://huggingface.co/microsoft/Phi-4-mini-reasoning)
- [huggingface.co](https://huggingface.co/api/models/microsoft/Phi-4-mini-reasoning?blobs=true)
- [huggingface.co](https://huggingface.co/microsoft/Phi-4-mini-instruct-reasoning/resolve/main/LICENSE)

### Card changelog

- 29 Apr 2025 %E2%80%94 Release date
- 14 Oct 2026 %E2%80%94 Last reviewed

Last reviewed: 14 Oct 2026