Phi 4

Name: Phi 4
Author: Microsoft

Free right now Mid-size New

ReasoningOpen weights

Phi 4 is a language model with 14B parameters from Microsoft. It is currently free at 1 provider with up to 16K tokens of context. The model supports step-by-step reasoning. Its weights are open, so it can also run locally.

Developer: Microsoft
Parameters: 14B
Context: 16K tokens
Type: Text
License: Open weights
Free since: November 1, 2026

Where to use Phi 4 for free

Each row is a separate free endpoint with its own limits.

Provider	Context	Limit	Card
UnoRouter `phi-4:free`	16K	No-card free models use shared capacity and per-model limits; availability can change.	No	Open

Quick start

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

from openai import OpenAI

client = OpenAI(
    base_url="https://api.unorouter.com/v1",
    api_key="YOUR_UNOROUTER_API_KEY",
)
reply = client.chat.completions.create(
    model="phi-4:free",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(reply.choices[0].message.content)

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.unorouter.com/v1",
  apiKey: process.env.UNOROUTER_API_KEY,
});
const reply = await client.chat.completions.create({
  model: "phi-4:free",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(reply.choices[0].message.content);

Example for UnoRouter. Any OpenAI-compatible client works: Cursor, Cline, OpenCode, Open WebUI.