Available now
Microsoft
phi-4-reasoning
TextReasoningOpen Weights32K
InputFree
OutputFree
Context32K
Endpointsopenai
Capabilities
Reasoning
Quick stats
Context window32K
Max output4.1K
Modechat
Performance
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§ 01
Pricing
| Input price | $0.00 · 1M tokens |
| Output price | $0.00 · 1M tokens |
| Context window | 32K tokens |
| Compatible endpoints | openai |
| Vendor | Microsoft |
§ 02
Call phi-4-reasoning from your code
Point any OpenAI-compatible SDK at UnoRouter and request the model by name. Replace YOUR_API_KEY with a real key from your dashboard.
bash
curl https://api.unorouter.com/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "phi-4-reasoning",
"messages": [{"role": "user", "content": "Hello!"}]
}'§ 03
Frequently asked questions
How much does phi-4-reasoning cost per 1M tokens?
Input is priced at $0.00 per 1M tokens, output at $0.00 per 1M tokens. Billing is per token, no rounding to batch sizes.
How do I access phi-4-reasoning via API?
Send requests to the UnoRouter /v1/chat/completions endpoint with model=phi-4-reasoning. Any OpenAI-compatible client library works. Authentication uses a standard Bearer token.
What is the context window of phi-4-reasoning?
phi-4-reasoning supports a context window of 32K tokens, shared between your prompt and the model's response.
§ 04
Similar models
Try phi-4-reasoning now
Create an API key and start making requests in under a minute.