What is the context window of Microsoft: Phi 4?

Microsoft: Phi 4 supports a context window of 16K tokens.

Is Microsoft: Phi 4 free to use?

Microsoft: Phi 4 is a paid model. It costs $0.070 per million input tokens and $0.140 per million output tokens.

How is LLM API pricing calculated?

LLM pricing has two components: input tokens (everything you send) and output tokens (what the model generates). Total cost = (prompt tokens × input rate + output tokens × output rate) / 1,000,000 × number of requests.

Microsoft: Phi 4 API Pricing — $0.070 Input / $0.140 Output per 1M Tokens

Q: How much does Microsoft: Phi 4 cost?

Microsoft: Phi 4 costs $0.070 per million input tokens and $0.140 per million output tokens via OpenRouter. Pricing was last updated Oct 29, 2026.

Microsoft: Phi 4 by Microsoft — $0.070 input / $0.140 output per 1M tokens via OpenRouter. Context: 16K tokens. Pricing last updated Oct 29, 2026.

Input / 1M tokens

$0.070

Output / 1M tokens

$0.140

Provider

Microsoft

Context window

16K tokens

Via

OpenRouter

Cost at common usage volumes

Usage	Daily	Monthly
Chatbot (100/day)	$0.021	$0.63
Small app (1K/day)	$0.140	$4.20
Mid-scale (10K/day)	$2.10	$63.00
Large scale (100K/day)	$49.00	$1470.00

Model ID: microsoft/phi-4
Data source: OpenRouter public API — updated Oct 29, 2026.

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About Microsoft: Phi 4

Microsoft: Phi 4 is an LLM developed by Microsoft. Input costs $0.070 per million tokens and output costs $0.140 per million tokens via OpenRouter. It supports a context window of 16K tokens.

Pricing Details

Via the OpenRouter API:

Input tokens: $0.070 per 1 million tokens
Output tokens: $0.140 per 1 million tokens

A token is roughly 0.75 words. For context: a typical user message of 100 words is approximately 133 tokens; a 500-word system prompt is about 650 tokens.

How Much Does Microsoft: Phi 4 Cost?

For a typical chatbot application (1,000 requests/day, 1,000 prompt tokens and 500 output tokens per request):

Daily cost: $0.1400
Monthly cost: $4.200

Accessing Microsoft: Phi 4 via OpenRouter

OpenRouter provides a unified API for 200+ LLMs including Microsoft: Phi 4. You can use it with any OpenAI-compatible SDK by setting the base URL to https://openrouter.ai/api/v1 and using your OpenRouter API key. The model ID is microsoft/phi-4.

Compare Microsoft: Phi 4 with Other Models

Use the AI Model Cost Comparison tool to compare Microsoft: Phi 4 against GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, or any other model side by side. Or use the LLM API Cost Calculator to browse all 456+ models sorted by cost for your specific usage.

Frequently Asked Questions

Yes. Microsoft: Phi 4 is available on OpenRouter with the model ID microsoft/phi-4. OpenRouter provides a unified API compatible with OpenAI's SDK format.