Phi 4

by Microsoft

Phi 4 is a model from Microsoft, released on December 12, 2024. It has a 16K-token context window and can generate up to 16K output tokens. API pricing is $0.07 per 1M input tokens and $0.14 per 1M output tokens. It ranks #170 of 220 models by Intelligence Score with a score of 5.4.

phi-4 is a state-of-the-art open model built to excel at advanced reasoning, coding, and knowledge tasks. It leverages a blend of synthetic data, filtered web data, academic texts, and supervised fine-tuning for precision, alignment, and safety.

Key specs

ProviderMicrosoft
Release date2024-12-12
Licenseopen source
Context window16K tokens
Max output16K tokens
Input price$0.07 / 1M tokens
Output price$0.14 / 1M tokens
Intelligence Score5.4
Coding index3.4

Quick answers

What is the context window of Phi 4?

Phi 4 has a context window of 16K tokens, with a maximum output of 16K tokens per response.

How much does Phi 4 cost?

Phi 4 costs $0.07 per 1M input tokens and $0.14 per 1M output tokens through the API.

Is Phi 4 open source?

Yes. Phi 4 is an open model released under the open source license.

When was Phi 4 released?

Microsoft released Phi 4 on December 12, 2024.

How does Phi 4 compare to Claude Opus 5.5 (Reasoning)?

Phi 4 scores 5.4 on the Intelligence Score versus 60.5 for Claude Opus 5.5 (Reasoning), the current #1. Input pricing is $0.07 vs $4 per 1M tokens.

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