When was Phi 4 Reasoning Plus released?

Phi 4 Reasoning Plus was released on April 30, 2025 by Microsoft. This is the official Phi 4 Reasoning Plus release date tracked on LLM Stats.

How big is Phi 4 Reasoning Plus?

Phi 4 Reasoning Plus has 14 billion parameters. It was trained on 16 billion tokens. It ships as an open-weight model, so you can download and run it on your own hardware.

Who created Phi 4 Reasoning Plus?

Phi 4 Reasoning Plus was created by Microsoft.

What is the license for Phi 4 Reasoning Plus?

Phi 4 Reasoning Plus is released under the MIT license. This is an open-source / open-weight license that permits self-hosting.

What is the knowledge cutoff date for Phi 4 Reasoning Plus?

Phi 4 Reasoning Plus has a knowledge cutoff of March 2025, meaning it was trained on data up to that point and may not know about events after it.

Where is the Phi 4 Reasoning Plus paper or technical report?

Phi 4 Reasoning Plus has a paper or technical report available at https://arxiv.org/abs/2504.21318. Use that source for architecture, training, release and evaluation details.

What models should I compare Phi 4 Reasoning Plus against?

Common Phi 4 Reasoning Plus comparisons include Phi 4 Reasoning Plus vs Claude 3.5 Sonnet, Phi 4 Reasoning Plus vs Gemini 1.5 Pro, Phi 4 Reasoning Plus vs Claude Opus 4.1. Compare them side by side for benchmark scores, pricing, context window, latency and provider availability.

Phi 4 Reasoning Plus Benchmarks, Pricing & Context Window

Name: Phi 4 Reasoning Plus
Author: Microsoft

Phi 4 Reasoning Plus: Benchmarks, Pricing & Context Window

Phi 4 Reasoning Plus is a language model from Microsoft, released in April 2025.

Phi-4-reasoning-plus is a state-of-the-art open-weight reasoning model finetuned from Phi-4 using supervised fine-tuning and reinforcement learning. It focuses on math, science, and coding skills. This 'plus' version has higher accuracy

Phi 4 Reasoning Plus benchmarks

Capability tiers

Standing within each category, adjusted for leaderboard depth.

Real tasks performance

High-confidence performance for Phi 4 Reasoning Plus across real-world prompt categories. Only 95% intervals at most 4 points wide are shown.

Performance by conversation depth

How Phi 4 Reasoning Plus holds up as conversations get longer.

Quality Tracker

Phi 4 Reasoning Plus Performance Across Datasets

Scores sourced from the model's scorecard, paper, or official blog posts

llm-stats.com - Thu Oct 08 2026

Notice missing or incorrect data?

Phi 4 Reasoning Plus model size

Phi 4 Reasoning Plus has 14 billion parameters and was trained on 16 billion tokens. See how it compares to other models in the same parameter range.

ParametersTraining tokens

14B

16Btokens

1× tokens-to-params ratio

Medium (10–30B)

14B

1B7B70B405B

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Phi 4 Reasoning Plus latency

Phi 4 Reasoning Plus time to first token, sustained output throughput, and failed-request rate from live model usage over the trailing 7 days.

Phi 4 Reasoning Plus examples

Recent arena outputs from Phi 4 Reasoning Plus, picked from the highest-ranked matchups.

Phi 4 Reasoning Plus license

Phi 4 Reasoning Plus is released under the MIT license, which permits commercial use, has 14.0B parameters, has a knowledge cutoff of March 2025.

License: MIT; Commercial use allowed
Parameters: 14.0B
Knowledge cutoff: March 2025

MIT License - allows commercial use

Phi 4 Reasoning Plus resources

Official sources for Phi 4 Reasoning Plus: provider documentation, paper or system card, official launch post, model weights.

Phi 4 Reasoning Plus vs other models

The most-compared alternatives to Phi 4 Reasoning Plus are Claude 3.5 Sonnet, Gemini 1.5 Pro, Claude Opus 4.1. Open any pair side-by-side for benchmarks, pricing, context, and latency.