Phi 4 Reasoning
by Microsoft
Phi 4 Reasoning is a model from Microsoft, released on April 30, 2025. It ranks #153 of 220 models by Intelligence Score with a score of 12.
Phi-4-reasoning is a state-of-the-art open-weight reasoning model finetuned from Phi-4 using supervised fine-tuning on a dataset of chain-of-thought traces and reinforcement learning. It focuses on math, science, and coding skills.
Key specs
| Provider | Microsoft |
|---|---|
| Release date | 2025-04-30 |
| License | open source |
| Intelligence Score | 12 |
| Coding index | 6.3 |
Quick answers
Is Phi 4 Reasoning open source?
Yes. Phi 4 Reasoning is an open model released under the open source license.
When was Phi 4 Reasoning released?
Microsoft released Phi 4 Reasoning on April 30, 2025.
How does Phi 4 Reasoning compare to Claude Opus 5.5 (Reasoning)?
Phi 4 Reasoning scores 12 on the Intelligence Score versus 60.5 for Claude Opus 5.5 (Reasoning), the current #1.
Compare on the AI leaderboard · All AI models
More models from Microsoft
- MAI-Thinking-1 (Reasoning) — Microsoft
- MAI-Code-1-Flash (Reasoning) — Microsoft
- MAI-Code-1.1-Flash (Reasoning) — Microsoft
- Phi 4 Reasoning Plus — Microsoft
- Phi 4 Mini Reasoning — Microsoft
- Phi 4 — Microsoft