Microsoft model product
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 due to additional RL training but may have higher latency.
Updated Aug 10, 2026. Default version: Phi 4 Reasoning Plus
Structured fields from the published default version.
This profile uses the latest version under this unique model that has a calculated LLMBoard score. Arena and price are excluded.
Published benchmark records for the scored version Phi 4 Reasoning Plus.
| FlenQA | 1.0 | 1 | 2 | 100.0% | C | |
| OmniMath | 0.8 | 1 | 2 | 100.0% | C | |
| PhiBench | 0.7 | 1 | 3 | 100.0% | C | |
| Arena Hard | 0.8 | 7 | 26 | 76.0% | C | |
| HumanEval+ | 0.9 | 9 | 76 | 89.3% | C | |
| AIME 2024 | 0.8 | 24 | 53 | 55.8% | C | |
| IFEval | 0.8 | 38 | 65 | 42.2% | C | |
| LiveCodeBench | 0.5 | 42 | 73 | 43.1% | C | |
| MMLU-Pro | 0.8 | 68 | 129 | 47.7% | C | |
| AIME 2025 | 0.8 | 76 | 114 | 33.6% | C | |
| GPQA | 0.7 | 133 | 233 | 43.1% | C |
Preference and agent-evaluation signals from published Arena datasets.
The default version has no published Arena rows, or its source alias has not been resolved.
Official vendor API PAYG pricing is summarized first. The table then lists individual provider offerings without treating their minimum as the official price.
| Azure Cognitive Services | phi-4-reasoning-plus | global | $0.125 | $0.50 | 32K | |
| Azure | phi-4-reasoning-plus | global | $0.125 | $0.50 | 32K |
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
All published versions linked to this unique model. The score columns identify the version used by the current overall ranking.
| Phi 4 Reasoning Plus | 50.3 | 14B | N/A | N/A | No | MIT |
A concise description based on the published model registry.
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 due to additional RL training but may have higher latency.
Use the benchmark, Arena and pricing sections above as separate evidence. A missing field means the current data snapshot does not support that claim.
Data snapshot: 2026-08-07. Editorial model content is not available in the backend.
Open a comparison with the three ranked models immediately above and below this model.
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Common questions about Phi 4 Reasoning Plus.
Phi 4 Reasoning Plus's default version was released on Apr 30, 2025.
Phi 4 Reasoning Plus's official API price is $0.125 per million input tokens and $0.50 per million output tokens via Azure. The lowest tracked third-party offer starts at $0.125 input and $0.50 output via Azure Cognitive Services.
Phi 4 Reasoning Plus is published under Microsoft in the model registry.
The current registry does not publish a context window for the default version.
No. The default version is not marked as having publicly available weights.
2 published provider offerings are linked to the default version.
Nearby ranked alternatives include Kimi K2, GPT-4-Turbo, Mercury 2.