Microsoft model product
Phi 4 Reasoning Plus
Phi 4 Reasoning Plus is an open-weight reasoning model from Microsoft focused on math, science, and coding.
Updated Sep 8, 2026. Default version: Phi 4 Reasoning Plus
LLMBoard Score25.6Phi 4 Reasoning Plus
Coverage0%9 benchmark families
Context windowN/ATokens
Official input price$0.125Azure API
Phi 4 Reasoning Plus Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
Phi 4 Reasoning Plus Benchmark Results
Benchmark scores for Phi 4 Reasoning Plus.
Sort by
Benchmark | Score | Rank | Participants | Percentile | Evidence | Evaluated |
|---|
| BenchmarkFlenQA | Score97.90% | Rank01 | Participants2 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkOmniMath | Score81.90% | Rank01 | Participants2 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkPhiBench | Score74.20% | Rank01 | Participants3 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkHumanEval+ | Score92.30% | Rank02 | Participants10 | Percentile88.89% | EvidenceC | Evaluated |
| BenchmarkArena Hard | Score79.00% | Rank07 | Participants26 | Percentile76.00% | EvidenceC | Evaluated |
| BenchmarkAIME 2024 | Score81.30% | Rank24 | Participants53 | Percentile55.77% | EvidenceC | Evaluated |
| BenchmarkIFEval | Score84.90% | Rank39 | Participants68 | Percentile43.28% | EvidenceC | Evaluated |
| BenchmarkLiveCodeBench | Score53.10% | Rank44 | Participants75 | Percentile41.89% | EvidenceC | Evaluated |
| BenchmarkMMLU-Pro | Score76.00% | Rank74 | Participants138 | Percentile46.72% | EvidenceC | Evaluated |
| BenchmarkAIME 2025 | Score78.00% | Rank80 | Participants119 | Percentile33.05% | EvidenceC | Evaluated |
| BenchmarkGPQA | Score68.90% | Rank144 | Participants247 | Percentile41.87% | EvidenceC | Evaluated |
Phi 4 Reasoning Plus Arena Results
Preference and agent-evaluation results for the default version.
No Arena results
The default version does not have a matching Arena result yet.
Phi 4 Reasoning Plus Pricing
Official vendor API pricing appears first, followed by individual provider offers.
- Official API
- $0.125 input, $0.50 output per 1M
- Official provider
- Azure
- Lowest third-party
- From $0.125 input, $0.50 output per 1M via Azure Cognitive Services
- Tracked offerings
- 2
Sort by
Provider | Provider model ID | Region | Input / 1M | Output / 1M | Context | Updated |
|---|
| ProviderAzure Cognitive Services | Provider model IDphi-4-reasoning-plus | Regionglobal | Input / 1M$0.125 | Output / 1M$0.50 | Context32K | Updated |
| ProviderAzure | Provider model IDphi-4-reasoning-plus | Regionglobal | Input / 1M$0.125 | Output / 1M$0.50 | Context32K | Updated |
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
Phi 4 Reasoning Plus Runtime Performance
Provider-specific output speed and catalog latency for Phi 4 Reasoning Plus. Runtime does not affect the capability score.
No runtime data
No provider-specific speed or latency record is linked to the default version yet.
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
Phi 4 Reasoning Plus Specifications
Technical details for the model's default version.
- Version
- Phi 4 Reasoning Plus
- Released
- Apr 30, 2025
- Knowledge cutoff
- Mar 1, 2025
- Parameters
- 14B
- Context window
- N/A
- Max output
- N/A
- Inputs
- text
- Outputs
- text
- Open weights
- Yes
- License
- MIT
Phi 4 Reasoning Plus Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
Sort by
Version | Released | LLMBoard | Parameters | Context | Max output | Open weights | License |
|---|
| VersionPhi 4 Reasoning Plus | Released | LLMBoard25.59 | Parameters14B | ContextN/A | Max outputN/A | Open weightsYes | LicenseMIT |
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What is Phi 4 Reasoning Plus?
Key information about Phi 4 Reasoning Plus and its available data.
Phi 4 Reasoning Plus is an open-weight reasoning model fine-tuned from Phi-4 using supervised fine-tuning and reinforcement learning. Its additional reinforcement learning training improves accuracy but may increase latency.
Data as of 2026-09-08.
FAQ
Common questions about Phi 4 Reasoning Plus.
When was Phi 4 Reasoning Plus released?
Phi 4 Reasoning Plus's default version was released on Apr 30, 2025.
How much does Phi 4 Reasoning Plus cost?
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.
Who created Phi 4 Reasoning Plus?
Phi 4 Reasoning Plus was created by Microsoft.
What is the context window for Phi 4 Reasoning Plus?
A context window is not available for the default version.
Is Phi 4 Reasoning Plus open weight?
Yes. The default version is marked as open weight under MIT.