Openintelligent123/Phi-4-reasoning-plus

TEXT GENERATIONPricing:Input $0.28 / Output $0.56Concurrent Unit Cost:1Model Size:14.7BQuant:FP8Context Size:32kPublished:Sep 2, 2026License:mitArchitecture:Transformer Open Weights Featherless Exclusive Cold

Openintelligent123/Phi-4-reasoning-plus is a 14.7 billion parameter dense decoder-only Transformer model developed by Microsoft Research. It is fine-tuned from Phi-4 using supervised fine-tuning and reinforcement learning, specifically optimized for advanced reasoning in math, science, and coding tasks. With a 32K token context length, it excels in scenarios requiring deep, multi-step reasoning and logical consistency, particularly in memory/compute-constrained and latency-bound environments.

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Model Overview

Openintelligent123/Phi-4-reasoning-plus is a 14.7 billion parameter language model developed by Microsoft Research, fine-tuned from the Phi-4 base model. It leverages supervised fine-tuning on a dataset of chain-of-thought traces and reinforcement learning, with a focus on high-quality data for advanced reasoning in math, science, and coding. The model is designed to generate responses with a distinct reasoning chain-of-thought block followed by a summarization block.

Key Capabilities & Features

  • Advanced Reasoning: Specifically optimized for complex reasoning and logic tasks in mathematics, science, and coding.
  • Chain-of-Thought (CoT) Generation: Produces detailed reasoning processes before providing solutions, enhancing transparency and accuracy.
  • Extended Context: Supports a 32K token context length, with experimental results showing promising coherence up to 64K tokens for multi-step reasoning.
  • Robust Safety Alignment: Incorporates supervised fine-tuning with Microsoft safety guidelines and undergoes extensive red-teaming for safety evaluation.
  • Performance: Outperforms significantly larger open-weight models on various reasoning benchmarks like AIME, OmniMath, and GPQA-Diamond, and shows strong generalization to algorithmic problems like 3SAT and TSP.

Ideal Use Cases

  • Research Acceleration: Serves as a building block for generative AI features and research in language models.
  • Resource-Constrained Environments: Suitable for applications with memory/compute limitations.
  • Latency-Bound Scenarios: Designed for use cases where response time is critical.
  • Educational & Problem-Solving Tools: Excellent for applications requiring detailed, step-by-step reasoning for complex problems.