Author's Description
Phi-3 128K Medium is a powerful 14-billion parameter model designed for advanced language understanding, reasoning, and instruction following. Optimized through supervised fine-tuning and preference adjustments, it excels in tasks involving common sense, mathematics, logical reasoning, and code processing. At time of release, Phi-3 Medium demonstrated state-of-the-art performance among lightweight models. In the MMLU-Pro eval, the model even comes close to a Llama3 70B level of performance. For 4k context length, try [Phi-3 Medium 4K](/models/microsoft/phi-3-medium-4k-instruct).
Key Specifications
Supported Parameters
This model supports the following parameters:
Features
This model supports the following features:
Performance Summary
Microsoft's Phi-3 Medium 128K Instruct, released on May 23, 2024, is positioned as a powerful 14-billion parameter model optimized for advanced language understanding and reasoning. It consistently ranks among the fastest models and offers highly competitive pricing across all evaluated benchmarks. Despite its strong foundational claims and reported performance close to Llama3 70B in MMLU-Pro, the provided benchmark results indicate significant limitations in its current evaluated performance. The model achieved 0.0% accuracy across General Knowledge, Ethics, Instruction Following, Reasoning, and Coding benchmarks, suggesting a fundamental challenge in accurately addressing these diverse tasks. In Email Classification, it achieved a low 4.0% accuracy, placing it in the 4th percentile. While its speed and cost efficiency are exceptional, the lack of accurate responses across all tested categories is a critical weakness. This suggests that while the model is highly efficient in processing, its ability to generate correct or relevant outputs for these specific benchmarks is currently underdeveloped. Further evaluation with more detailed metrics beyond baseline accuracy would be beneficial to understand its true capabilities and identify areas for improvement.
Model Pricing
Current Pricing
Feature | Price (per 1M tokens) |
---|---|
Prompt | $1 |
Completion | $1 |
Price History
Available Endpoints
Provider | Endpoint Name | Context Length | Pricing (Input) | Pricing (Output) |
---|---|---|---|---|
Azure
|
Azure | microsoft/phi-3-medium-128k-instruct | 128K | $1 / 1M tokens | $1 / 1M tokens |
Benchmark Results
Benchmark | Category | Reasoning | Strategy | Free | Executions | Accuracy | Cost | Duration |
---|
Other Models by microsoft
|
Released | Params | Context |
|
Speed | Ability | Cost |
---|---|---|---|---|---|---|---|
Microsoft: Phi 4 Reasoning Plus | May 01, 2025 | ~14B | 32K |
Text input
Text output
|
★ | ★★★ | $$$$ |
Microsoft: MAI DS R1 | Apr 20, 2025 | — | 163K |
Text input
Text output
|
★★★★ | ★★★★★ | $$$ |
Microsoft: Phi 4 Multimodal Instruct | Mar 07, 2025 | ~5.6B | 131K |
Text input
Image input
Text output
|
★★ | ★★ | $$ |
Microsoft: Phi 4 | Jan 09, 2025 | ~14B | 16K |
Text input
Text output
|
★★★★ | ★★★★ | $$ |
Microsoft: Phi-3.5 Mini 128K Instruct | Aug 20, 2024 | ~3.8B | 128K |
Text input
Text output
|
★ | ★★ | $$ |
Microsoft: Phi-3 Mini 128K Instruct | May 25, 2024 | ~3.8B | 128K |
Text input
Text output
|
★★★ | ★★ | $$ |
WizardLM-2 8x22B | Apr 15, 2024 | 22B | 65K |
Text input
Text output
|
★★★ | ★★ | $$$ |