Phi-3 Models by Microsoft Research
Last refreshed 2026-10-05. Next refresh: weekly.
Details
Capabilities
About
The Phi-3 family, developed by Microsoft, consists of small language models (SLMs) optimized for Azure AI 1. These models are known for their capability and cost-effectiveness, outperforming larger models in tasks such as language processing, reasoning, coding, and math 1. The Phi-3 lineup includes models like the Phi-3-mini with 3.8 billion parameters, and the Phi-3-small and Phi-3-medium, each with 7 billion and 14 billion parameters, respectively 1. Notably, the Phi-3-mini supports up to a 128K token context window with minimal quality impact, a feature rare for models of its size 1. These models are instruction-tuned for straightforward usage and are optimized for various processing platforms, including GPUs, CPUs, and even mobile hardware 1. Despite their prowess, the Phi-3 models might perform slightly below larger models on factual knowledge tests due to their relatively smaller size 1.
Decision facts
- Best fit
- vision and multimodal workstructured outputscoding
- Capability starting point
- Phi-3 Small 128K with 128k context
- Lowest tracked input
- DeepInfra Phi 3 Mini 4K Instruct · $0.050/1M · DeepInfra
- Closest related family
- Agents-A1
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
Use when the workload needs 128k context and 3.8B parameters.
Use when the workload needs 128k context, 4.1B parameters, and multimodal inputs.
Use when the workload needs 4k context, 3.8B parameters, and structured outputs.
Use when the workload needs 128k context, 7B parameters, and structured outputs.
Use when the workload needs 128k context and 14B parameters.
Use when the workload needs 4k context, 14B parameters, and structured outputs.
Use when the workload needs 128k context and 7B parameters.
Use when the workload needs 8k context and 7B parameters.
Use when the workload needs 128k context, 4.2B parameters, and multimodal inputs.
Use when the workload needs 4k context and 14B parameters.
Use when the workload needs 4k context and 3.8B parameters.
Use when the workload needs 128k context and 3.8B parameters.
Use when the workload needs 4k context and 3.8B parameters.
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| Phi 3.5 Mini Instruct | Use when the workload needs 128k context and 3.8B parameters. | 2024-08 | 128k context3.8B parameters | Current |
| Phi 3.5 MoE Instruct | Use when the workload needs 128k context. | 2024-08 | 128k context | Current |
| Phi 3.5 Vision Instruct | Use when the workload needs 128k context, 4.1B parameters, and multimodal inputs. | 2024-08 | 128k context4.1B parametersmultimodal inputs | Current |
| Phi-3 Silica | Use when the workload needs 3.3B parameters. | 2024-06 | 3.3B parameters | Current |
| DeepInfra Phi 3 Mini 4K Instruct | Use when the workload needs 4k context, 3.8B parameters, and structured outputs. | 2024-05 | 4k context3.8B parametersstructured outputs | Current |
| DeepInfra Phi 3 Small 128K Instruct | Use when the workload needs 128k context, 7B parameters, and structured outputs. | 2024-05 | 128k context7B parametersstructured outputs | Current |
| Phi-3 Medium 128K | Use when the workload needs 128k context and 14B parameters. | 2024-05 | 128k context14B parameters | Current |
| Phi-3 Medium 4K | Use when the workload needs 4k context, 14B parameters, and structured outputs. | 2024-05 | 4k context14B parametersstructured outputs | Current |
| Phi-3 Small 128K | Use when the workload needs 128k context and 7B parameters. | 2024-05 | 128k context7B parameters | Current |
| Phi-3 Small 8K | Use when the workload needs 8k context and 7B parameters. | 2024-05 | 8k context7B parameters | Current |
| Phi-3 Vision | Use when the workload needs 128k context, 4.2B parameters, and multimodal inputs. | 2024-05 | 128k context4.2B parametersmultimodal inputs | Current |
| Phi-3 Medium | Use when the workload needs 4k context and 14B parameters. | 2024-04 | 4k context14B parameters | Current |
| Phi-3 Mini | Use when the workload needs 4k context and 3.8B parameters. | 2024-04 | 4k context3.8B parameters | Current |
| Phi-3 Mini 128K | Use when the workload needs 128k context and 3.8B parameters. | 2024-04 | 128k context3.8B parameters | Current |
| Phi-3 Mini 4k | Use when the workload needs 4k context and 3.8B parameters. | 2024-04 | 4k context3.8B parameters | Current |
Release Timeline
4 release groupsSpecifications(15 models)
| Model | Released | Context | Parameters | Vision | Multimodal | Structured Outputs |
|---|---|---|---|---|---|---|
| Phi 3.5 Mini Instruct | 2024-08 | 128k | 3.8B | No | No | No |
| Phi 3.5 MoE Instruct | 2024-08 | 128k | 16x3.8B (42B, 6.6B active) | No | No | No |
| Phi 3.5 Vision Instruct | 2024-08 | 128k | 4.1B | Yes | Yes | No |
| Phi-3 Silica | 2024-06 | — | 3.3B | No | No | No |
| DeepInfra Phi 3 Mini 4K Instruct | 2024-05 | 4k | 3.8B | No | No | Yes |
| DeepInfra Phi 3 Small 128K Instruct | 2024-05 | 128k | 7B | No | No | Yes |
| Phi-3 Medium 128K | 2024-05 | 128k | 14B | No | No | No |
| Phi-3 Medium 4K | 2024-05 | 4k | 14B | No | No | Yes |
| Phi-3 Small 128K | 2024-05 | 128k | 7B | No | No | No |
| Phi-3 Small 8K | 2024-05 | 8k | 7B | No | No | No |
| Phi-3 Vision | 2024-05 | 128k | 4.2B | Yes | No | No |
| Phi-3 Medium | 2024-04 | 4k | 14B | No | No | No |
| Phi-3 Mini | 2024-04 | 4k | 3.8B | No | No | No |
| Phi-3 Mini 128K | 2024-04 | 128k | 3.8B | No | No | No |
| Phi-3 Mini 4k | 2024-04 | 4k | 3.8B | No | No | No |
Available From(6 providers)
Pricing
| Model | Provider | Input / 1M | Output / 1M | Type |
|---|---|---|---|---|
| DeepInfra Phi 3 Mini 4K Instruct | DeepInfra | $0.05 | $0.15 | Serverless |
| Phi-3 Mini 128K | Replicate API | $0.05 | $0.25 | Serverless |
| Phi-3 Mini 4k | Replicate API | $0.05 | $0.25 | Serverless |
| Phi-3 Mini 128K | Fireworks AI | $0.1 | $0.1 | Provisioned |
| Phi-3 Medium 4K | DeepInfra | $0.14 | $0.41 | Serverless |
| Phi-3 Vision | Fireworks AI | $0.2 | $0.2 | Serverless |
| Phi-3 Mini 4k | Microsoft Foundry | $0.28 | $0.84 | Serverless |
| Phi-3 Vision | Microsoft Foundry | $0.28 | $0.84 | Provisioned |
| Phi-3 Mini 128K | Microsoft Foundry | $0.3 | $0.9 | Serverless |
| Phi-3 Small 8K | Microsoft Foundry | $0.32 | $0.96 | Serverless |
| Phi-3 Small 128K | Microsoft Foundry | $0.35 | $1.05 | Serverless |
| Phi-3 Medium 4K | Microsoft Foundry | $0.45 | $1.35 | Serverless |
| DeepInfra Phi 3 Small 128K Instruct | DeepInfra | $0.45 | $0.65 | Serverless |
| Phi-3 Medium 128K | Microsoft Foundry | $0.5 | $1.5 | Serverless |
| Phi 3.5 MoE Instruct | Fireworks AI | $0.5 | $0.5 | Serverless |
| Phi 3.5 Mini Instruct | Fireworks AI | $0.9 | $0.9 | Serverless |
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Related Model Families
Models(15)
Phi 3.5 Mini Instruct
Phi 3.5 MoE Instruct
Phi 3.5 Vision Instruct
Phi-3 Silica
DeepInfra Phi 3 Mini 4K Instruct
DeepInfra Phi 3 Small 128K Instruct
Phi-3 Medium 128K
Phi-3 Medium 4K
Phi-3 Small 128K
Phi-3 Small 8K
Phi-3 Vision
Phi-3 Medium
Phi-3 Mini
Phi-3 Mini 128K
Phi-3 Mini 4k