LLM Reference

Phi-1

Released
2023-06-01
Last refreshed
2026-05-19
Status
Researched 16d ago
Open Source

Phi-1 has model metadata, but missing tracked provider pricing keeps it from being a default production pick.

Use it for

  • Teams evaluating general LLM work
  • Workloads that can use a 2k context window

Do not use it for

  • Cost-sensitive launches that need sourced token pricing
  • Vision or document-understanding workloads
  • Strict JSON or tool-calling flows
Specifications
Family
Phi-1
Released
2023-06-01
Context
2k
Parameters
1.3B
Architecture
Decoder Only
Specialization
general
Training
finetuned
Created by

Advancing the state-of-the-art in AI and computing.

Redmond, Washington, United States
Founded 1991
Website
Pricing

No tracked provider token pricing is available yet.

About

Phi-1 is a compact, transformer-based large language model designed for basic Python coding, featuring 1.3 billion parameters. Despite its smaller size compared to many LLMs, Phi-1 maintains high accuracy, especially in Python code generation, demonstrating over 50% accuracy on simple coding tasks. It benefits from a unique architecture with rotary position embeddings, flash attention, and deep normalization. Trained on high-quality data, it focuses on structured and synthetically generated content, showcasing that data quality can trump quantity. However, while efficient and suitable for resource-limited environments, Phi-1 faces challenges with complex tasks and risks producing inaccurate or insecure code. Its output often requires careful review and testing.

Phi-1 is an open-source model. The structured metadata tracks a 2k-token context window. No headline benchmark score is tracked for Phi-1 yet.

Top use-case fit

No primary decision-task fit is mapped for this model yet.

Provider price ladder

No tracked provider token pricing is available for this model yet.

Capabilities

No model capability flags are currently sourced.

Benchmark peer barsfor Coding

No task-mapped benchmark peers are available for this model yet.

Migration checks

No linked migration route is available for this model yet.

Rankings & picks(7)