Instructor: Structured Outputs for LLMs by 567-labs
structured outputs for llms
About Instructor: Structured Outputs for LLMs
From the project's README at github.com/567-labs/instructor. Lightly cleaned for readability; for the full source see the upstream repo.
Get reliable JSON from any LLM. Built on Pydantic for validation, type safety, and IDE support.
That's it. No JSON parsing, no error handling, no retries. Just define a model and get structured data.
[](https://pypi.org/project/instructor/) [](https://pypi.org/project/instructor/) [](https://github.com/567-labs/instructor) [](https://discord.gg/bD9YE9JArw) [](https://twitter.com/jxnlco)
> Use Instructor for fast extraction, reach for PydanticAI when you need agents. Instructor keeps schema-first flows simple and cheap. If your app needs richer agent runs, built-in observability, or shareable traces, try PydanticAI. Pyd
Health score breakdown
6-dimension composite. See methodology for formula and weights.
Adoption signals
Real-world usage data, pulled from each registry. The bigger the numbers, the more battle-tested the project.
| Signal | Value | Source |
|---|---|---|
| GitHub stars | 13k | github.com/567-labs/instructor |
| GitHub forks | 1.0k | github.com/567-labs/instructor |
Release & maintenance
Is this project actively maintained, or about to die? Check the recency of last commit and last release.
| Project age | 2.9 years | since Jun 2023 |
| Last commit | 14 days ago | Apr 22, 2026 |
| Releases shipped | 108 | last: 1 months ago |
| Funding links | 1 | declared by maintainers |
Self-hosting cost across providers
Detected requirements: 4GB RAM, 40GB disk minimum. Cheapest plan per provider that meets the requirement.
| Provider | Plan | Specs | Monthly | |
|---|---|---|---|---|
| hetzner | CAX11 | 2c · 4GB · 40GB | $4.13 USD | Deploy → |
| vultr | VC2 | 1c · 1GB · 25GB | $5 USD | Deploy → |
| linode | Nanode 1GB | 1c · 1GB · 25GB | $5.12 USD | Deploy → |
| digitalocean | Basic Regular 1GB | 1c · 1GB · 25GB | $6 USD | Deploy → |
What people say on Hacker News
- Instructor – Structured Outputs for LLMs
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- Show HN: Write in your unique voice, with AI critique
- Claude eagerly offers instructions to make explosives used in terrorist attacks
Ready to self-host Instructor: Structured Outputs for LLMs?
Spin up a hetzner CAX11 (4GB RAM, 40GB disk) for $4.13/mo and follow the project's official install docs.
Data last refreshed May 7, 2026.
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