Alternatives to Instructor Php

Marvin is an open-source Python framework that turns LLM calls into typed functions, agents, and Pydantic-validated results.

BAML is a type-safe, Turing-complete language for agentic and LLM code that compiles typed Python and TypeScript SDKs.

Local MCP context gateway that compresses and filters what your AI coding agent reads

Tiptap AI Toolkit lets AI agents edit rich-text documents in place with schema-aware, reviewable patches.

Open-source TypeScript SDK for streaming AI apps and agents across 100+ models, with built-in provider fallbacks

Eino is an open-source Go LLM framework from ByteDance for building agents, graphs, and RAG pipelines in your existing Go backend.

Open-source JS/TS toolkit for building multimodal LLM agents with streaming, validation, and managed memory

Rig is an open-source Rust LLM framework for shipping type-safe AI agents across 20+ providers.

Open-source Rust library for building streaming, parallel LLM pipelines — data indexing, retrieval-augmented generation, and autonomous agents.

Open-source framework for adding agent chat, generative UI, and human approvals to React apps on any agent backend.

Open-source Python library that constrains LLM output with regex, context-free grammars, and inline control flow.

Outlines is a Python library for structured generation that constrains LLM decoding so JSON, regex, and grammar outputs are valid every

OpenUI turns AI agent responses into streaming generative UI built from your own component library.

Unified C# .NET library for calling 15+ LLM providers through a single strongly-typed API.

Genkit is Google's open-source AI SDK for building agentic AI apps in TypeScript, Go, Python, and Dart.

RubyLLM is the Ruby-native AI framework for chat, agents, tools, and RAG across 19 providers with one API.

Mellea turns type-annotated Python functions into validated, testable LLM calls with token-level constrained decoding.

TOON is an open-source, token-efficient encoding of the JSON data model for LLM prompts, using 42.6% fewer tokens than JSON.

Open-source LLM from UC Berkeley that turns natural language into API calls and tool-using agent actions.

SwiftOpenAI: an MIT-licensed Swift package for calling the OpenAI API with native async/await and Combine on Apple platforms.

Pydantic AI is the typed, open-source Python agent framework that returns Pydantic-validated objects from every run.

Mirascope is an open-source Python library that turns LLM calls, tools, and prompt versioning into plain decorated functions.

Build production AI agents with open source Python and TypeScript harness SDKs you fully control

Open-source React toolkit for generative UI that renders your own components from natural language

Prompt engineering IDE to compose, test, and score prompts across 150+ LLMs and 15 providers.

Free browser markdown editor with Battle Mode for comparing OpenAI, Claude, and Gemini prompt outputs, client-side only.

flompt is a free visual prompt builder that compiles prompts into Claude-optimized XML blocks

Open Strawberry is a free, open-source chain-of-thought inspector for reading and comparing model reasoning traces.

Free OpenAI API examples and Python notebooks for building chat, embeddings, and RAG apps

Open-source Java library that puts a unified LLM and vector store API inside your JVM app