DSPy review 2026: Stanford NLP framework for programming LLMs with automatic prompt and weight optimization — features, optimizer list, pros, cons.
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AI Frameworks
Guidance review 2026: token-level constrained LLM generation with grammars, regex, and JSON schema — MIT open source — features, pros, cons, use cases.
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Guidance is an open-source library on GitHub, so the software is free. Real cost comes from developer time, model/API usage, hosting, evals, and maintenance.Most popular Python library for getting structured, validated outputs from LLMs by combining pydantic schemas with provider-native function calling.
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Open SourceAn open-source Rust framework for building high-performance LLM applications and AI agents - the systems-language answer to LangChain and LlamaIndex.
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free