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Agent framework (Python)
The best agent framework for Python builders is LangGraph because it scores highest on our published formula (86.2/100): Graph-based orchestration for stateful, long-running agents. Widely adopted.
The job: “I'm building a multi-step agent in Python and want structure.” · Last checked
LangGraph
Graph-based orchestration for stateful, long-running agents. Widely adopted.
Not for: Simple single-call scripts where a framework is overkill.
Pricing: Open source library. source, checked 2026-10-19
Visit LangGraph ↗OpenAI Agents SDK
Lightweight, open-source agents SDK from OpenAI.
Not for: Teams that want complex graph orchestration out of the box.
Pricing: Open source library; model usage billed by your provider. source
Score breakdown
| Tool | Fit (editorial) ×0.4 | Adoption (GitHub stars) ×0.25 | Momentum (release freshness) ×0.2 | Attention (HN, 30d) ×0.15 | Score |
|---|---|---|---|---|---|
| LangGraph | 5/5 → 1 | 43.5k★ → 0.869 | Oct 19, 2026 → 0.996 | 7 pts → 0.306 | 86.2 |
| OpenAI Agents SDK | 4/5 → 0.75 | 30.1k★ → 0.839 | Oct 15, 2026 → 0.947 | 0 pts → 0 | 69.9 |
Missing signals are dropped and the remaining weights re-normalized. See methodology. Signals fetched Oct 19, 2026.
FAQ
What is the best agent framework for Python builders?
The best agent framework for Python builders is LangGraph because it scores highest on our published formula (86.2/100): Graph-based orchestration for stateful, long-running agents. Widely adopted.
What is the best alternative to LangGraph?
Our runner-up is OpenAI Agents SDK (69.9/100). Lightweight, open-source agents SDK from OpenAI. Not for: Teams that want complex graph orchestration out of the box.
Who should not use LangGraph?
Simple single-call scripts where a framework is overkill.
How much does LangGraph cost?
Open source library. (checked 2026-10-19, source: https://github.com/langchain-ai/langgraph)
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