Picking an Agent Framework in 2026: An Honest Verdict on Six of Them

Short summary

Six agent frameworks for 2026 compared: LangGraph prioritizes durability with checkpointing; OpenAI SDK offers speed on OpenAI infrastructure; Claude Agent SDK targets code/file work; Microsoft agent-framework consolidates AutoGen/Semantic Kernel for Azure enterprises; CrewAI uses team abstractions; Pydantic AI enforces type safety. Despite MCP tool convergence, framework choice remains sticky at the abstraction layer—select based on stack, production needs, and problem shape.

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