AI agent frameworks tools, tiered
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6 tools we track in this category, with a short reason and current starting price for each. Tiers are opinions; see how we rank.
The tiers
S
Claude Agent SDK · Free (API costs)
The harness behind Claude Code, as an SDK.
The harness behind Claude Code, as an SDK.
A
OpenAI Agents SDK · Free (API costs)
Lightweight agents, handoffs, guardrails and tracing.
Lightweight agents, handoffs, guardrails and tracing.
LangGraph · OSS / LangSmith $39 seat
Stateful graph-based agent orchestration.
Stateful graph-based agent orchestration.
Vercel AI SDK · Free
TypeScript toolkit for streaming, tools and agents.
TypeScript toolkit for streaming, tools and agents.
C
CrewAI · OSS / free + enterprise
Role-based multi-agent crews; fast to prototype, less control than graph or SDK options.
Role-based multi-agent crews; fast to prototype, less control than graph or SDK options.
D
AutoGen · Free
In maintenance mode; Microsoft points new projects to Agent Framework.
In maintenance mode; Microsoft points new projects to Agent Framework.
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