Question 1

What is AgentBudget?

Accepted Answer

AgentBudget is an open-source Python SDK that enforces real-time cost limits on AI agent sessions. With one line of code — agentbudget.init('$5.00') — you set a hard dollar cap on any agent using OpenAI, Anthropic, or Gemini. When the budget is hit, the agent stops automatically.

Question 2

How do I install AgentBudget?

Accepted Answer

Install AgentBudget via pip: pip install agentbudget. It requires Python 3.9+ and has no external dependencies.

Question 3

What AI models does AgentBudget support?

Accepted Answer

AgentBudget supports 60+ models including all OpenAI models (GPT-4o, GPT-4.1, o1, o3, o4-mini), all Anthropic Claude models (Opus, Sonnet, Haiku), Google Gemini (1.5, 2.0, 2.5), Mistral, and Cohere. Custom model pricing can be registered at runtime.

Question 4

How does AgentBudget stop runaway AI agents?

Accepted Answer

AgentBudget uses three layers of protection: a hard dollar limit that raises BudgetExhausted when reached, a soft limit callback at 90% to allow graceful shutdown, and a circuit breaker that detects repeated API calls in a loop and raises LoopDetected before the budget is drained.

Question 5

Does AgentBudget work with LangChain and CrewAI?

Accepted Answer

Yes. AgentBudget has native integrations for LangChain via LangChainBudgetCallback and CrewAI via CrewAIBudgetMiddleware. Install with pip install agentbudget[langchain].

AgentBudget Whitepaper