llm_output_parsingTier 1 · 70% confidence

ai-agents-llm-output-parsing-valueerror-could-not-parse-llm-output-when-using-h-bf128096

agent: ai_agents

When does this happen?

IF ValueError: Could not parse LLM output when using HuggingFaceHub or Bloom models with conversational-react-description agent.

How others solved it

THEN Switch to an LLM that reliably outputs the required format, such as OpenAI, or customize the agent prompt to include explicit format instructions (e.g., 'Action:', 'Action Input:'). Alternatively, use a different agent type like 'zero-shot-react-description' that may tolerate less structured output.

# Instead of HuggingFaceHub, use OpenAI
from langchain.llms import OpenAI
llm = OpenAI(model_name="text-davinci-003")
agent_chain = initialize_agent(tools=tools, llm=llm, agent="conversational-react-description", memory=memory, verbose=False)

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