Switch to DuckDuckGoSearchResults to expose URLs for read_webpage

Add read_webpage tool for reliable page content extraction

Improve answer quality: cleanup + stricter format prompt

Upgrade to gpt-4o, remove useless fetch_task_file tool

Fix: parallel_tool_calls=False, force final answer, improve prompt

Switch from Groq to OpenAI gpt-4o-mini

Fix: remove Wikipedia (broken tool calls), cap iterations, fix file parsing

Fix: replace agent factory with manual llm.bind_tools() ReAct loop

Fix: use create_openai_tools_agent instead of create_tool_calling_agent

Fix: switch to create_tool_calling_agent + AgentExecutor

Fix: update Groq model to llama-3.3-70b-versatile

Fix: pass system prompt via SystemMessage instead of state_modifier

Add LangGraph + Groq ReAct agent for GAIA benchmark

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