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Interactive 3D/Agent Loop: Observe-Think-Act
Scenario
Web Search Task
Cycle 0 of 3 · Step 0 of 9
👁
OBSERVE
🧠
THINK
⚡
ACT
Press "Next Step" or "Run 5 Steps" to begin the agent loop.
Scenario
Total steps9
Completed0
Cycles done0
Observe-Think-Act is the core agent loop. The agent perceives its environment, reasons about next actions, executes them, then loops back - until the task is complete.

Agent Loop: Observe-Think-Act - Interactive Visualization

The observe-think-act loop is the fundamental execution cycle of every AI agent. The agent observes its environment (tool results, user messages, API responses), thinks by running the LLM to plan the next action, then acts by executing a tool call or sending a response. This cycle repeats until the task is complete. Understanding this loop is prerequisite to building any agentic system.

  • Three real scenarios: web search task, code debugging, and form filling - each with full trace logs
  • Step through each observe-think-act cycle manually or use auto-play at 1.4s per step
  • Animated cycle diagram highlights the active stage with visual glow effect
  • Trace log accumulates every step so you can review the full agent execution history

Part of the EngineersOfAI Interactive 3D - free interactive visualizations covering every major concept in machine learning and AI engineering. Hover any element for a plain-English explanation. No code required.