Track 4: Working With LLM APIs, Core API Skills

Tool Calling in Code

Let the model call your Python functions.

Status: Coming soon IntermediateVideo lessonAbout 14 min Needs a paid tool

Part of Get an AI Engineering Job (32 of 83) and Build AI Agents and Apps (19 of 88)

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Course

LLM APIs Masterclass: OpenAI, Claude, Gemini & Local Models

Udemy: coming soon

Tools

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Then try

In this module

  1. Messages, Roles and Multi-Turn Chat
  2. Streaming Responses and a ChatGPT-Style UI
  3. Tool Calling in Code
  4. Structured Output: JSON Schema, Pydantic, Invoice Extractor
  5. Measure and Cut Cost and Latency
  6. Prompt Caching
  7. Rate Limits, Fallbacks and Portable Code: LiteLLM, OpenRouter

The course this lesson belongs to