Parallel Tool Calling

Master concurrent tool execution to build faster, more efficient AI agents

The Speed Problem

Imagine an AI agent needs to check the weather, fetch news, and get stock prices. Should it call these tools one-by-one (sequential) or all-at-once (parallel)? The difference can be 3x faster execution!

Why This Matters

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Sequential (Slow)

Call tool 1 → wait → call tool 2 → wait → call tool 3
3 seconds total

Parallel (Fast)

Call all 3 tools at once → wait for slowest
1 second total

Interactive: See the Difference

Watch how execution time differs between sequential and parallel modes

Weather API1000ms
News API1000ms
Stock API1000ms

When to Use Parallel Tool Calling

Tools are Independent
Each tool's input doesn't depend on another's output
I/O Bound Operations
API calls, database queries, file operations
Speed Matters
User experience depends on fast responses