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LLM & Agentic
01

LLM Lifecycle — From Data to Deployment

The end-to-end lifecycle of a modern large language model. Every Staff FDE should understand what happens inside the black box — it informs every decision about quality, safety, cost, and latency.

The Five Phases

THE FIVE PHASES OF LLM DEVELOPMENT
PHASE 1
DATA
Crawl web
Filter (quality, safety, dedup)
→
PHASE 2
PRETRAIN
Predict next token
on trillions of tokens

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