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API and builders’ tools (light)
Part 4 closes the ChatGPT product map: ChatGPT Plus or Pro is not free unlimited API. Open platform.openai.com only if you build software that calls models. Most AMS…
Claude Design and Claude Science (where they fit)
Claude Design handles visual work (decks, mockups, prototypes, brand systems, exports). Claude Science is a research workbench with tools, compute, and auditable artifacts, not peer review. Part 4…
Aggregations and groupby
Learn pandas groupby as split-apply-combine, the same idea as SQL GROUP BY. Build sum, mean, count, and multi-metric aggregations, with a clear sales-by-region before and after table example.
Models chooser in plain English
Part 3 of the ChatGPT product map: Instant, reasoning, Pro tiers, and Work or Codex models without FOMO. Start on the default, upgrade only when a clear prompt…
Claude Cowork: what it is for
Claude Cowork is the agent surface for non-coding knowledge work: folders and tools you choose, multi-step tasks, deliverables you still review. Part 3 of the Claude product map…
