Web · LLM / chat

ChatGPT

OpenAI’s mainstream chat + tools product for writing, code, and analysis.

Best for: General writing, code, brainstorming

Pricing: Free tier + Plus/Team

Official site All tools

Strengths

Fast multimodal chat
Strong general reasoning
Custom GPTs / projects
Wide plugin/tool ecosystem

Watch-outs

Subscription cost for best models
Data residency depends on plan
Can hallucinate specifics

Appears in these stacks

Coding & firmware · supporting — Quick snippets and error decoding.
Image generation & mockups · supporting — Quick concepts when already in a chat plan.
CAD / 3D design assist · supporting — Quick OpenSCAD syntax help.
Writing & technical docs · alternative — Fast drafts and outlines.
Stock & market research (not advice) · supporting — Explain a concept or ratio — not trade signals.
Classroom / teaching · primary — Lesson outlines and practice prompts (policy permitting).
Data analysis & BOMs · supporting — Formula help and pivot explanations.
Marketing graphics & thumbnails · supporting — Copy for captions next to the graphic.
Email & newsletter ops · alternative — Subject line variants and short blurbs.
Code security triage · supporting — Quick pattern explanations.
Meeting notes & action items · alternative — Fast bullet summaries.
Translation & localization · alternative — Short UI strings and variants.
Customer support knowledge base · alternative — Rewrite for tone after you paste policy text.
Radio / mesh field kits · supporting — Draft packing lists and channel naming schemes.
Lab notes → blog post · alternative — Fast outline from bullet chaos.
SEO content briefs · alternative — Keyword clusters and outline variants.
Product photography for shops · supporting — Listing titles/descriptions from real product facts.
Presentations & workshop slides · alternative — Slide bullet drafts.
Resume / portfolio for makers · alternative — Multiple tone variants.
Sales outreach (makers & shops) · alternative — Subject lines and follow-ups.
Grant & STEM proposal drafts · alternative — Section drafts from your outline.
Hardware log triage · supporting — Quick decode of common faults.
Accessibility alt text & captions · alternative — Alt text variants.
Inventory & spare-parts ops · supporting — Help with sheet formulas.
Open-source maintainer triage · alternative — Summarize long issue threads.
Interview prep (technical) · alternative — Drill questions by topic.
Agentic research assistants · supporting — General agentic chat features when available on your plan.
Prompt library ops · supporting — Generate variants for A/B notes.
Firmware release notes & changelog · alternative — Changelog formatting.