The three questions Mapi asked back-to-back
Mapi, who runs a nonprofit consulting practice with one VA in Colombia, asked me three questions back-to-back when she saw the setup. "Esto que me mostras vive en ChatGPT. Es facil despues hacer la transicion. Cuanto te tomo la transicion."
She had six custom GPTs that had stopped working well. "Llegaba a conversaciones muy largas y empiezan a inventarse cosas." Frangela, a solopreneur psychologist, made the move a month before our first call.
The pattern is universal in 2026: ChatGPT users are looking at Claude, and the migration question is the entry point.
What actually changes when you move
ChatGPT custom GPTs are isolated. Each one has its own instructions, its own files, and no awareness of the others.
Claude Cowork uses three primitives that solve that. Skills are reusable instruction sets that can be invoked from any conversation. CLAUDE.md is a single operating file that holds your business context, your voice, your rules, and is read by Claude every time you start a new session. Cowork projects are persistent workspaces with their own files and memory, and they can pull from shared Skills. See how the AI Operating System works for the architecture in detail.
The one-week migration
The migration takes about a week if you have an existing GPT setup.
Day one and two: I read your existing prompts and identify which ones become Skills versus which ones become entries inside CLAUDE.md. Day three and four: I install Drive sync, set up the Cowork projects, install the Skills, and write the first version of your operating file. Day five: 90-minute hands-on workshop with the team where each person ships one Skill tied to a real task.
Mapi's nonprofit migration in one week ran 2 hours 47 minutes in the workshop because we troubleshot Drive sync on her VA's Windows machine. She walked out with six Skills installed and the operating file connected. That is the workshop-first adoption method in practice.
Per-seat cost
Per-seat cost is the question Mapi asked next. "Si me toca lo mismo para Ivon y para Cata."
For a team of two-to-five, Claude Team at roughly $30 per user per month is the right plan. For a single power user moving from a $20-per-month ChatGPT seat, the Pro plan covers it. The bigger cost is the time to set it up well, which is why most teams hire someone to do the migration once instead of figuring it out over six months. See what a Claude Cowork training engagement costs for the engagement tiers, and the privacy posture on Team and Enterprise plans for regulated firms.
Who this is for
If you are running multiple GPTs that have stopped working as well as they used to, the migration solves that. Send me the list of GPTs you actually use weekly and I will tell you what becomes a Skill and what becomes an entry in CLAUDE.md.