Is Claude better than ChatGPT for financial planning?
It depends on the kind of planning work. Both are capable, they are good at different things, and better only means something once you name the task.
Claude edge is careful reasoning over long, dense inputs: read a pile of budgets, board decks, or filings and reason across them in one pass, in a style that hedges instead of guessing. For analysis that hangs on getting a long document right, many people prefer it.
ChatGPT edge is breadth and tooling: the widest range of capabilities and the most mature custom-assistant ecosystem, so you can build a reusable assistant for a recurring planning workflow and hand it to the team.
For a finance team a fair rule of thumb is Claude when the task is reading and reasoning over a lot of material, ChatGPT when you want range or a reusable custom assistant. Neither replaces a real planning model, and running both with clear lanes is common and sensible.