Should you pick ChatGPT or Claude?
Both have a free plan, a $20 tier and $100 and $200 tiers for heavy use, so the split is what comes in the box. ChatGPT runs OpenAI's GPT-5.6 models, generates and edits images, adds an $8 Go plan below Plus, and bundles ChatGPT Work for multi-step tasks and Codex for code on every plan. Claude runs Anthropic's Sonnet, Opus and Haiku, outputs text only, puts voice, memory and Artifacts on its free plan, and adds Claude Code, Cowork and Claude in Chrome from Pro.
Which is cheaper, ChatGPT or Claude?
ChatGPT has the cheaper paid plan. Both are free to start, and ChatGPT sells Go at $8/mo below Plus at $20/mo, while Claude's first paid plan is Pro at $20/mo, or $17/mo billed annually. The heavy-use plans cost the same: ChatGPT Pro starts at $100/mo for 5x Plus limits with a $200/mo tier at 20x, and Claude Max costs $100/mo for 5x Pro usage or $200/mo for 20x. For teams, ChatGPT Business is $25 per user billed monthly or $20 billed annually for two or more users. Claude Team Standard is $25 per seat monthly or $20 annually, and Team Premium, with 5x the Standard usage, is $125 or $100. ChatGPT Enterprise and Edu go through sales; Claude Enterprise is $20 per seat plus usage at API rates.
Which models do ChatGPT and Claude use?
ChatGPT runs OpenAI's GPT-5.6 family: Sol for the hardest work, Terra for everyday tasks and Luna for fast, high-volume work. Luna is the default ChatGPT model on Free and Go, Plus and Pro users can set how much thought Sol puts into a reply, and GPT-6 Astra, OpenAI's most capable model, shows up in the model selector as it rolls out to accounts. Claude's Free plan includes Sonnet and Haiku, and Pro adds Opus. Fable 5.1 is not on Free: Pro and Team standard seats pay for it with usage credits, and Max and Team premium seats can spend up to half their weekly limit on it. On Anthropic's API, Fable 5.1, Opus 5 and Sonnet 5 each have a 1M-token context window.
How do ChatGPT and Claude usage limits work?
Both count in five-hour windows. OpenAI estimates ChatGPT Work and Codex usage as messages per five-hour period, shared between the two, and weekly limits may also apply; the count depends on the model, the size of the task and whether it runs locally or in the cloud. ChatGPT Voice in the desktop app has its own five-hour allowance, about 30 minutes to an hour on Plus and unlimited on the $200 Pro tier. Plus and Pro users who hit a limit can buy credits. Claude Pro and Max have a session limit that resets every five hours plus a weekly limit across all models, and the same budget covers chat messages and Claude Code. Pro gives at least five times the Free plan's usage per session at peak hours, and usage credits let you keep working past the cap.
Can ChatGPT and Claude generate images?
ChatGPT can. It generates images and edits ones you attach, and it can also build interactive visualizations in Chat and ChatGPT Work. Claude cannot generate images: every current Claude model accepts text and images as input but returns only text. Claude still reads screenshots, charts and photos, and its plans list generating code and visualizing data, so it can chart data with code, but it will not produce a picture the way ChatGPT does.
What is ChatGPT best for?
OpenAI's assistant for chat, multi-step work and coding. It sits in the llms category, and ships in 1 tested stack here.
What is Claude best for?
Frontier LLM with the best long-form writing voice. It sits in the llms category, and ships in 34 tested stacks here.
Can I use ChatGPT and Claude together?
Yes. 1 aistack.sh stack uses both: Indie SaaS.
What are the alternatives to ChatGPT and Claude?
Beyond each other, ChatGPT's closest alternatives are Gemini, Perplexity. Claude's closest alternatives are Gemini.