Which is cheaper, ChatGPT or DeepSeek?
DeepSeek. It has a free tier; ChatGPT starts at $20/mo.
Head-to-head comparison
ChatGPT vs DeepSeek
DeepSeek is free. ChatGPT starts at $20/mo.
· 4 months ago
DeepSeek
LLMs
Free
Free chat · V4 API ~$0.30/$0.50 per M tokens (input/output)
Frontier-grade reasoning at 1/10th the cost
Quick answer
ChatGPT and DeepSeek are alternatives in the LLMs category. ChatGPT: OpenAI's general-purpose chat + GPT-4o. DeepSeek: Frontier-grade reasoning at 1/10th the cost. DeepSeek is free; ChatGPT starts at $20/mo.
Where each ships
ChatGPT-only stacks (1)
DeepSeek-only stacks (1)
ChatGPT vs DeepSeek FAQ
What is ChatGPT best for?
OpenAI's general-purpose chat + GPT-4o. It sits in the llms category, and ships in 1 tested stack here.
What is DeepSeek best for?
Frontier-grade reasoning at 1/10th the cost. It sits in the llms category, and ships in 1 tested stack here.
Can I use ChatGPT and DeepSeek together?
They are alternatives at the same step, so most stacks pick one or the other. No aistack.sh stack uses both today, though nothing prevents a custom workflow.
What are the alternatives to ChatGPT and DeepSeek?
Beyond each other, ChatGPT's closest alternatives are Claude, Gemini. DeepSeek's closest alternatives are Claude.
Also compared
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