Question 1

Is Deep AI Circle free to use?

Accepted Answer

Yes. The AI chat is free with no signup — 5 messages per day. The prompt engineering tool's offline mode is also free and unlimited. A $9.99/month subscription unlocks unlimited AI chat, all expert AI skills, AI mode for the prompt engineer, and 40+ curated courses.

Question 2

What are Claude Code skills?

Accepted Answer

Claude Code skills are .skill.md files you drop into your project folder. Reference them with @skillname.skill.md in your CLAUDE.md and Claude Code reads them as expert instruction sets — giving it specialist knowledge in coding, marketing, data analysis, security, and more.

Question 3

What AI models does Deep AI Circle support?

Accepted Answer

Deep AI Circle's free chat works with any browser. Skills come in two formats: Claude Code format (for Anthropic's Claude Code CLI) and Universal format (system prompts that work in Claude.ai, ChatGPT, Gemini, Grok, and any AI chat interface). The prompt engineer supports Claude, GPT-4o, Gemini, Grok, Llama, and Mistral.

Question 4

What AI courses does Deep AI Circle offer?

Accepted Answer

Deep AI Circle curates 40+ free AI courses from Anthropic, Google, Stanford, fast.ai, DeepLearning.AI, and Hugging Face. Courses are organized by level: complete beginner, beginner, intermediate, and advanced practitioner. All courses are free and link directly to the original provider.

Question 5

How does the prompt engineering tool work?

Accepted Answer

Type what you want AI to do. The tool automatically selects the best framework from 8 professional options — CO-STAR, RISEN, Chain of Thought, Few-Shot, RASCEF, Expert Persona, TAG, and CRISPE — and transforms your rough idea into an optimized prompt. Offline mode is free. AI mode (subscribers) uses real AI to rewrite your prompt specifically for Claude, GPT-4o, Gemini, Grok, or Llama.