$0
Cost (available on free tier)
0+
Languages supported
0
Daily usage cap (M365 subscribers get priority)
What does "advanced reasoning" actually mean?
Normal AI chat answers your question immediately, like a conversation. Advanced reasoning (Think Deeper) makes the AI pause and work through the problem step by step before answering, similar to how you might write out the steps of a math problem on paper. The result is more accurate, more thorough answers for complex questions, at the cost of taking a bit longer.
Copilot Think Deeper
Price
Free (M365 subscribers get priority)
Usage limits
Available to all, priority for subscribers
Underlying model
Latest OpenAI reasoning models
Best for
Free advanced reasoning
ChatGPT o1/o3
Price
Plus ($20/mo) or Pro ($100+/mo)
Usage limits
Limited on Plus, higher on Pro
Underlying model
o1, o3, o4-mini
Best for
Heaviest reasoning tasks
Gemini Deep Think
Price
Ultra (from $99.99/mo)
Usage limits
Limited queries
Underlying model
Gemini 3.1 Pro
Best for
Google ecosystem
When to use Think Deeper
Use Think Deeper for math homework, coding problems, research questions with multiple parts, strategic business decisions, or any question where you need a carefully reasoned answer. For quick factual questions or casual conversation, regular chat mode is faster and perfectly sufficient.