Think mode
Think mode lets Le Chat reason through complex problems.
Powered by our Magistral models, it breaks your question into smaller steps, works through each one, and gives you a clear answer along with the full reasoning path.
note
This approach is known as chain-of-thought prompting: the model reasons explicitly before answering. For the research behind it, see the original paper.
How to use
How to use
- Select the
Thinkmode at the right of the chat window (Fastis the default). - Enter your prompt and send it as usual.
- Le Chat begins reasoning and displays its thought process in real time.
- Once complete, Le Chat provides the final answer.
Think mode stays active until you switch to another mode. You can toggle it at any point in an existing chat.
When to use Think mode
When to use Think mode
Think mode is ideal for tasks requiring multi-step logic or structured analysis:
- Planning and strategy: break down a product launch, prioritize a roadmap, or evaluate hiring plans.
- Debugging production issues: trace through error chains, compare possible root causes, and narrow down fixes.
- Multi-factor decisions: weigh options with competing constraints, such as vendor selection or architecture trade-offs.
- Math and quantitative reasoning: work through financial models, statistical calculations, or proofs.
- Complex code review: reason about logic flows, edge cases, and potential regressions across a codebase.
tip
Not every question benefits from step-by-step reasoning. For simple factual lookups, quick text generation, or straightforward tasks, standard chat is faster and equally accurate.
Tips for better results
Tips for better results
- Be specific in your prompt. The more context you give, the better the reasoning. Instead of "What pricing model should we use?", try "Compare freemium vs. usage-based pricing for a B2B SaaS product, considering churn and expansion revenue."
- Use the reasoning as documentation. The chain-of-thought output makes a useful artifact for team discussions. Copy it into a Canvas or share the conversation to give colleagues visibility into how a decision was reached.
- Combine with other tools. Think mode works alongside web search, file uploads, and Libraries for reasoning based on your own data.
- Deep Research: for questions that need multi-source web research and a structured report.
- Canvas: refine and iterate on outputs from Think mode in an editor.
- Code Interpreter: run code and validate quantitative reasoning.