> ## Documentation Index > Fetch the complete documentation index at: https://docs.ironlabs.ai/llms.txt > Use this file to discover all available pages before exploring further. # Live reasoning view > Watch the model think before it answers. When a reasoning model is running, Foundry shows a **Reasoning block** above the assistant's reply that streams the model's chain of thought in real time. Click the block to expand and watch. Collapse it once the reply lands — the trace stays attached for later review. **Screenshot coming.** Expanded reasoning block, mid-stream. ## What you'll see * **Brain header** with an animated spinner while thinking. * A monospace stream of the reasoning trace. * The final answer below, in normal chat formatting. If you collapse the block while it's streaming, Foundry keeps streaming in the background; expand again any time to see where it's at. ## Why it matters * **Debug bad answers** by reading what the model considered. * **Build trust** — when the model is confident, the trace tends to be linear; when it's uncertain, you'll see it backtrack. * **Learn faster** — the trace often surfaces angles you hadn't thought of. ## Tips * The trace can be long. **Collapse and skim** the answer first; expand the trace only when you want to dig in. * For repeated debugging, set [Reasoning Effort](/foundry/reasoning/effort-control) to **High** to get the most-detailed trace. ## Limits * The trace is **not the model's reasoning verbatim** in the philosophical sense — it's the model's externalized scratchpad. Useful, but not a brain scan. * Some providers redact parts of the trace; you'll see those as `[redacted]` markers. ## Related Pick how deep the trace goes. Concept overview.