---
title: "Control Reasoning History"
description: "Use Preserve Thinking to choose whether a supported GGUF model receives its earlier reasoning in later conversation turns."
version: "Noema 4.1+"
platforms: ["iPhone", "iPad", "Mac", "Vision Pro"]
reviewed: "October 3, 2026"
canonical: "https://noemaai.com/docs/reasoning-history"
---

# Control Reasoning History

Decide, per model, whether earlier reasoning stays in context for follow-up turns.

**Preserve Thinking** controls whether a supported GGUF model receives its earlier reasoning as part of the context for later turns.

This preference is saved separately for each model.

## Change the setting

1. Open the model’s settings from **Stored**.
2. Find **Preserve Thinking** in the model’s behavior settings.
3. Turn it on or off.
4. Choose **Save** to keep the preference, or **Load** to apply the settings while loading the model.

## What the setting changes

With **Preserve Thinking** enabled, a compatible model can receive reasoning from earlier assistant turns. This may help with follow-up questions that depend on an earlier derivation or plan.

Keeping that material also uses more of the context window and can increase prompt-processing work. The effect depends on the model and its chat template; it does not guarantee better answers.

With the setting disabled, compatible templates omit earlier reasoning from later prompts. This does not delete the conversation.

## Reasoning versus Preserve Thinking

| Control | Purpose |
| --- | --- |
| **Reasoning** | Controls whether a supported model reasons before answering the current request. |
| **Preserve Thinking** | Controls whether earlier reasoning is retained in subsequent conversation context. |

Changing one control does not automatically change the other.

## Compatibility

Reasoning-history behavior is available for supported GGUF models whose chat templates honor it. Other model formats and unsupported templates may not provide the same behavior.

## Related documentation
- [Model Settings](https://noemaai.com/docs/model-settings)
- [Running Models Locally](https://noemaai.com/docs/running-llms)
- [Chat Interface](https://noemaai.com/docs/chat-interface)