Model and reasoning overrides

Untether lets you override which model the agent uses and its reasoning level, per chat or per engine — all from Telegram, without editing config files or restarting.

Check current model#

Send /model to see what model is active and where the setting comes from:

/model

Untether Model: claude-opus-4-6 Source: global default

Set a model override#

Use /model set to override the model for the current engine:

/model set sonnet

To target a specific engine, include the engine name:

/model set claude opus

The override applies to the current chat (or topic, if you’re in a forum thread).

OpenCode: use provider/model format OpenCode requires the provider/model format for model overrides (e.g. openai/gpt-4o, anthropic/claude-sonnet-4-5). Using just the model name will fail. Example: /model set opencode openai/gpt-4o.

Clear model override#

Remove the override to revert to the default:

/model clear

To clear the override for a specific engine:

/model clear claude

Set reasoning level#

Some engines support reasoning levels that control how much thinking the model does before responding. Use /reasoning set:

/reasoning set high

Valid levels depend on the engine:

• Claude Code: low, medium, high, xhigh, max (passed as --effort)
• Codex CLI: minimal, low, medium, high, xhigh

Other engines (OpenCode, Pi, Gemini, Amp) ignore this setting.

Per-engine reasoning#

Target a specific engine with the engine name:

/reasoning set claude high

Clear reasoning#

Remove the reasoning override:

/reasoning clear

Or for a specific engine:

/reasoning clear claude

View full resolution#

Use /agent to see how all configuration layers resolve for the current scope:

/agent

The resolution order is (highest priority first):

1. Topic override — set via /model set in a forum topic
2. Chat default — set via /model set in a private or group chat
3. Project default — configured in projects.<alias>.default_model
4. Global default — configured at the top level of your config

Quick check /agent shows the effective engine, model, and reasoning for the current context, including which layer each setting comes from.

Admin-only in groups#

In group chats, model and reasoning changes require admin or creator status. This prevents non-admin members from switching to expensive models or changing settings that affect everyone in the group.

Related#

• Switch engines — change which engine handles messages
• Commands & directives — full command reference
• Configuration — config reference for model and reasoning settings