diff --git a/get-shit-done/references/model-profiles.md b/get-shit-done/references/model-profiles.md
index e4d5f0649..97a92b75d 100644
--- a/get-shit-done/references/model-profiles.md
+++ b/get-shit-done/references/model-profiles.md
@@ -40,8 +40,26 @@ Model profiles control which Claude model each GSD agent uses. This allows balan
 **inherit** - Follow the current session model
 - All agents resolve to `inherit`
 - Best when you switch models interactively (for example OpenCode `/model`)
+- **Required when using non-Anthropic providers** (OpenRouter, local models, etc.) — otherwise GSD may call Anthropic models directly, incurring unexpected costs
 - Use when: you want GSD to follow your currently selected runtime model
 
+## Using Non-Anthropic Models (OpenRouter, Local, etc.)
+
+If you're using Claude Code with OpenRouter, a local model, or any non-Anthropic provider, set the `inherit` profile to prevent GSD from calling Anthropic models for subagents:
+
+```bash
+# Via settings command
+/gsd:settings
+# → Select "Inherit" for model profile
+
+# Or manually in .planning/config.json
+{
+  "model_profile": "inherit"
+}
+```
+
+Without `inherit`, GSD's default `balanced` profile spawns specific Anthropic models (`opus`, `sonnet`, `haiku`) for each agent type, which can result in additional API costs through your non-Anthropic provider.
+
 ## Resolution Logic
 
 Orchestrators resolve model before spawning:
diff --git a/get-shit-done/workflows/settings.md b/get-shit-done/workflows/settings.md
index 7fc344559..b540cff61 100644
--- a/get-shit-done/workflows/settings.md
+++ b/get-shit-done/workflows/settings.md
@@ -49,7 +49,7 @@ AskUserQuestion([
       { label: "Quality", description: "Opus everywhere except verification (highest cost)" },
       { label: "Balanced (Recommended)", description: "Opus for planning, Sonnet for research/execution/verification" },
       { label: "Budget", description: "Sonnet for writing, Haiku for research/verification (lowest cost)" },
-      { label: "Inherit", description: "Use current session model for all agents (best for OpenCode /model)" }
+      { label: "Inherit", description: "Use current session model for all agents (best for OpenRouter, local models, or runtime model switching)" }
     ]
   },
   {