diff --git a/get-shit-done/bin/gsd-tools.js b/get-shit-done/bin/gsd-tools.js
index 688c39936..a7be1efbc 100755
--- a/get-shit-done/bin/gsd-tools.js
+++ b/get-shit-done/bin/gsd-tools.js
@@ -1347,7 +1347,8 @@ function cmdResolveModel(cwd, agentType, raw) {
     return;
   }
 
-  const model = agentModels[profile] || agentModels['balanced'] || 'sonnet';
+  const resolved = agentModels[profile] || agentModels['balanced'] || 'sonnet';
+  const model = resolved === 'opus' ? 'inherit' : resolved;
   const result = { model, profile };
   output(result, raw, model);
 }
@@ -3509,7 +3510,8 @@ function resolveModelInternal(cwd, agentType) {
   const profile = config.model_profile || 'balanced';
   const agentModels = MODEL_PROFILES[agentType];
   if (!agentModels) return 'sonnet';
-  return agentModels[profile] || agentModels['balanced'] || 'sonnet';
+  const resolved = agentModels[profile] || agentModels['balanced'] || 'sonnet';
+  return resolved === 'opus' ? 'inherit' : resolved;
 }
 
 function findPhaseInternal(cwd, phase) {
diff --git a/get-shit-done/references/model-profile-resolution.md b/get-shit-done/references/model-profile-resolution.md
index 6b7481b41..4e41aab9e 100644
--- a/get-shit-done/references/model-profile-resolution.md
+++ b/get-shit-done/references/model-profile-resolution.md
@@ -20,13 +20,15 @@ Look up the agent in the table for the resolved profile. Pass the model paramete
 Task(
   prompt="...",
   subagent_type="gsd-planner",
-  model="{resolved_model}"  # e.g., "opus" for quality profile
+  model="{resolved_model}"  # "inherit", "sonnet", or "haiku"
 )
 ```
 
+**Note:** Opus-tier agents resolve to `"inherit"` (not `"opus"`). This causes the agent to use the parent session's model, avoiding conflicts with organization policies that may block specific opus versions.
+
 ## Usage
 
 1. Resolve once at orchestration start
 2. Store the profile value
 3. Look up each agent's model from the table when spawning
-4. Pass model parameter to each Task call
+4. Pass model parameter to each Task call (values: `"inherit"`, `"sonnet"`, `"haiku"`)
diff --git a/get-shit-done/references/model-profiles.md b/get-shit-done/references/model-profiles.md
index 870db8dd2..3efd46713 100644
--- a/get-shit-done/references/model-profiles.md
+++ b/get-shit-done/references/model-profiles.md
@@ -71,3 +71,6 @@ Verification requires goal-backward reasoning - checking if code *delivers* what
 
 **Why Haiku for gsd-codebase-mapper?**
 Read-only exploration and pattern extraction. No reasoning required, just structured output from file contents.
+
+**Why `inherit` instead of passing `opus` directly?**
+Claude Code's `"opus"` alias maps to a specific model version. Organizations may block older opus versions while allowing newer ones. GSD returns `"inherit"` for opus-tier agents, causing them to use whatever opus version the user has configured in their session. This avoids version conflicts and silent fallbacks to Sonnet.