diff --git a/public/modelConstants.js b/public/modelConstants.js
index f05575c4..3fda71bc 100644
--- a/public/modelConstants.js
+++ b/public/modelConstants.js
@@ -14,6 +14,12 @@ export const CLAUDE_MODELS = {
       description:
         "Use the default model (currently Opus 4.8 (1M context)) · $5/$25 per Mtok",
     },
+    {
+      value: "fable",
+      label: "Fable",
+      description:
+        "Fable 5 · Most capable for your hardest and longest-running tasks · Uses your limits ~2× faster than Opus",
+    },
     {
       value: "sonnet",
       label: "Sonnet",
diff --git a/server/claude-sdk.js b/server/claude-sdk.js
index e59e503d..597e5f47 100644
--- a/server/claude-sdk.js
+++ b/server/claude-sdk.js
@@ -204,7 +204,7 @@ function mapCliOptionsToSDK(options = {}) {
   sdkOptions.disallowedTools = settings.disallowedTools || [];
 
   // Map model (default to sonnet)
-  // Valid models: sonnet, opus, haiku, opusplan, sonnet[1m]
+  // Valid models: sonnet, opus, haiku, opusplan, sonnet[1m], fable
   sdkOptions.model = options.model || CLAUDE_FALLBACK_MODELS.DEFAULT;
   // Model logged at query start below
 
diff --git a/server/modules/providers/list/claude/claude-models.provider.ts b/server/modules/providers/list/claude/claude-models.provider.ts
index b1b6ba02..f6c4c0c6 100644
--- a/server/modules/providers/list/claude/claude-models.provider.ts
+++ b/server/modules/providers/list/claude/claude-models.provider.ts
@@ -20,6 +20,11 @@ export const CLAUDE_FALLBACK_MODELS: ProviderModelsDefinition = {
       label: 'Default (recommended)',
       description: 'Use the default model (currently Opus 4.8 (1M context)) · $5/$25 per Mtok',
     },
+    {
+      value: 'fable',
+      label: 'Fable',
+      description: 'Fable 5 · Most capable for your hardest and longest-running tasks · Uses your limits ~2× faster than Opus',
+    },
     {
       value: "sonnet",
       label: "Sonnet",
diff --git a/server/routes/agent.js b/server/routes/agent.js
index 85e26c9d..f2273181 100644
--- a/server/routes/agent.js
+++ b/server/routes/agent.js
@@ -646,7 +646,7 @@ class ResponseCollector {
  *
  * @param {string} model - (Optional) Model identifier for providers.
  *
- *                        Claude models: 'sonnet' (default), 'opus', 'haiku', 'opusplan', 'sonnet[1m]'
+ *                        Claude models: 'sonnet' (default), 'opus', 'haiku', 'opusplan', 'sonnet[1m]', 'fable'
  *                        Cursor models: 'gpt-5' (default), 'gpt-5.2', 'gpt-5.2-high', 'sonnet-4.5', 'opus-4.5',
  *                                       'gemini-3-pro', 'composer-1', 'auto', 'gpt-5.1', 'gpt-5.1-high',
  *                                       'gpt-5.1-codex', 'gpt-5.1-codex-high', 'gpt-5.1-codex-max',