diff --git a/docs/concepts/model-providers.md b/docs/concepts/model-providers.md
index 97ec18d00b6..0e7f7b82f24 100644
--- a/docs/concepts/model-providers.md
+++ b/docs/concepts/model-providers.md
@@ -371,7 +371,7 @@ OpenClaw ships with the pi‑ai catalog. These providers require **no**
 
 - Provider: `zai`
 - Auth: `ZAI_API_KEY`
-- Example model: `zai/glm-5`
+- Example model: `zai/glm-5.1`
 - CLI: `openclaw onboard --auth-choice zai-api-key`
   - Aliases: `z.ai/*` and `z-ai/*` normalize to `zai/*`
   - `zai-api-key` auto-detects the matching Z.AI endpoint; `zai-coding-global`, `zai-coding-cn`, `zai-global`, and `zai-cn` force a specific surface
diff --git a/docs/providers/glm.md b/docs/providers/glm.md
index 09ce30a4140..49524b83053 100644
--- a/docs/providers/glm.md
+++ b/docs/providers/glm.md
@@ -35,7 +35,7 @@ openclaw onboard --auth-choice zai-cn
 ```json5
 {
   env: { ZAI_API_KEY: "sk-..." },
-  agents: { defaults: { model: { primary: "zai/glm-5" } } },
+  agents: { defaults: { model: { primary: "zai/glm-5.1" } } },
 }
 ```
 
@@ -64,5 +64,5 @@ OpenClaw currently seeds the bundled `zai` provider with these GLM refs:
 ## Notes
 
 - GLM versions and availability can change; check Z.AI's docs for the latest.
-- Default bundled model ref is `zai/glm-5`.
+- Default bundled model ref is `zai/glm-5.1`.
 - For provider details, see [/providers/zai](/providers/zai).
diff --git a/docs/providers/zai.md b/docs/providers/zai.md
index 5ce9088cd2a..91a478fb28a 100644
--- a/docs/providers/zai.md
+++ b/docs/providers/zai.md
@@ -36,7 +36,7 @@ openclaw onboard --auth-choice zai-cn
 ```json5
 {
   env: { ZAI_API_KEY: "sk-..." },
-  agents: { defaults: { model: { primary: "zai/glm-5" } } },
+  agents: { defaults: { model: { primary: "zai/glm-5.1" } } },
 }
 ```
 
@@ -65,7 +65,7 @@ OpenClaw currently seeds the bundled `zai` provider with:
 ## Notes
 
 - GLM models are available as `zai/<model>` (example: `zai/glm-5`).
-- Default bundled model ref: `zai/glm-5`
+- Default bundled model ref: `zai/glm-5.1`
 - Unknown `glm-5*` ids still forward-resolve on the bundled provider path by
   synthesizing provider-owned metadata from the `glm-4.7` template when the id
   matches the current GLM-5 family shape.
diff --git a/extensions/zai/model-definitions.ts b/extensions/zai/model-definitions.ts
index 8f2365bb45b..70b951f9017 100644
--- a/extensions/zai/model-definitions.ts
+++ b/extensions/zai/model-definitions.ts
@@ -4,7 +4,7 @@ export const ZAI_CODING_GLOBAL_BASE_URL = "https://api.z.ai/api/coding/paas/v4";
 export const ZAI_CODING_CN_BASE_URL = "https://open.bigmodel.cn/api/coding/paas/v4";
 export const ZAI_GLOBAL_BASE_URL = "https://api.z.ai/api/paas/v4";
 export const ZAI_CN_BASE_URL = "https://open.bigmodel.cn/api/paas/v4";
-export const ZAI_DEFAULT_MODEL_ID = "glm-5";
+export const ZAI_DEFAULT_MODEL_ID = "glm-5.1";
 export const ZAI_DEFAULT_MODEL_REF = `zai/${ZAI_DEFAULT_MODEL_ID}`;
 
 type ZaiCatalogEntry = {