diff --git a/.github/workflows/shared/genaiscript.md b/.github/workflows/shared/genaiscript.md
index f6b7f52871d..4feef38425c 100644
--- a/.github/workflows/shared/genaiscript.md
+++ b/.github/workflows/shared/genaiscript.md
@@ -3,7 +3,7 @@ engine:
   id: custom
   env:
     GH_AW_AGENT_VERSION: "2.5.1"
-    GH_AW_AGENT_MODEL_VERSION: "github:gpt-4o-mini"
+    GH_AW_AGENT_MODEL_VERSION: "openai:gpt-4.1"
   steps:
     - name: Install GenAIScript
       run: npm install -g genaiscript@${GH_AW_AGENT_VERSION} && genaiscript --version
@@ -57,6 +57,6 @@ imports:
 **Note**: 
 - This workflow requires internet access to install npm packages
 - The genaiscript version can be customized by setting the `GH_AW_AGENT_VERSION` environment variable (default: `2.5.1`)
-- The AI model can be customized by setting the `GH_AW_AGENT_MODEL_VERSION` environment variable (default: `gpt-4o-mini`)
+- The AI model can be customized by setting the `GH_AW_AGENT_MODEL_VERSION` environment variable (default: `openai:gpt-4.1`)
 - MCP server configuration is automatically passed if configured in the workflow
 -->
diff --git a/.github/workflows/smoke-genaiscript.lock.yml b/.github/workflows/smoke-genaiscript.lock.yml
index df3bd3ad7eb..9ae1a334760 100644
--- a/.github/workflows/smoke-genaiscript.lock.yml
+++ b/.github/workflows/smoke-genaiscript.lock.yml
@@ -1109,7 +1109,7 @@ jobs:
       - name: Install GenAIScript
         run: npm install -g genaiscript@${GH_AW_AGENT_VERSION} && genaiscript --version
         env:
-          GH_AW_AGENT_MODEL_VERSION: github:gpt-4o-mini
+          GH_AW_AGENT_MODEL_VERSION: openai:gpt-4.1
           GH_AW_AGENT_VERSION: 2.5.1
           GH_AW_MCP_CONFIG: /tmp/gh-aw/mcp-config/mcp-servers.json
           GH_AW_PROMPT: /tmp/gh-aw/aw-prompts/prompt.txt
@@ -1128,7 +1128,7 @@ jobs:
           echo "Generated GenAI prompt file:"
           cat /tmp/gh-aw/aw-prompts/prompt.genai.md
         env:
-          GH_AW_AGENT_MODEL_VERSION: github:gpt-4o-mini
+          GH_AW_AGENT_MODEL_VERSION: openai:gpt-4.1
           GH_AW_AGENT_VERSION: 2.5.1
           GH_AW_MCP_CONFIG: /tmp/gh-aw/mcp-config/mcp-servers.json
           GH_AW_PROMPT: /tmp/gh-aw/aw-prompts/prompt.txt
@@ -1140,7 +1140,7 @@ jobs:
         run: genaiscript run /tmp/gh-aw/aw-prompts/prompt.genai.md --mcp-config $GH_AW_MCP_CONFIG --out /tmp/gh-aw/genaiscript-output.md
         env:
           DEBUG: genaiscript:*
-          GH_AW_AGENT_MODEL_VERSION: github:gpt-4o-mini
+          GH_AW_AGENT_MODEL_VERSION: openai:gpt-4.1
           GH_AW_AGENT_VERSION: 2.5.1
           GH_AW_MCP_CONFIG: /tmp/gh-aw/mcp-config/mcp-servers.json
           GH_AW_PROMPT: /tmp/gh-aw/aw-prompts/prompt.txt
@@ -2385,7 +2385,7 @@ jobs:
       - name: Install GenAIScript
         run: npm install -g genaiscript@${GH_AW_AGENT_VERSION} && genaiscript --version
         env:
-          GH_AW_AGENT_MODEL_VERSION: github:gpt-4o-mini
+          GH_AW_AGENT_MODEL_VERSION: openai:gpt-4.1
           GH_AW_AGENT_VERSION: 2.5.1
           GH_AW_MCP_CONFIG: /tmp/gh-aw/mcp-config/mcp-servers.json
           GH_AW_PROMPT: /tmp/gh-aw/aw-prompts/prompt.txt
@@ -2404,7 +2404,7 @@ jobs:
           echo "Generated GenAI prompt file:"
           cat /tmp/gh-aw/aw-prompts/prompt.genai.md
         env:
-          GH_AW_AGENT_MODEL_VERSION: github:gpt-4o-mini
+          GH_AW_AGENT_MODEL_VERSION: openai:gpt-4.1
           GH_AW_AGENT_VERSION: 2.5.1
           GH_AW_MCP_CONFIG: /tmp/gh-aw/mcp-config/mcp-servers.json
           GH_AW_PROMPT: /tmp/gh-aw/aw-prompts/prompt.txt
@@ -2416,7 +2416,7 @@ jobs:
         run: genaiscript run /tmp/gh-aw/aw-prompts/prompt.genai.md --mcp-config $GH_AW_MCP_CONFIG --out /tmp/gh-aw/genaiscript-output.md
         env:
           DEBUG: genaiscript:*
-          GH_AW_AGENT_MODEL_VERSION: github:gpt-4o-mini
+          GH_AW_AGENT_MODEL_VERSION: openai:gpt-4.1
           GH_AW_AGENT_VERSION: 2.5.1
           GH_AW_MCP_CONFIG: /tmp/gh-aw/mcp-config/mcp-servers.json
           GH_AW_PROMPT: /tmp/gh-aw/aw-prompts/prompt.txt