Use gpt-5.1-codex-mini as default model in Ralph loop recipes

Author: tonybaloney

cookbook/copilot-sdk/dotnet/ralph-loop.md

@@ -58,7 +58,7 @@ try
 
         // Fresh session each iteration — context isolation is the point
         var session = await client.CreateSessionAsync(
-            new SessionConfig { Model = "claude-sonnet-4.5" });
+            new SessionConfig { Model = "gpt-5.1-codex-mini" });
         try
         {
             var done = new TaskCompletionSource<string>();
@@ -121,7 +121,7 @@ try
         var session = await client.CreateSessionAsync(
             new SessionConfig
             {
-                Model = "claude-sonnet-4.5",
+                Model = "gpt-5.1-codex-mini",
                 // Pin the agent to the project directory
                 WorkingDirectory = Environment.CurrentDirectory,
                 // Auto-approve tool calls for unattended operation

cookbook/copilot-sdk/dotnet/recipe/ralph-loop.cs

@@ -45,7 +45,7 @@
         var session = await client.CreateSessionAsync(
             new SessionConfig
             {
-                Model = "claude-sonnet-4.5",
+                Model = "gpt-5.1-codex-mini",
                 // Pin the agent to the project directory
                 WorkingDirectory = Environment.CurrentDirectory,
                 // Auto-approve tool calls for unattended operation

cookbook/copilot-sdk/go/ralph-loop.md

@@ -70,7 +70,7 @@ func ralphLoop(ctx context.Context, promptFile string, maxIterations int) error
 
 		// Fresh session each iteration — context isolation is the point
 		session, err := client.CreateSession(ctx, &copilot.SessionConfig{
-			Model: "claude-sonnet-4.5",
+			Model: "gpt-5.1-codex-mini",
 		})
 		if err != nil {
 			return err
@@ -145,7 +145,7 @@ func ralphLoop(ctx context.Context, mode string, maxIterations int) error {
 		fmt.Printf("\n=== Iteration %d/%d ===\n", i, maxIterations)
 
 		session, err := client.CreateSession(ctx, &copilot.SessionConfig{
-			Model:            "claude-sonnet-4.5",
+			Model:            "gpt-5.1-codex-mini",
 			WorkingDirectory: cwd,
 			OnPermissionRequest: func(_ copilot.PermissionRequest, _ map[string]string) copilot.PermissionRequestResult {
 				return copilot.PermissionRequestResult{Kind: "approved"}

cookbook/copilot-sdk/go/recipe/ralph-loop.go

@@ -56,7 +56,7 @@ func ralphLoop(ctx context.Context, mode string, maxIterations int) error {
 		fmt.Printf("\n=== Iteration %d/%d ===\n", i, maxIterations)
 
 		session, err := client.CreateSession(ctx, &copilot.SessionConfig{
-			Model:            "claude-sonnet-4.5",
+			Model:            "gpt-5.1-codex-mini",
 			WorkingDirectory: cwd,
 			OnPermissionRequest: func(_ copilot.PermissionRequest, _ map[string]string) copilot.PermissionRequestResult {
 				return copilot.PermissionRequestResult{Kind: "approved"}

cookbook/copilot-sdk/nodejs/ralph-loop.md

@@ -56,7 +56,7 @@ async function ralphLoop(promptFile: string, maxIterations: number = 50) {
             console.log(`\n=== Iteration ${i}/${maxIterations} ===`);
 
             // Fresh session each iteration — context isolation is the point
-            const session = await client.createSession({ model: "claude-sonnet-4.5" });
+            const session = await client.createSession({ model: "gpt-5.1-codex-mini" });
             try {
                 await session.sendAndWait({ prompt }, 600_000);
             } finally {
@@ -100,7 +100,7 @@ async function ralphLoop(mode: Mode, maxIterations: number = 50) {
             console.log(`\n=== Iteration ${i}/${maxIterations} ===`);
 
             const session = await client.createSession({
-                model: "claude-sonnet-4.5",
+                model: "gpt-5.1-codex-mini",
                 // Pin the agent to the project directory
                 workingDirectory: process.cwd(),
                 // Auto-approve tool calls for unattended operation