diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 35d9fe3..99407a3 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -36,4 +36,4 @@ jobs:
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           allowed_tools: "Bash(bun install),Bash(bun test:*),Bash(bun run format),Bash(bun typecheck)"
           custom_instructions: "You have also been granted tools for editing files and running bun commands (install, run, test, typecheck) for testing your changes: bun install, bun test, bun run format, bun typecheck."
-          model: "claude-opus-4-20250514"
+          model: "claude-opus-4-1-20250805"
diff --git a/action.yml b/action.yml
index 1aa8b2e..6b7f283 100644
--- a/action.yml
+++ b/action.yml
@@ -160,7 +160,7 @@ runs:
         echo "Base-action dependencies installed"
         cd -
         # Install Claude Code globally
-        bun install -g @anthropic-ai/claude-code@1.0.69
+        bun install -g @anthropic-ai/claude-code@1.0.70
 
     - name: Setup Network Restrictions
       if: steps.prepare.outputs.contains_trigger == 'true' && inputs.experimental_allowed_domains != ''
diff --git a/base-action/README.md b/base-action/README.md
index 2166511..2a9a863 100644
--- a/base-action/README.md
+++ b/base-action/README.md
@@ -69,7 +69,7 @@ Add the following to your workflow file:
   uses: anthropics/claude-code-base-action@beta
   with:
     prompt: "Review and fix TypeScript errors"
-    model: "claude-opus-4-20250514"
+    model: "claude-opus-4-1-20250805"
     fallback_model: "claude-sonnet-4-20250514"
     allowed_tools: "Bash(git:*),View,GlobTool,GrepTool,BatchTool"
     anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
@@ -217,7 +217,7 @@ Provide the settings configuration directly as a JSON string:
     prompt: "Your prompt here"
     settings: |
       {
-        "model": "claude-opus-4-20250514",
+        "model": "claude-opus-4-1-20250805",
         "env": {
           "DEBUG": "true",
           "API_URL": "https://api.example.com"
diff --git a/base-action/action.yml b/base-action/action.yml
index 250db3d..a9d626a 100644
--- a/base-action/action.yml
+++ b/base-action/action.yml
@@ -118,7 +118,7 @@ runs:
 
     - name: Install Claude Code
       shell: bash
-      run: bun install -g @anthropic-ai/claude-code@1.0.69
+      run: bun install -g @anthropic-ai/claude-code@1.0.70
 
     - name: Run Claude Code Action
       shell: bash
diff --git a/base-action/test/setup-claude-code-settings.test.ts b/base-action/test/setup-claude-code-settings.test.ts
index c5a103b..19cf0cd 100644
--- a/base-action/test/setup-claude-code-settings.test.ts
+++ b/base-action/test/setup-claude-code-settings.test.ts
@@ -134,7 +134,7 @@ describe("setupClaudeCodeSettings", () => {
     // Then, add new settings
     const newSettings = JSON.stringify({
       newKey: "newValue",
-      model: "claude-opus-4-20250514",
+      model: "claude-opus-4-1-20250805",
     });
 
     await setupClaudeCodeSettings(newSettings, testHomeDir);
@@ -145,7 +145,7 @@ describe("setupClaudeCodeSettings", () => {
     expect(settings.enableAllProjectMcpServers).toBe(true);
     expect(settings.existingKey).toBe("existingValue");
     expect(settings.newKey).toBe("newValue");
-    expect(settings.model).toBe("claude-opus-4-20250514");
+    expect(settings.model).toBe("claude-opus-4-1-20250805");
   });
 
   test("should copy slash commands to .claude directory when path provided", async () => {
diff --git a/docs/configuration.md b/docs/configuration.md
index 5d3d125..ec0f317 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -252,7 +252,7 @@ You can provide Claude Code settings to customize behavior such as model selecti
   with:
     settings: |
       {
-        "model": "claude-opus-4-20250514",
+        "model": "claude-opus-4-1-20250805",
         "env": {
           "DEBUG": "true",
           "API_URL": "https://api.example.com"
diff --git a/src/mcp/github-inline-comment-server.ts b/src/mcp/github-inline-comment-server.ts
new file mode 100644
index 0000000..28a8658
--- /dev/null
+++ b/src/mcp/github-inline-comment-server.ts
@@ -0,0 +1,178 @@
+#!/usr/bin/env node
+import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
+import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
+import { z } from "zod";
+import { createOctokit } from "../github/api/client";
+
+// Get repository and PR information from environment variables
+const REPO_OWNER = process.env.REPO_OWNER;
+const REPO_NAME = process.env.REPO_NAME;
+const PR_NUMBER = process.env.PR_NUMBER;
+
+if (!REPO_OWNER || !REPO_NAME || !PR_NUMBER) {
+  console.error(
+    "Error: REPO_OWNER, REPO_NAME, and PR_NUMBER environment variables are required",
+  );
+  process.exit(1);
+}
+
+// GitHub Inline Comment MCP Server - Provides inline PR comment functionality
+// Provides an inline comment tool without exposing full PR review capabilities, so that
+// Claude can't accidentally approve a PR
+const server = new McpServer({
+  name: "GitHub Inline Comment Server",
+  version: "0.0.1",
+});
+
+server.tool(
+  "create_inline_comment",
+  "Create an inline comment on a specific line or lines in a PR file",
+  {
+    path: z
+      .string()
+      .describe("The file path to comment on (e.g., 'src/index.js')"),
+    body: z
+      .string()
+      .describe(
+        "The comment text (supports markdown and GitHub code suggestion blocks). " +
+          "For code suggestions, use: ```suggestion\\nreplacement code\\n```. " +
+          "IMPORTANT: The suggestion block will REPLACE the ENTIRE line range (single line or startLine to line). " +
+          "Ensure the replacement is syntactically complete and valid - it must work as a drop-in replacement for the selected lines.",
+      ),
+    line: z
+      .number()
+      .optional()
+      .describe(
+        "Line number for single-line comments (required if startLine is not provided)",
+      ),
+    startLine: z
+      .number()
+      .optional()
+      .describe(
+        "Start line for multi-line comments (use with line parameter for the end line)",
+      ),
+    side: z
+      .enum(["LEFT", "RIGHT"])
+      .optional()
+      .default("RIGHT")
+      .describe(
+        "Side of the diff to comment on: LEFT (old code) or RIGHT (new code)",
+      ),
+    commit_id: z
+      .string()
+      .optional()
+      .describe(
+        "Specific commit SHA to comment on (defaults to latest commit)",
+      ),
+  },
+  async ({ path, body, line, startLine, side, commit_id }) => {
+    try {
+      const githubToken = process.env.GITHUB_TOKEN;
+
+      if (!githubToken) {
+        throw new Error("GITHUB_TOKEN environment variable is required");
+      }
+
+      const owner = REPO_OWNER;
+      const repo = REPO_NAME;
+      const pull_number = parseInt(PR_NUMBER, 10);
+
+      const octokit = createOctokit(githubToken).rest;
+
+      // Validate that either line or both startLine and line are provided
+      if (!line && !startLine) {
+        throw new Error(
+          "Either 'line' for single-line comments or both 'startLine' and 'line' for multi-line comments must be provided",
+        );
+      }
+
+      // If only line is provided, it's a single-line comment
+      // If both startLine and line are provided, it's a multi-line comment
+      const isSingleLine = !startLine;
+
+      const pr = await octokit.pulls.get({
+        owner,
+        repo,
+        pull_number,
+      });
+
+      const params: Parameters<
+        typeof octokit.rest.pulls.createReviewComment
+      >[0] = {
+        owner,
+        repo,
+        pull_number,
+        body,
+        path,
+        side: side || "RIGHT",
+        commit_id: commit_id || pr.data.head.sha,
+      };
+
+      if (isSingleLine) {
+        // Single-line comment
+        params.line = line;
+      } else {
+        // Multi-line comment
+        params.start_line = startLine;
+        params.start_side = side || "RIGHT";
+        params.line = line;
+      }
+
+      const result = await octokit.rest.pulls.createReviewComment(params);
+
+      return {
+        content: [
+          {
+            type: "text",
+            text: JSON.stringify(
+              {
+                success: true,
+                comment_id: result.data.id,
+                html_url: result.data.html_url,
+                path: result.data.path,
+                line: result.data.line || result.data.original_line,
+                message: `Inline comment created successfully on ${path}${isSingleLine ? ` at line ${line}` : ` from line ${startLine} to ${line}`}`,
+              },
+              null,
+              2,
+            ),
+          },
+        ],
+      };
+    } catch (error) {
+      const errorMessage =
+        error instanceof Error ? error.message : String(error);
+
+      // Provide more helpful error messages for common issues
+      let helpMessage = "";
+      if (errorMessage.includes("Validation Failed")) {
+        helpMessage =
+          "\n\nThis usually means the line number doesn't exist in the diff or the file path is incorrect. Make sure you're commenting on lines that are part of the PR's changes.";
+      } else if (errorMessage.includes("Not Found")) {
+        helpMessage =
+          "\n\nThis usually means the PR number, repository, or file path is incorrect.";
+      }
+
+      return {
+        content: [
+          {
+            type: "text",
+            text: `Error creating inline comment: ${errorMessage}${helpMessage}`,
+          },
+        ],
+        error: errorMessage,
+        isError: true,
+      };
+    }
+  },
+);
+
+async function runServer() {
+  const transport = new StdioServerTransport();
+  await server.connect(transport);
+  process.on("exit", () => {
+    server.close();
+  });
+}
+
+runServer().catch(console.error);
diff --git a/src/mcp/install-mcp-server.ts b/src/mcp/install-mcp-server.ts
index 61b11d6..9a87f12 100644
--- a/src/mcp/install-mcp-server.ts
+++ b/src/mcp/install-mcp-server.ts
@@ -111,6 +111,24 @@ export async function prepareMcpConfig(
       };
     }
 
+    // Include inline comment server for experimental review mode
+    if (context.inputs.mode === "experimental-review" && context.isPR) {
+      baseMcpConfig.mcpServers.github_inline_comment = {
+        command: "bun",
+        args: [
+          "run",
+          `${process.env.GITHUB_ACTION_PATH}/src/mcp/github-inline-comment-server.ts`,
+        ],
+        env: {
+          GITHUB_TOKEN: githubToken,
+          REPO_OWNER: owner,
+          REPO_NAME: repo,
+          PR_NUMBER: context.entityNumber?.toString() || "",
+          GITHUB_API_URL: GITHUB_API_URL,
+        },
+      };
+    }
+
     // Only add CI server if we have actions:read permission and we're in a PR context
     const hasActionsReadPermission =
       context.inputs.additionalPermissions.get("actions") === "read";