diff --git a/apps/web/src/components/github/open-pr-button.tsx b/apps/web/src/components/github/open-pr-button.tsx
new file mode 100644
index 00000000..e6527efa
--- /dev/null
+++ b/apps/web/src/components/github/open-pr-button.tsx
@@ -0,0 +1,80 @@
+"use client";
+
+import { useStreamContext } from "@/providers/Stream";
+import { TooltipIconButton } from "@/components/ui/tooltip-icon-button";
+import { useQueryState } from "nuqs";
+import {
+  GitPullRequest,
+  GitMerge,
+  GitPullRequestClosed,
+  GitPullRequestDraft,
+} from "lucide-react";
+import { useEffect, useState } from "react";
+import { getPullRequest } from "@/utils/github";
+import { cn } from "@/lib/utils";
+
+export function OpenPRButton() {
+  const stream = useStreamContext();
+  const [branch] = useQueryState("branch");
+  const [prState, setPrState] = useState<
+    "open" | "closed" | "draft" | "merged"
+  >();
+  const [pullRequest, setPullRequest] = useState<Record<string, any>>();
+
+  useEffect(() => {
+    const baseBranch =
+      stream.values.targetRepository?.branch ??
+      stream.values.targetRepository?.baseCommit ??
+      branch;
+    if (
+      !stream.values.branchName ||
+      !stream.values.targetRepository ||
+      !baseBranch
+    ) {
+      return;
+    }
+    getPullRequest({
+      owner: stream.values.targetRepository.owner,
+      repo: stream.values.targetRepository.repo,
+      baseBranch: baseBranch,
+      headBranch: stream.values.branchName,
+    }).then((pr) => {
+      if (!pr) return;
+      setPullRequest(pr);
+      if (pr.merged_at) {
+        setPrState("merged");
+      } else if (pr.draft) {
+        setPrState("draft");
+      } else {
+        setPrState(pr.state);
+      }
+    });
+  }, [stream.values?.branchName, stream.values.targetRepository, branch]);
+
+  if (!pullRequest) {
+    return null;
+  }
+
+  const handleOpenPR = () => {
+    window.open(pullRequest.html_url, "_blank", "noopener,noreferrer");
+  };
+
+  return (
+    <TooltipIconButton
+      tooltip={`Open Pull Request #${pullRequest.number}`}
+      variant="ghost"
+      onClick={handleOpenPR}
+      className={cn({
+        "text-green-500 hover:text-green-600": prState === "open",
+        "text-red-500 hover:text-red-600": prState === "closed",
+        "text-gray-500 hover:text-gray-600": prState === "draft",
+        "text-[#8957e5] hover:text-[#7847d1]": prState === "merged",
+      })}
+    >
+      {prState === "merged" && <GitMerge className="size-4" />}
+      {prState === "draft" && <GitPullRequestDraft className="size-4" />}
+      {prState === "closed" && <GitPullRequestClosed className="size-4" />}
+      {prState === "open" && <GitPullRequest className="size-4" />}
+    </TooltipIconButton>
+  );
+}
diff --git a/apps/web/src/components/thread/index.tsx b/apps/web/src/components/thread/index.tsx
index edeb55f0..308eb680 100644
--- a/apps/web/src/components/thread/index.tsx
+++ b/apps/web/src/components/thread/index.tsx
@@ -45,6 +45,7 @@ import { ConfigurationSidebar } from "../configuration-sidebar";
 import { DEFAULT_CONFIG_KEY, useConfigStore } from "@/hooks/useConfigStore";
 import { RepositoryBranchSelectors } from "../github/repo-branch-selectors";
 import { useRouter } from "next/navigation";
+import { OpenPRButton } from "../github/open-pr-button";
 import {
   Tooltip,
   TooltipContent,
@@ -115,6 +116,7 @@ export function Thread() {
     "chatHistoryOpen",
     parseAsBoolean.withDefault(false),
   );
+  const [baseBranch, setBaseBranch] = useQueryState("base-branch");
 
   const [configSidebarOpen, setConfigSidebarOpen] = useState(false);
 
@@ -446,6 +448,7 @@ export function Thread() {
 
               <div className="col-span-2 flex items-center justify-end gap-2 text-gray-700">
                 <GitHubOAuthButton />
+                <OpenPRButton />
                 <TooltipIconButton
                   tooltip="Configuration"
                   variant="ghost"
diff --git a/apps/web/src/utils/github.ts b/apps/web/src/utils/github.ts
index c0111ab3..9cebc664 100644
--- a/apps/web/src/utils/github.ts
+++ b/apps/web/src/utils/github.ts
@@ -238,3 +238,44 @@ export interface Branch {
   };
   protected: boolean;
 }
+
+/**
+ * Fetches a pull request for a specific repository using OAuth access token
+ */
+export async function getPullRequest(inputs: {
+  owner: string;
+  repo: string;
+  baseBranch: string;
+  headBranch: string;
+}) {
+  try {
+    const response = await fetch(
+      `${getBaseApiUrl()}github/proxy/repos/${inputs.owner}/${inputs.repo}/pulls?base=${inputs.baseBranch}&head=${inputs.headBranch}`,
+      {
+        headers: {
+          Accept: "application/vnd.github.v3+json",
+          "User-Agent": "OpenSWE-Agent",
+        },
+      },
+    );
+
+    if (!response.ok) {
+      const errorData = await response.json();
+      throw new Error(
+        `Failed to fetch pull request: ${JSON.stringify(errorData)}`,
+      );
+    }
+
+    const data = await response.json();
+    if (data && Array.isArray(data) && data.length > 0) {
+      return data.filter((d) => d.head?.ref === inputs.headBranch)[0];
+    }
+    return data?.[0];
+  } catch (e) {
+    console.error("Failed to get pull request", {
+      inputs,
+      error: e,
+    });
+    return null;
+  }
+}