From f24487be87b3b74bc56e2b98348a116efc752ee6 Mon Sep 17 00:00:00 2001
From: bennycortese <bennycortese@gmail.com>
Date: Fri, 31 Oct 2025 01:14:30 -0700
Subject: [PATCH 1/2] So when I ran stagehand.agent out of the box, I kept
 getting the model set to gpt-4.1-mini by default. This seems to be because
 the Vercel AI SDK is used as the default for logging, and the model  isn't
 ever getting set to openai/gpt-4.1-mini. This should fix both issues and
 hopefully fix default model configs for all provides

---
 packages/core/lib/v3/v3.ts | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/packages/core/lib/v3/v3.ts b/packages/core/lib/v3/v3.ts
index 88bf0f196..66c6c697e 100644
--- a/packages/core/lib/v3/v3.ts
+++ b/packages/core/lib/v3/v3.ts
@@ -1371,7 +1371,7 @@ export class V3 {
           ? typeof options?.model === "string"
             ? { value: options.model, type: "string" }
             : { value: options.model.modelName, type: "string" }
-          : { value: this.llmClient.modelName, type: "string" },
+          : { value: this.modelName, type: "string" },
         systemPrompt: { value: options?.systemPrompt ?? "", type: "string" },
         tools: { value: JSON.stringify(options?.tools ?? {}), type: "object" },
         ...(options?.integrations && {
@@ -1473,8 +1473,13 @@ export class V3 {
             try {
               if (this.apiClient && !this.experimental) {
                 const page = await this.ctx!.awaitActivePage();
+                // Ensure model is set for API calls - use the resolved modelName
+                const agentConfigWithModel: AgentConfig = {
+                  ...options,
+                  model: options?.model || modelName,
+                };
                 result = await this.apiClient.agentExecute(
-                  options,
+                  agentConfigWithModel,
                   resolvedOptions,
                   page.mainFrameId(),
                 );
@@ -1576,8 +1581,13 @@ export class V3 {
           try {
             if (this.apiClient && !this.experimental) {
               const page = await this.ctx!.awaitActivePage();
+              // Ensure model is set for API calls - default to V3's modelName if not specified
+              const agentConfigWithModel: AgentConfig = {
+                ...options,
+                model: options?.model || this.modelName,
+              };
               result = await this.apiClient.agentExecute(
-                options,
+                agentConfigWithModel,
                 resolvedOptions,
                 page.mainFrameId(),
               );

From e6f6d86221e93dc3d0a314598f7d391ac4878069 Mon Sep 17 00:00:00 2001
From: bennycortese <bennycortese@gmail.com>
Date: Fri, 31 Oct 2025 01:18:28 -0700
Subject: [PATCH 2/2] Changeset added

---
 .changeset/whole-goats-clap.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/whole-goats-clap.md

diff --git a/.changeset/whole-goats-clap.md b/.changeset/whole-goats-clap.md
new file mode 100644
index 000000000..44d25085c
--- /dev/null
+++ b/.changeset/whole-goats-clap.md
@@ -0,0 +1,5 @@
+---
+"@browserbasehq/stagehand": minor
+---
+
+Default model providers don't seem to be working correctly in Stagehand V3 when a model isn't specified - this diff should fix that and fix the associated logging