fix: prefer chat api over responses api for openai agents (#38)

Author: hugodutka

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,20 +1,22 @@
 ---
 name: Bug report
 about: Create a report to help us improve Blink
-title: ''
+title: ""
 labels: Bug
-assignees: ''
-
+assignees: ""
 ---
 
 ## Describe the bug
+
 A clear and concise description of what the bug is.
 
 ## Environment
+
 - **OS**: [e.g., macOS 14.2, Windows 11, Ubuntu 22.04]
 - **Node.js version**: [Run `node --version`]
 - **Blink version**: [Run `blink --version`]
 - **Installation method**: [npm, yarn, pnpm, or bun]
 
 ## Additional Context
+
 Add any other context, error messages, or screenshots.

packages/blink/src/cli/init-templates/index.ts

@@ -14,12 +14,7 @@ agent.on("chat", async ({ messages }) => {
 {{#if (eq aiProvider "anthropic")}}
     model: anthropic("claude-sonnet-4-5"),
 {{else if (eq aiProvider "openai")}}
-    model: openai("gpt-5-codex"),
-    providerOptions: {
-      openai: {
-        reasoningSummary: "detailed",
-      },
-    },
+    model: openai.chat("gpt-5"),
 {{else if (eq aiProvider "vercel")}}
     model: "anthropic/claude-sonnet-4.5",
 {{else}}

packages/blink/src/cli/init-templates/scratch/agent.ts.hbs

@@ -90,12 +90,7 @@ agent.on("chat", async ({ messages }) => {
 {{#if (eq aiProvider "anthropic")}}
     model: anthropic("claude-sonnet-4-5"),
 {{else if (eq aiProvider "openai")}}
-    model: openai("gpt-5-codex"),
-    providerOptions: {
-      openai: {
-        reasoningSummary: "detailed",
-      },
-    },
+    model: openai.chat("gpt-5"),
 {{else if (eq aiProvider "vercel")}}
     model: "anthropic/claude-sonnet-4.5",
 {{else}}

packages/blink/src/cli/init-templates/slack-bot/agent.ts.hbs

@@ -199,7 +199,7 @@ describe("getFilesForTemplate", () => {
 
       const agentTs = getFile(files, "agent.ts");
       expect(agentTs).toContain('import { openai } from "@ai-sdk/openai"');
-      expect(agentTs).toContain('model: openai("gpt-5-codex")');
+      expect(agentTs).toContain('model: openai.chat("gpt-5")');
       expect(agentTs).not.toContain("import { anthropic }");
     });
 

packages/blink/src/cli/init.test.ts

@@ -666,7 +666,8 @@ export function getEditModeModel(
   if (env.OPENAI_API_KEY) {
     return createOpenAI({
       apiKey: env.OPENAI_API_KEY,
-    }).responses("gpt-5");
+      // avoid the responses API due to https://github.com/coder/blink/issues/34#issuecomment-3426704264
+    }).chat("gpt-5");
   }
 
   // Priority 3: Use AI Gateway if API key is set