https://openaiupdates.com/updates/Independent, selected OpenAI changes with practical context. Not affiliated with OpenAI.enhttps://openaiupdates.com/updates/#agents-api-betahttps://openaiupdates.com/updates/#agents-api-betaAnnounced 2026-09-10; source reviewed 2026-09-11. OpenAI introduced a managed agent harness with durable sessions and hosted or connected sandboxes. Our take: A managed harness is an architectural choice, not simply a model-name replacement. Prototype one bounded task. Check recovery, permissions and costs before committing an existing workflow.apihttps://openaiupdates.com/updates/#api-key-expirationhttps://openaiupdates.com/updates/#api-key-expirationAnnounced 2026-09-10; source reviewed 2026-09-11. New project keys can expire; administrators can set maximum lifetimes at organization or project level. Our take: A credential can stop working even when application code is unchanged. Inventory owners and renewal procedures. Test replacement credentials safely; do not revoke working keys without a migration plan.apibusinesshttps://openaiupdates.com/updates/#prompt-cache-diagnosticshttps://openaiupdates.com/updates/#prompt-cache-diagnosticsAnnounced 2026-09-08; source reviewed 2026-09-11. Responses API cache diagnostics are generally available for GPT-5.6 and later supported models. Our take: A cache miss needs diagnosis before it needs a bigger infrastructure change. Compare a representative miss with a previous response. Change one input variable at a time and measure the next run.apihttps://openaiupdates.com/updates/#codex-mcp-server-removalhttps://openaiupdates.com/updates/#codex-mcp-server-removalAnnounced 2026-09-05; source reviewed 2026-09-11. The codex mcp-server command and codex-mcp-server binary were removed after their August deprecation. Our take: Launching the removed command can break an integration; ordinary external MCP connections are a different case. Inspect your launch configuration before upgrading. Evaluate the documented migration and its experimental status.codexhttps://openaiupdates.com/updates/#sites-previewhttps://openaiupdates.com/updates/#sites-previewAnnounced 2026-06-02; source reviewed 2026-09-11. OpenAI announced Sites preview in the Codex app, with Business inclusion and Enterprise role-based enablement. Our take: Generating a website and authorizing its publication are separate decisions. Start with a non-sensitive draft. Review hosting, access and data handling before publishing or connecting business information.chatgptbusiness