Minor ML Upgrade: Clearer Outcomes for Tool Calls - Standard Release

We've released the Clearer Outcomes for Tool Calls model upgrade to Standard customers.
 

How are we improving the Assistant’s behavior?

Failed or empty tool calls now show a clear failure or no-results state, along with guidance on what the user can do next, instead of appearing successful.

When is the release date?

• Frontier: September 9, 2026
• Standard: September 14, 2026
• Basic: September 17, 2026

Technical Restrictions

This initial release primarily covers Agent Studio Plugins. MCP failure transparency, and more specific action-error messages are not included in this release and are being handled as separate follow-up work.

Documentation

Documentation describing reasoning and tool-failure behavior will be linked here when published.

Read more about the release here.
Learn more about our model upgrade program here.