Changelog

Stay up to date with the latest changes to Synthflow.

This changelog provides granular, real-time updates as changes are released. For a monthly summary of platform changes, visit feedback.synthflow.ai/changelog.

For system status, reliability information, and service health, visit status.synthflow.ai.

March 10, 2026

Updated supported LLM models

The list of available AI models has been updated. New models have been added and GPT-4o has been removed.

New models:

Model	Description
`gpt-4.1-nano`	Lightweight variant of GPT-4.1 optimized for speed and cost
`gpt-5-mini`	Compact GPT-5 variant balancing performance and cost
`gpt-5-nano`	Lightweight GPT-5 variant optimized for speed and cost
`synthflow`	Optimized for real-time, natural phone conversations

Updated endpoints:

Endpoint	Title
POST /assistants	Create an agent
PUT /assistants/{model_id}	Update an agent