March 10, 2026 | Synthflow

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