Open beta Zabio is in open beta: anyone can sign up and use it in production. Models, prices and features can still change while we learn from the first customers. Tell us what breaks at hello@zabio.ai.
Menu
Start free
All news
openaiModel

OpenAI releases GPT-6.1 Sol

OpenAI released GPT-6.1 Sol (gpt-6.1-sol) for complex coding and professional work at a lower cost than GPT-6 Astra.

Models:gpt-6.1-solGPT-6 Astra

What changed

OpenAI released GPT-6.1 Sol with API id gpt-6.1-sol on September 29, 2026. The model is built for complex coding and professional work at a lower cost than GPT-6 Astra. Developers use the Responses API for tool calling.

What it means for Zabio customers

GPT-6 Astra is in the Zabio catalog in the frontier tier and auto routing uses it. GPT-6.1 Sol is not yet in the Zabio catalog.

What Zabio does

Catalog change under review. Not in the Zabio catalog yet: gpt-6.1-sol.

Source

Released GPT-6.1 Sol (gpt-6.1-sol) for complex coding and professional work at a lower cost than GPT-6 Astra.

Original announcement: OpenAI API changelog

Published automatically from the official announcement, minutes after it appeared. Reviewed by a person within the day.

Source: OpenAI API changelog (2026-09-29)