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OpenAI

OpenAI, September 2026 new features

24 releases · 2 products · 3 GA · 1 Beta · 1 Pricing

Aug 2026
DateRelease
Sep 22Introducing GPT-6 Sol and Luna
ChatGPTUpdate
Sep 22OpenAI releases GPT-6 Sol and GPT-6 Luna reasoning models
OpenAI APIUpdate
Sep 17Introducing Astra for Law
ChatGPTUpdate
Sep 16Reimagining advertising with AI
ChatGPTUpdate
Sep 15OpenAI API adds API key creation governance controls
OpenAI APIUpdate
Sep 10Build more natural voice experiences with GPT‑Live‑1 in the API
OpenAI APIUpdate
Sep 10Expanding AI access and cyber defense for federal, state, local, and tribal governments
ChatGPTPricing
Sep 10Introducing ChatGPT for Financial Services
ChatGPTUpdate
Sep 10Introducing the Agents API
OpenAI APIUpdate
Sep 10Now everyone can put data to work
ChatGPTUpdate
Sep 10OpenAI Agents API enters public beta
OpenAI APIBeta
Sep 10OpenAI GPT-Live 1 is generally available for full-duplex voice
OpenAI APIGA
Sep 10OpenAI project API keys support expiration dates
OpenAI APIUpdate
Sep 9GPT-6 Astra: The next generation in intelligence for work
ChatGPTUpdate
Sep 8Introducing ChatGPT Images 2.5
ChatGPTUpdate
Sep 8OpenAI GPT-Rosalind is GA for approved life sciences research
OpenAI APIGA
Sep 8OpenAI Prompt Cache Diagnostics is generally available in the Responses API
OpenAI APIGA
Sep 8OpenAI releases GPT Image 2.5 Sunburst and GPT Image 2.5 Flare
OpenAI APIUpdate
Sep 3GPT-6 Astra: A new generation of intelligence
ChatGPTUpdate
Sep 3OpenAI Responses API adds async tool calling and mid-turn steering for GPT-6 Astra
OpenAI APIUpdate
Sep 3OpenAI releases GPT-6 Astra for complex end-to-end work
OpenAI APIUpdate
Sep 2OpenAI API separates slow_down 429s from server_is_overloaded 503s
OpenAI APIUpdate
Sep 1Healthcare organizations can now connect EHR and additional industry data to ChatGPT
ChatGPTUpdate
Sep 1OpenAI API supports IPv6 connections to api.openai.com
OpenAI APIUpdate

Summaries of vendors' own notes. Product names and logos belong to their owners; logos via logo.dev.

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