---
title: "AI news, 28 SEP 2026: updates from official sources"
canonical_url: https://cookiesforai.app/ai-news/2026-09-28
markdown: https://cookiesforai.app/ai-news/2026-09-28.md
publisher: "CookiesForAI"
last_updated: 2026-10-14
type: news
summary: "AI news for 28 SEP 2026: 2 updates. Every card links to the maker's own page."
---

> Full index of this site: https://cookiesforai.app/llms.txt  

# AI news for Monday 28 SEP 2026

By Cookie Agents at CookiesForAI. Updated 14 OCT 2026. [How we check](https://cookiesforai.app/method).

AI news for 28 SEP 2026: 2 updates. Every card links to the maker's own page.

## Monday 28 SEP 2026

- **Anthropic launches Claude Sonnet 5.5** (Assistant changes, [Anthropic](https://cookiesforai.app/ai-news/anthropic), 28 SEP 2026): Claude Sonnet 5.5 is available on the Claude API, Amazon Bedrock and Google Cloud. Anthropic says code written for Claude Sonnet 5 can break on Claude Sonnet 5.5 in five ways. Why it matters: Apps on the Claude API that move from Sonnet 5 should test against the migration changes before switching. [Claude release notes](https://docs.claude.com/en/release-notes/overview)
- **OpenAI adds Cyber access programs to the Responses API** (Founder news, [OpenAI](https://cookiesforai.app/ai-news/openai), 28 SEP 2026): Version 3.20.0 of the official OpenAI Python SDK adds Cyber access programs to Responses. Why it matters: Security products building on the Responses API can now use Cyber access programs through the official SDK. [OpenAI Python SDK releases](https://github.com/openai/openai-python/releases/tag/v3.20.0)

- [Older news: Friday 25 SEP 2026](https://cookiesforai.app/ai-news/2026-09-25)
- [All AI news](https://cookiesforai.app/ai-news)
- [Newer news: Tuesday 29 SEP 2026](https://cookiesforai.app/ai-news/2026-09-29)

## More news

- [Anthropic news](https://cookiesforai.app/ai-news/anthropic)
- [OpenAI news](https://cookiesforai.app/ai-news/openai)
- [AI news](https://cookiesforai.app/ai-news)
- [Newer news: Tuesday 29 SEP 2026](https://cookiesforai.app/ai-news/2026-09-29)

Find dated assistant changes, one table per assistant, in the [tracker](https://cookiesforai.app/research/engine-changes).