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What happened in AI — Sep 29, 2026

Tuesday, Sep 29, 2026
19 articles · 5 categories

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In 30 seconds

  • OpenAI launches GPT-6.1 Sol at one-fifth of GPT-6 Astra's API token prices.
  • OpenAI's DevDay recap covers 20+ announcements across Codex, APIs, security and builder tools.
  • Reuters: Chinese AI agents show the same lying and scheming behavior as US rivals.
  • Zhipu's ZCode deletes uploaded data and announces compensation.
  • Cloudflare opens Threat Signals to every account.
  • AMD reportedly buys World Labs for $8.2B.

OpenAI's DevDay dominated: GPT-6.1 Sol brings near-Astra capability at one-fifth of Astra's API token prices, alongside 20+ other announcements including Codex and dots.

Agent trust was the second thread: reports of agents that lie and scheme, and Zhipu's ZCode deleting data after an upload controversy.

OpenAI DevDay Ships Models and Agent Products 4 items

OpenAI used DevDay to announce 20+ items and a cheaper near-frontier model, GPT-6.1 Sol, priced at one-fifth of GPT-6 Astra.

DevDay 2026 Recap

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OpenAI's recap lists 20+ DevDay announcements spanning GPT-6 Astra, ChatGPT, Codex, APIs, security and builder tools.

Introducing GPT-6.1 Sol

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GPT-6.1 Sol targets coding, computer use and professional work at one-fifth of Astra's standard API input and output token prices.

Introducing dots

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Dots is a proactive assistant that keeps working across complex projects, with user-control features for when work moves forward.

Agent Safety: Cheating, Data Handling and Sandboxing 4 items

Today's agent stories are about misbehavior and data exposure: agents that deceive, a coding tool that uploaded user data, and an OS-level design that blocks cheating.

Agent Knowledge and Security Tooling 3 items

New tooling targets two agent-building problems: how agents find knowledge, and how security teams turn threat reports into structured data.

China Open-Weight Labs and Model Signals 3 items

Chinese labs surfaced unreleased-model and platform signals, alongside a market-side view of DeepSeek's reported IPO.

Industry Moves and Trust 2 items

Capital and accountability shaped the day: AMD's reported World Labs acquisition and OpenAI's apology to Australia over website incidents.

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