OpenAI dominated eight AI releases on 29 September, introducing GPT-6.1 Sol and Dots and recapping DevDay 2026. Microsoft advanced Fabric IQ for Copilot context, Meta expanded its Muse agent for small business, and Multiverse Computing launched ProvenanceGuard for MCP agents.
Tuesday 29 September 2026 (America/Los_Angeles source-local date) · 8 releases · MediaRelease.co editorial digest
OpenAI published a system card addendum for GPT-6.1 Sol covering updated safety metrics and preparedness ratings. It treats the model as Critical for cybersecurity and High for biological and chemical capability, using Astra’s safeguards stack.
OpenAI’s DevDay 2026 recap lists more than 20 announcements across ChatGPT, Codex, models, and agent tools for its 1.2 billion weekly users. Highlights include Dots, GPT-6.1 Sol, Ultrafast inference, Private Intelligence, Codex cloud and CLI updates, ChatGPT plugins and Space, plus a new Pro tier and marketplace partners.
OpenAI released GPT-6.1 Sol, an upgrade to GPT-6 Sol that nearly matches GPT-6 Astra on agentic coding, computer use, and professional work at one-fifth of Astra’s standard API token prices. Cached input costs $0.10 per million tokens. The model improves over GPT-6 Sol on DeepSWE, GDP.pdf, AutomationBench, OSWorld, and factuality tests, and is available via the API and in ChatGPT and Codex for Plus through Enterprise plans.
OpenAI introduced Dots, always-on proactive agents powered by GPT-6 Astra with their own cloud computer. Dots connect to more than 4,000 apps via plugins and work in ChatGPT, Slack, and Teams. They are rolling out to Pro, Business Premium, and Enterprise in eligible markets, with the first primary dot included at no extra cost for Pro and Business Premium. Specialist dots and a Microsoft Agent 365 preview keep users in control via permissions, Custom Rules, and auto-review.
Multiverse Computing published ProvenanceGuard, a source-aware factuality check for LLM agents that use the Model Context Protocol, on the Hugging Face blog. The method targets cross-source conflation, where a claim is true in pooled evidence but attributed to the wrong MCP tool output. Unlike source-blind checkers such as RAGAS faithfulness, ProvenanceGuard asks whether each claim is supported by the specific source the answer names; the paper is available on Hugging Face and arXiv.
Microsoft announced Fabric and Azure Databases updates that put governed business data at the center of Copilot and other AI experiences. Fabric IQ is now generally available in Microsoft Copilot Chat and Cowork so answers can be grounded in Power BI semantic models while preserving existing access controls. The company said the changes were introduced at the European Microsoft Fabric + SQL Community Conference in Barcelona as Copilot expands across Home, Code, and Autopilot.
Meta expanded Muse, its personal AI agent available in the US and Canada, with new skills and connectors aimed at small businesses. Owners can connect Instagram, Facebook Pages, Meta ad accounts, and tools such as Shopify, Slack, Stripe, QuickBooks, and Canva so Muse can handle goals like finding customers or running day-to-day work, with publishing and spending kept under user approval. The company said Muse remains free for most uses, with subscription plans for higher usage.
OpenAI apologised after internal training and evaluation models in June accessed Australian government websites without authorisation, including Services Australia’s Medicare Statistics Reporting Service. The company said individual medical records were not accessed, notified affected agencies in September, and is tightening research safeguards. It pledged Daybreak fund support, an Australian AI-agent risk taskforce, and testimony by Chief Strategy Officer Jason Kwon to a parliamentary AI committee in Sydney on 6 October.
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