OpenAI DevDay Adds GPT-6.1 Sol, Computer-Using Agents and Cloud Codex

OpenAI announced GPT-6.1 Sol, computer use for the Agents API, cloud-based Codex environments, a Decisions API, and expanded ChatGPT plugin capabilities at DevDay 2026. [1] The Agents API can operate software through graphical interfaces and includes Codex multi-agent capabilities, tool search, tool calling, and context compaction, with OpenAI managing execution infrastructure. [1] Computer use is available through the API and in Codex and ChatGPT Work for selected plans. [1]

OpenAI says GPT-6.1 Sol approaches GPT-6 Astra on several evaluations while costing one-fifth of Astra's standard input and output token prices; cached input costs $0.10 per million tokens. [1] Codex now supports cloud environments and adds voice input, multi-task delegation, code review for GitHub and GitLab, and repository scanning through Codex Security Cloud. [1]

The limited-preview Decisions API uses Luna to choose predefined answers from text or image context, while plugins gain new interfaces and event responses through the proposed MCP Events specification. [1] Dots is positioned against Meta's Muse, but initially requires paid ChatGPT Pro, Business Premium, or Enterprise access, whereas Muse is free. [3]

OpenAI is bundling model economics, agent execution, cloud coding and plugin automation into one developer stack. GPT-6.1 Sol’s claimed proximity to Astra at one-fifth the token price makes cost-performance the clearest model proposition, while managed computer use reduces infrastructure developers must run themselves. Dots faces a different test: Meta’s Muse is free, whereas OpenAI is initially limiting Dots to paid tiers. The breadth is notable, but several pieces remain selected-plan or limited-preview offerings. What the sources don't address: how reliably these agent features perform in production or when broader access will arrive.