Updated May 1
Sep 30, 2026
ChatGPT plugins can now react to MCP events, with signed webhooks and clear limits
OpenAI's DevDay MCP Events launch lets a plugin start a ChatGPT workflow when its server reports a relevant change. The current integration uses verified, signed webhooks and leaves several mechanisms in the broader draft specification unsupported.
OpenAIChatGPTMCP
Sep 30, 2026
ChatGPT Sites can host plugins, but each visitor uses their own connection
OpenAI’s DevDay update brings supported plugins into Sites for workspaces. Builders still need to account for admin controls, visitor consent and limits on background access.
OpenAIChatGPTSites
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Anthropic’s nine influence cases show distribution is not persuasion
A case-by-case reading of Anthropic’s September threat report separates AI-generated output, verified audience reach and evidence of real-world effects.
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Claude Sonnet 5.5 halves cache-read prices. Migration can still change your bill
Input and output token prices match Sonnet 5, while cache reads now cost half as much. Effort defaults, thinking behavior and unsupported API settings still make migration more consequential than a model-ID swap.
AnthropicClaude Sonnet 5.5Claude API
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ChatGPT Space replaces Library for eligible users, while Projects stay separate
OpenAI's DevDay launch gives teams a shared home for pages and files. The current help guide draws important lines around Projects, mobile editing, inherited access and automatic page updates.
OpenAIChatGPTSpace