The daily briefing for AI marketers, growth hackers, and operators.

TL;DR — TLDR AI reveals that OpenAI is developing an always-on agent platform within ChatGPT, codenamed Hermes. Tool: This platform allows users to create and continuously run custom agents. Tactic: Leverage these agents to automate customer interactions and streamline marketing workflows.

TL;DR — OpenAI shipped GPT-5.5 on April 23, six weeks after GPT-5.4, with upgrades for data analysis, spreadsheets, and agentic task completion. OpenAI's own go-to-market team reports one staffer saved 5-10 hours per week after moving weekly business reports to Codex, and 85% of the company now uses Codex across functions including marketing. GPT-5.5 is live for Plus, Pro, Business, and Enterprise users; GPT-5.5 Pro ships to Pro, Business, and Enterprise. Tactical implication: hand GPT-5.5 one recurring reporting workflow this week, time the before and after, and standardize the prompt if you save 3+ hours.

TL;DR — OpenAI has begun serving ChatGPT ads inline to signed-out users, expanding inventory beyond the original Free and Go logged-in audience. The minimum buy-in for pilot advertisers is now around $50,000, down from $200,000, though pilot spend has been capped by low frequency. Ads appear inside chat responses, not as banners. Tactical implication: pilot advertisers should re-pace budgets now that inventory is growing; non-pilot brands should audit product feeds and FAQ pages that answer-engine ads are likely to cite.

TL;DR — Google Ads added view-through conversion (VTC) optimization to Demand Gen campaigns, letting buyers bid directly toward YouTube view-through conversions instead of clicks. Google also extended its Commerce Media Suite to Demand Gen inventory, so retailers can target high-intent shoppers across YouTube, Discover, and Gmail using first-party catalog and conversion data. Tactical implication: switch video-heavy Demand Gen campaigns to VTC optimization this week and upload your product feed to Commerce Media Suite before the next retail push.

TL;DR — Anthropic moved Claude Cowork to general availability on April 23 across macOS and Windows for all paid plans (Pro, Team, Enterprise). The GA release adds role-based access controls, group spend limits, usage analytics via an Analytics API, expanded OpenTelemetry support, and a Zoom MCP connector; Anthropic reports early adoption from marketing, finance, legal, and ops teams, not just engineering. Tactical implication: if your team already has Claude seats, run a 2-week Cowork pilot on two workflows (brief drafting, campaign QA) and use the Analytics API to prove usage before expanding seats.

TL;DR — PayPal launched a platform that turns PayPal transaction data into targetable audience segments across Warner Bros. Discovery, Tubi, and Spectrum Reach, letting buyers tie streaming ad exposure to purchases. Separately, Unity's gaming audiences are available outside the Unity platform for the first time, with Index Exchange curating Unity-informed web and CTV inventory. Tactical implication: CTV buyers should test PayPal segments against their current audience stack and ask their DSP about Unity curation before committing upfront dollars.

TL;DR — Salesforce discusses new challenges in email marketing and strategies to overcome them. Trend: Increasing email volumes demand more personalized content. Play: Use AI to segment audiences and tailor email content for higher engagement rates.

TL;DR — Microsoft introduced AI Max for Search campaigns and updated 3 core areas—measurement, commerce, and media—to track how brands appear in AI-generated answers. The platform updates shift focus from traditional clicks to securing citations within conversational interfaces. Tactical implication: Audit 10-15 of your top products using the Universal Commerce Protocol in Merchant Center to ensure AI agent discoverability.