Hark previews Handoff, its browser agent for real websites

Brett Adcock's Hark previewed an agent called Handoff that clicks around real websites the way a person does, without official APIs on the other side. TechCrunch reports the agent works on services like Target, Walmart, OpenTable and LinkedIn, analyzing page structure and visual data to decide whether to click a button or type text. The pitch is that the underlying model predicts the next action rather than the next token.

In the demo Adcock ran for TechCrunch, Handoff built a custom flower bouquet from a vague brief that included 'some of the florist's choice.' The company says Handoff is faster and costs significantly less than GPT 5.5 and Opus 4.8, without publishing head-to-head numbers in the preview itself. A parallel Hark press release claims a top score on the industry-standard OM2W benchmark and pricing at less than one-tenth the token price of competing models from Anthropic, OpenAI and Google, with tasks like ordering on DoorDash and Uber Eats and price-comparing flights on United, Delta and American offered as examples.

The context matters. Hark raised $700 million in Series A funding in May 2026 at a $6 billion post-money valuation, and Handoff is still running on a post-trained model, with proper pre-training pushed to later in 2026. That is an unusual sequencing choice, meaning today's demo reflects data pipeline and post-training work, not the full-scale training run Hark still intends to do.

The honest caveat is that everything here is Hark's own claim, and the TechCrunch preview does not include independent benchmarks or reproducible tests. What the reporting does not give you is the business question underneath: platforms like LinkedIn and OpenTable have a history of blocking automated agents, and a browser-first agent that mimics a human is exactly the kind of traffic large sites fight. The waitlist is open now, with launch targeted for end of summer 2026, which is when the claims meet real workloads and, likely, real countermeasures.