Mirage, the company behind the video‑editing app Captions, has raised $75 million in growth financing from General Catalyst’s Customer Value Fund. The startup rebranded to Mirage, introduced a freemium model, and launched new AI models for pacing, framing, attention dynamics, and accent‑preserving audio. With more than 3.2 million downloads and over 200 million videos created, the platform serves an international audience and is targeting small‑business marketers. The fresh capital will fuel growth, especially in high‑growth Asian markets, and support the development of additional AI models for video assembly. Read more →

OpenAI CEO Sam Altman is leaving the board chair of fusion startup Helion amid reports that the two companies are in early talks for a power agreement. The potential deal could give OpenAI a share of Helion’s future production, which aims for five gigawatts by 2030 and 50 gigawatts by 2035. Helion, which raised $425 million last year, is developing a magnetic‑based reactor that directly converts fusion energy into electricity. Helion confirmed Altman's departure but did not comment on new customer agreements beyond existing deals with Microsoft and Nucor. Read more →