Runway Gen-4.5 is rolling out, and the text-to-video model grabbed the No. 1 spot on the Video Arena leaderboard for generative models that don’t simultaneously output sound, beating the non-audio versions of Google’s Veo 3 and OpenAI’s Sora 2 Pro. Offering what Runway AI calls “unprecedented visual fidelity” across cinematic and “highly realistic” outputs, it is also built for creative freedom, providing “precise control over every aspect of generation.” The new model is good at understanding physics, cause and effect through casual reasoning, camera movements and human emotion, claims the New York-based startup. Continue reading Runway Gen-4.5 Video Debuts at No. 1 on Video Arena Chart

Elon Musk’s xAI has made Grok 4 available on its free tiers as it seeks to take advantage of initial user dissatisfaction with OpenAI’s new GPT-5. The company has positioned Grok as freewheeling and uncensored, a contrast to GPT-5, which has been criticized on Reddit and other social platforms as a “corporate beige zombie” with too many guardrails. After its February debut, Grok 3 was reined-in with checks including removal of its native image generator in March. Grok 4 was released in July with integrated image and video features as well as a “Spicy” mode for creating risqué content. Continue reading Grok 4 Offered Free in xAI Move on ChatGPT-5 Market Share