This error looks like a model failure, but it behaves like a client problem. It shows up most when a tool tries to select Gemini 3.1 Pro and the local build cannot support that selection. That mismatch creates a frustrating experience because the interface suggests the model exists while execution fails immediately. The pattern is strongest inside Google Antigravity and the tools that integrate with it, rather than inside the consumer Gemini app. People hit it when they are t

Three “thinking” models can feel interchangeable for the first five minutes. They all write fast, they all explain cleanly, and they all sound confident in the same professional tone. The difference shows up when the task becomes a system, not a prompt. A system has state, constraints, tool outputs, and failure modes that compound over time. That is where “thinking” stops being a label and becomes an operating posture that either holds or collapses. This is also where teams s

Perplexity AI has rapidly evolved into a leading research and knowledge assistant, powered by cutting-edge large language models, with its user experience and access shaped by a distinct line between universally available free features and the more advanced capabilities reserved for paid subscribers. The functional divide is not simply about lifting usage caps or adding premium polish; it is fundamental to how Perplexity approaches research depth, data synthesis, answer trans