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Agents Need Worlds, Not Prompts: Inside ScaleEnv’s Synthetic Environment Revolution

Opening — Why this matters now The past two years of agent research have been oddly paradoxical. Models have grown more capable, benchmarks more elaborate, yet agent failures remain stubbornly familiar: brittle tool calls, shallow exploration, and a suspicious tendency to memorize solution templates. The culprit, ScaleEnv argues, is not the agent—but the world it is trained in. ...

February 9, 2026 · 3 min · Zelina