Personal Productivity & AI-Augmented WorkLenny's Newsletter

GLM 5.2: why I’m replacing Opus in Claude Code with this new model

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“Total cost: $3.36 for roughly 6 million tokens, a prioritized bug-fix dashboard I'm actually shipping from, and a landing page redesign that matched the design system on the first try”

Key takeaways

  • Open-weight models like GLM 5.2 can replace premium models (Claude Opus) at 1-2% of the cost ($3.36 for 6M tokens vs ~$300+ for Opus)
  • GLM 5.2 successfully handled production tasks: codebase architecture audit, UI redesign matching existing design system, and 45-minute autonomous bug hunting from real logs
  • Open-weight models provide vendor independence and cost predictability for AI coding workflows, challenging the assumption that frontier models are necessary for production coding tasks

Why this matters for operators: Companies evaluating AI coding tools and managing AI infrastructure costs

I cover AI×GTM intelligence like this every Wednesday.

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This analysis was produced using the STEEPWORKS system — the same agents, skills, and knowledge architecture available in the GrowthOS package.