Z.AI's open-weights GLM-5.2 edges out GPT-5.5 on coding benchmarks like FrontierSWE at one-sixth the cost, with 1M token context and MIT license.

Z.ai released GLM-5.2 with a usable 1-million-token context window across all GLM Coding Plan tiers; MIT weights pending.

It allows engineering teams to host frontier-level AI on their own sovereign infrastructure, entirely eliminating vendor lock-in.