Summary
On August 13, 2026 Vercel announced that GLM 5.2, Z.ai's open-weights coding model with a 1M-token context window, is free for eve agents through August 27, served by Blackbox AI on Vercel AI Gateway. New eve agents default to GLM 5.2; the offer excludes Fast mode and the glm-5.2-fast variant.
What changed
Vercel AI Gateway began offering GLM 5.2 at no cost for eve agents through August 27, 2026, with Blackbox AI as the serving provider and GLM 5.2 set as the default model for new eve agents. After the promo, GLM 5.2 remains on AI Gateway at standard provider rates; the offer does not cover Fast mode or glm-5.2-fast.
Why it matters
Zero-cost access to a 1M-context open-weights coding model lowers the barrier to running long-horizon coding agents and steers developers onto Vercel's AI Gateway as the routing and billing layer. Time-boxed free model access is becoming a distribution tactic to seed agent workflows on a specific gateway.
Evidence excerpt
GLM 5.2, the open-weights coding model from Z.ai with a 1M-token context window, is free for eve agents through August 27. New eve agents come with GLM 5.2 as their default model.