Introducing GLM-5.3: Built to Code. Ready for Cyber Defense. - Top-tier coding and agentic capabilities, achieved through post-training on the 743B base model - A major leap in cybersecurity, setting a new standard among open models Tech Blog: https://t.co/ekQkO83jCv https://t…
z.ai
AI Weekly's analysis
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- GLM-5.3 launched on August 14, 2026, keeping GLM-5.2's base and lifting Terminal-Bench 3.0 from 4.6 to 28.3 through post-training alone.
- On CyberGym vulnerability discovery, GLM-5.3 scored 84.5%, slightly ahead of Claude Mythos 5 at 83.8% and GPT-5.6 Sol at 83.6%.
- Z.ai says the model surfaced 2,436 vulnerabilities across 269 open-source projects, 1,097 rated critical or high, and delayed weights about two weeks.
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GLM-5.3 is available now through GLM Coding Plan and ZCode. API access and open weights will be released in stages following rigorous safety evaluations. GLM Coding Plan: https://t.co/002j3FkZkZ ZCode: https://t.co/lOy3IRTGqJ
ZCode - Simple, Fast, Vibe‑Ready | Official Harness for GLM-5.2 zcode.z.ai
AI Weekly's analysis
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- ZCode is pitched on Z.ai's site as the 'Official Harness for GLM-5.2,' now on version 3.2.2 across macOS, Windows and Linux (Beta).
- GLM Coding Plans start at $16.20/month for Lite, $64.80 for Pro at 5x Lite usage, and $144 for Max at 20x usage.
- The harness leans on long-running Goals, multi-agent collaboration, and remote bot control from WeChat, Feishu and Telegram.
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GLM-5.3 is available now through GLM Coding Plan and ZCode. API access and open weights will be released in stages following rigorous safety evaluations. GLM Coding Plan: https://t.co/002j3FkZkZ ZCode: https://t.co/lOy3IRTGqJ
GLM Coding Plan — AI Coding Powered by GLM-5.2 & GLM-5-Turbo for Agents & IDEs z.ai
AI Weekly's analysis
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- Z.ai released GLM-5.2 under the MIT license on June 16, 2026, scoring 62.1 on SWE-bench Pro versus GPT-5.5's 58.6.
- The model extends context from roughly 200,000 to 1,000,000 tokens, targeting long-running coding agent sessions.
- GLM Coding Plan subscriptions run from roughly $3 to $6 per month at the Lite tier, with Claude Code, Cursor, Cline, and Kilo Code integrations included.
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GLM-5.3 API is now live. - Built for coding, defensive cybersecurity, and long-horizon agentic tasks - Priced the same as GLM-5.2 - Available via the official API and partner model gateways Get started: https://t.co/3Dpy1tOdaM https://t.co/yBzgPwTFxL
GLM-5.3 - Overview - Z.AI DEVELOPER DOCUMENT docs.z.ai
