GLM 5.2 Review

Tested June 2026 · Independent assessment · Not sponsored by Zhipu AI

Very Good

Best value coding model in June 2026

Score Breakdown

Coding Quality9/10

Coding Plan feature is genuinely useful for multi-file projects

API Speed8/10

~85 tok/s is fast; occasional latency spikes via OpenRouter

Price / Value10/10

$0.28/M output — best value among top-tier coding models

Context Window8/10

128K is solid; Fable's 200K edge matters for very large codebases

Local / Open Source10/10

Only top coding model with full open weights on HuggingFace

Documentation7/10

Z.ai docs are decent but mostly in Chinese; English docs lagging

What We Tested

Multi-file React App

★★★★☆

Prompt: Build a React todo app with TypeScript, Zustand state management, and Tailwind CSS.

GLM 5.2 generated a Coding Plan with 6 files before writing any code. All imports were consistent. Minor: forgot to install zustand in package.json.

Bug Fix Task

★★★★★

Prompt: This Python async function has a race condition. Find and fix it. [200 lines of code]

Correctly identified the missing asyncio.Lock() around the shared state. Fix was clean and explained well.

Code Review

★★★★☆

Prompt: Review this Express.js API for security issues.

Found SQL injection risk, missing rate limiting, and insecure JWT config. Missed one CORS misconfiguration.

Algorithm Problem

★★★★★

Prompt: Implement a LRU cache in Python with O(1) get and put.

Correct OrderedDict-based solution on first try, with clear explanation.

Pros & Cons

Pros

✅ Coding Plan = fewer multi-file errors
✅ Extremely cheap API ($0.28/M output)
✅ Open weights — run locally for free
✅ Fast output speed (~85 tok/s)
✅ Available on OpenRouter, no lock-in

Cons

❌ Trails Claude Fable on complex reasoning
❌ English docs are incomplete
❌ 128K context (Fable has 200K)
❌ Occasional hallucinations on niche APIs
❌ Community / ecosystem smaller than OpenAI

Verdict

GLM 5.2 is the best coding model for developers who are cost-sensitive or want local deployment. For $0.28/M output tokens, you get ~92% of Claude Fable's coding ability. The Coding Plan feature makes it genuinely better than zero-shot models for complex projects. If you're running agentic workflows at scale, GLM 5.2 is the obvious choice.

Recommended for: Solo devs, startups, high-volume API users, local deployment enthusiasts.