GLM-4.5
GLM-5.1
Decision Recommendation
⚖️ Editorial Verdict: In our analysis, GLM-5.1 is the premium intelligence choice, scoring 58.4% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: GLM-4.5 is 1.5x cheaper to run. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, GLM-4.5 offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of GLM-5.1 fully justifies the cost.
GLM-4.5
Benchmarks & Scores
Cost & Performance
GLM-5.1
Benchmarks & Scores
Cost & Performance
Frequently Asked Questions
GLM-4.5 is cheaper than GLM-5.1. GLM-4.5 has a blended cost of $1.00/1M tokens, which is about 1.5x cheaper than GLM-5.1 at $1.50/1M tokens.
Speed metrics are currently unavailable for both models.
GLM-5.1 is better for coding tasks. It scores 58.4% on coding evaluations (swe-bench-pro) compared to GLM-4.5 which scores N/A.
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