OpenAI GPT-5.6 Terra VS Z.ai (Zhipu AI) GLM-4.6
Decision Recommendation
⚖️ Editorial Verdict: In our analysis, GPT-5.6 Terra is the premium intelligence choice, scoring 53.7% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: GLM-4.6 is 5.6x cheaper to run. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, GLM-4.6 offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of GPT-5.6 Terra fully justifies the cost.
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Model Specs
GPT-5.6 Terra
Benchmarks & Scores
Coding (swe-bench-pro)Winner (+53.7%)
63.4%excellent at multi-file repositories, autonomous agents, and industrial codebases
Reasoning (gpqa-diamond)Winner (+10.0%)
92.9%graduate-level science QA
Cost & Performance
Cost (per 1M tokens)
$5.63Input: $2.50 | Output: $15.00Context WindowLarger
1.05M tokensModel Specs
GLM-4.6
Benchmarks & Scores
Coding (swe-bench-pro)
9.67%excellent at multi-file repositories, autonomous agents, and industrial codebases
Reasoning (gpqa-diamond)
82.9%graduate-level science QA
Cost & Performance
Cost (per 1M tokens)5.6x cheaper
$1.00Input: $0.60 | Output: $2.20Context Window
204.8k tokensFrequently Asked Questions about GPT-5.6 Terra vs GLM-4.6 comparison
GLM-4.6 is cheaper than GPT-5.6 Terra. GLM-4.6 has a blended cost of $1.00/1M tokens, which is about 5.6x cheaper than GPT-5.6 Terra at $5.63/1M tokens.
GPT-5.6 Terra is better for coding tasks on this benchmark. It scores 63.4% on swe-bench-pro (excellent at multi-file repositories, autonomous agents, and industrial codebases) compared to GLM-4.6 which scores 9.67%.
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