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GLM-4.5 vs GPT-4o
Comprehensive side-by-side LLM comparison
GLM-4.5 leads with 27.5% higher average benchmark score. GLM-4.5 offers 117.8K more tokens in context window than GPT-4o. GLM-4.5 is $10.50 cheaper per million tokens. GPT-4o supports multimodal inputs. Overall, GLM-4.5 is the stronger choice for coding tasks.
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Zhipu AI
GLM-4.5 was developed by Zhipu AI as an advanced bilingual language model, designed to excel at both Chinese and English language tasks. Built to serve diverse applications across multiple languages, it represents Zhipu AI's commitment to multilingual AI capabilities.
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OpenAI
This updated version of GPT-4o was released with refinements to its multimodal capabilities and improved performance across text, vision, and audio tasks. Built to incorporate learnings from the initial GPT-4o deployment, it enhanced reliability and accuracy while maintaining the seamless cross-modal reasoning that defines the GPT-4o family.
11 months newer
GPT-4o
OpenAI
2024-08-06
GLM-4.5
Zhipu AI
2025-07-28
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Pricing Comparison
Cost per million tokens (USD)
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GLM-4.5
Input:$0.40
Output:$1.60($10.50 cheaper)
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GPT-4o
Input:$2.50
Output:$10.00
Performance Metrics
Context window and performance specifications
Average performance across 6 common benchmarks
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GLM-4.5
Average Score:76.5%(+27.5%)
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GPT-4o
Average Score:49.0%
Performance comparison across key benchmark categories
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GLM-4.5
Coding64.2%(+31.0%)
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GPT-4o
Coding33.2%
Provider Availability & Performance
Available providers and their performance metrics
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GLM-4.5
3 providers
DeepInfra
Novita
ZeroEval
Throughput: 85 tok/s
Latency: 0.7ms
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GPT-4o
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GLM-4.5
Avg Score:76.5%(+27.5%)
Providers:3
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GPT-4o
Avg Score:49.0%
Providers:2