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Claude Opus 4.1 vs GLM-4.5 Air
Comprehensive side-by-side LLM comparison
Claude Opus 4.1 leads with 6.9% higher average benchmark score. Claude Opus 4.1 offers 99.9K more tokens in context window than GLM-4.5 Air. GLM-4.5 Air is $89.90 cheaper per million tokens. Claude Opus 4.1 supports multimodal inputs. Claude Opus 4.1 is available on 3 providers. Overall, Claude Opus 4.1 is the stronger choice for coding tasks.
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Anthropic
Claude Opus 4.1, released by Anthropic in August 2025, is a large language model from the Claude 4 family optimized for demanding reasoning, multi-step coding, and extended analysis tasks. It features a 200K token context window, 32K maximum output tokens, native image understanding, and extended thinking capabilities. Opus 4.1 targets complex problem-solving, multi-turn reasoning workflows, and applications requiring deep analysis with integrated tool use.
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Zhipu AI
GLM-4.5 Air is a lightweight variant from Zhipu AI's GLM-4 model family, designed for efficient deployments requiring lower inference cost while maintaining strong language understanding and generation capabilities. It targets cost-sensitive production workloads, API integrations, and applications where the full GLM-4.x series capacity exceeds requirements.
8 days newer
GLM-4.5 Air
Zhipu AI
2025-07-28
Claude Opus 4.1
Anthropic
2025-08-05
Pricing Comparison
Cost per million tokens (USD)
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Claude Opus 4.1
Input:$15.00
Output:$75.00
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GLM-4.5 Air
Input:$0.05
Output:$0.05($89.90 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Claude Opus 4.1
Average Score:40.9%(+6.9%)
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GLM-4.5 Air
Average Score:34.0%
Performance comparison across key benchmark categories
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Claude Opus 4.1
Tool Use40.9%(+6.9%)
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GLM-4.5 Air
Tool Use34.0%
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Knowledge Cutoff
Training data recency comparison
Claude Opus 4.1
2025-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Claude Opus 4.1
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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GLM-4.5 Air
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Claude Opus 4.1
Avg Score:40.9%(+6.9%)
Providers:3
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GLM-4.5 Air
Avg Score:34.0%
Providers:1