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GLM-4.5 Air vs Grok 4.1 Fast
Comprehensive side-by-side LLM comparison
Grok 4.1 Fast offers 1.9M more tokens in context window than GLM-4.5 Air. GLM-4.5 Air is $5.90 cheaper per million tokens. Grok 4.1 Fast supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
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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.
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xAI
Grok 4.1 Fast, released by xAI in November 2025, is a fast-response variant from the Grok 4 family featuring a 2M token context window designed for high-throughput applications. It omits thinking tokens for immediate responses, reducing latency while maintaining strong output quality. Grok 4.1 Fast targets production APIs, real-time assistants, and cost-sensitive applications requiring long-context understanding at high volume.
3 months newer
GLM-4.5 Air
Zhipu AI
2025-07-28
Grok 4.1 Fast
xAI
2025-11-17
Pricing Comparison
Cost per million tokens (USD)
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GLM-4.5 Air
Input:$0.05
Output:$0.05($5.90 cheaper)
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Grok 4.1 Fast
Input:$1.00
Output:$5.00
Performance Metrics
Context window and performance specifications
Provider Availability & Performance
Available providers and their performance metrics
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GLM-4.5 Air
1 providers
Zhipu AI
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Grok 4.1 Fast
1 providers
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GLM-4.5 Air
Avg Score:0.0%
Providers:1
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Grok 4.1 Fast
Avg Score:0.0%
Providers:1