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Grok 4.1 Fast vs Seed-1.8
Comprehensive side-by-side LLM comparison
. Both models have their strengths depending on your specific coding needs.
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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.
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ByteDance
Seed-1.8, developed by ByteDance Seed, is a generalized agentic large language model supporting text and image input, with industry-leading GUI agent capabilities and improvements in multimodal reasoning over its predecessor Seed1.5-VL. It targets information retrieval, code generation, GUI interaction, and complex agentic workflows requiring robust multimodal understanding.
1 month newer
Grok 4.1 Fast
xAI
2025-11-17
Seed-1.8
ByteDance
2025-12-18
Performance Metrics
Context window and performance specifications
Provider Availability & Performance
Available providers and their performance metrics
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Grok 4.1 Fast
1 providers
xAI
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Seed-1.8
0 providers
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Grok 4.1 Fast
Avg Score:0.0%
Providers:1
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Seed-1.8
Avg Score:0.0%
Providers:0