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Grok 4.1 Fast vs Seed 1.5-VL
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
Seed1.5-VL, released by ByteDance Seed on May 15, 2025, is a vision-language foundation model composed of a 532M-parameter vision encoder and a Mixture-of-Experts language model with 20 billion active parameters. It was pretrained on over 3 trillion multimodal tokens and achieved state-of-the-art performance on 38 out of 60 public VLM benchmarks at release. Seed1.5-VL targets complex visual reasoning, OCR, video comprehension, 3D spatial understanding, and multimodal agentic tasks.
6 months newer
Seed 1.5-VL
ByteDance
2025-05-15
Grok 4.1 Fast
xAI
2025-11-17
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 1.5-VL
0 providers
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Grok 4.1 Fast
Avg Score:0.0%
Providers:1
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Seed 1.5-VL
Avg Score:0.0%
Providers:0