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GPT-5.2 vs Seed-1.8
Comprehensive side-by-side LLM comparison
Seed-1.8 leads with 23.7% higher average benchmark score. Overall, Seed-1.8 is the stronger choice for coding tasks.
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OpenAI
GPT-5.2, released by OpenAI on December 11, 2025, is a large language model from the GPT-5 family that improves on GPT-5 in general intelligence, long-context understanding, agentic tool-calling, and vision. It features a 400K token context window, 128K maximum output tokens, and a knowledge cutoff of August 2025. GPT-5.2 targets long-context coding tasks, extended document analysis, and complex agentic workflows requiring reliable instruction following.
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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.
7 days newer
GPT-5.2
OpenAI
2025-12-11
Seed-1.8
ByteDance
2025-12-18
Average performance across 1 common benchmarks
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GPT-5.2
Average Score:38.2%
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Seed-1.8
Average Score:61.9%(+23.7%)
Performance comparison across key benchmark categories
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GPT-5.2
Agents38.2%
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Seed-1.8
Agents61.9%(+23.7%)
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Knowledge Cutoff
Training data recency comparison
GPT-5.2
2025-08
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5.2
0 providers
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Seed-1.8
0 providers
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GPT-5.2
Avg Score:38.2%
Providers:0
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Seed-1.8
Avg Score:61.9%(+23.7%)
Providers:0