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.
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.
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
GPT-5.2
Seed-1.8
Performance comparison across key benchmark categories
GPT-5.2
Seed-1.8
GPT-5.2
2025-08
Available providers and their performance metrics
GPT-5.2
Seed-1.8
GPT-5.2
Seed-1.8