Comprehensive side-by-side LLM comparison
GPT-5.1 supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
DeepSeek
DeepSeek-V3.2, released by DeepSeek on December 1, 2025, is a large language model with 685 billion total parameters featuring integrated thinking in tool-use and support for both reasoning and direct generation modes. It features a 128K token context window and introduced large-scale agent training across 1,800+ environments. DeepSeek-V3.2 targets agentic workflows, complex instruction following, and coding tasks under an open MIT license.
OpenAI
GPT-5.1, released by OpenAI in November 2025, is a large language model from the GPT-5 family that delivers incremental improvements in reasoning, instruction following, and multimodal understanding over GPT-5. It features a 400K token context window and targets general-purpose development, long-context analysis, and agentic workflows.
1 month newer

GPT-5.1
OpenAI
2025-11

DeepSeek-V3.2
DeepSeek
2025-12-01
Context window and performance specifications
Available providers and their performance metrics
DeepSeek-V3.2
DeepSeek
GPT-5.1
DeepSeek-V3.2
GPT-5.1
DeepSeek-V3.2
GPT-5.1