Comprehensive side-by-side LLM comparison
GPT-5.1 Codex Max leads with 11.0% higher average benchmark score. Overall, GPT-5.1 Codex Max is the stronger choice for coding tasks.
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 Codex Max, released by OpenAI in November 2025, is an enhanced coding variant from the GPT-5.1 Codex line, designed for more complex software engineering tasks requiring additional reasoning depth. It targets large-scale code generation, automated refactoring, and sophisticated agentic development workflows.
1 month newer

GPT-5.1 Codex Max
OpenAI
2025-11

DeepSeek-V3.2
DeepSeek
2025-12-01
Context window and performance specifications
Average performance across 1 common benchmarks
DeepSeek-V3.2
GPT-5.1 Codex Max
Performance comparison across key benchmark categories
DeepSeek-V3.2
GPT-5.1 Codex Max
Available providers and their performance metrics
DeepSeek-V3.2
DeepSeek
GPT-5.1 Codex Max
DeepSeek-V3.2
GPT-5.1 Codex Max
DeepSeek-V3.2
GPT-5.1 Codex Max