Comprehensive side-by-side LLM comparison
. 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-5.3 Codex, released by OpenAI in February 2026, is a coding-specialized large language model from the GPT-5.3 family. It targets software engineering workflows including automated code generation, test writing, and agentic multi-file editing, built on the incremental improvements of the GPT-5.3 generation.
2 months newer

DeepSeek-V3.2
DeepSeek
2025-12-01

GPT-5.3 Codex
OpenAI
2026-02
Context window and performance specifications
Available providers and their performance metrics
DeepSeek-V3.2
DeepSeek
GPT-5.3 Codex
DeepSeek-V3.2
GPT-5.3 Codex
DeepSeek-V3.2
GPT-5.3 Codex