DeepSeek V3.1 vs GPT-5.1-Codex-Mini
Compare DeepSeek V3.1 by DeepSeek against GPT-5.1-Codex-Mini by OpenAI, context windows of 164K vs 400K, tested across 54 shared challenges. Updated April 2026.
Which is better, DeepSeek V3.1 or GPT-5.1-Codex-Mini?
DeepSeek V3.1 and GPT-5.1-Codex-Mini are both competitive models. DeepSeek V3.1 costs $0.2/M input tokens vs $1.5/M for GPT-5.1-Codex-Mini. Context windows: 164K vs 400K tokens. Compare their real outputs side by side below.
Key Differences Between DeepSeek V3.1 and GPT-5.1-Codex-Mini
DeepSeek V3.1 is made by deepseek while GPT-5.1-Codex-Mini is from openai. DeepSeek V3.1 has a 164K token context window compared to GPT-5.1-Codex-Mini's 400K. On pricing, DeepSeek V3.1 costs $0.2/M input tokens vs $1.5/M for GPT-5.1-Codex-Mini.
No community votes yet. On paper, GPT-5.1-Codex-Mini has the edge — newer, bigger context window.
DeepSeek V3.1 is 7.5x cheaper per token — worth considering if cost matters.
Style Comparison
DeepSeek V3.1 uses 2.4x more emoji
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
