GPT-4.1 Mini vs GPT-5.1-Codex-Mini
Compare GPT-4.1 Mini and GPT-5.1-Codex-Mini, both from OpenAI, context windows of 1.0M vs 400K, tested across 54 shared challenges. Updated April 2026.
Which is better, GPT-4.1 Mini or GPT-5.1-Codex-Mini?
GPT-4.1 Mini and GPT-5.1-Codex-Mini are both competitive models. GPT-4.1 Mini costs $0.4/M input tokens vs $1.5/M for GPT-5.1-Codex-Mini. Context windows: 1048K vs 400K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4.1 Mini and GPT-5.1-Codex-Mini
GPT-4.1 Mini is made by openai while GPT-5.1-Codex-Mini is from openai. GPT-4.1 Mini has a 1048K token context window compared to GPT-5.1-Codex-Mini's 400K. On pricing, GPT-4.1 Mini costs $0.4/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 — bigger model tier, newer.
GPT-4.1 Mini is 3.8x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-4.1 Mini uses 9.8x more headings
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.
