OpenAI Codex Mini vs GPT-5.4 Mini
Compare OpenAI Codex Mini and GPT-5.4 Mini, both from OpenAI, context windows of 200K vs 400K, tested across 10 shared challenges. Updated April 2026.
Which is better, OpenAI Codex Mini or GPT-5.4 Mini?
OpenAI Codex Mini and GPT-5.4 Mini are both competitive models. OpenAI Codex Mini costs $1.5/M input tokens vs $0.75/M for GPT-5.4 Mini. Context windows: 200K vs 400K tokens. Compare their real outputs side by side below.
Key Differences Between OpenAI Codex Mini and GPT-5.4 Mini
OpenAI Codex Mini is made by openai while GPT-5.4 Mini is from openai. OpenAI Codex Mini has a 200K token context window compared to GPT-5.4 Mini's 400K. On pricing, OpenAI Codex Mini costs $1.5/M input tokens vs $0.75/M for GPT-5.4 Mini.
No community votes yet. On paper, GPT-5.4 Mini has the edge — newer, bigger context window.
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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.
