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GPT-5.1 vs GPT-5.4 Mini

Compare GPT-5.1 and GPT-5.4 Mini, both from OpenAI, context windows of 400K vs 400K, tested across 51 shared challenges. Updated March 2026.

Which is better, GPT-5.1 or GPT-5.4 Mini?

GPT-5.1 and GPT-5.4 Mini are both competitive models. GPT-5.1 costs $1.25/M input tokens vs $0.75/M for GPT-5.4 Mini. Context windows: 400K vs 400K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-5.1 and GPT-5.4 Mini

GPT-5.1 is made by openai while GPT-5.4 Mini is from openai. GPT-5.1 has a 400K token context window compared to GPT-5.4 Mini's 400K. On pricing, GPT-5.1 costs $1.25/M input tokens vs $0.75/M for GPT-5.4 Mini.

Our Verdict
GPT-5.1
GPT-5.1
GPT-5.4 Mini
GPT-5.4 Mini

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call
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