Claude Opus 4 vs GPT-5.4 Mini

Compare Claude Opus 4 by Anthropic against GPT-5.4 Mini by OpenAI, context windows of 200K vs 400K, tested across 35 shared challenges. Updated March 2026.

Which is better, Claude Opus 4 or GPT-5.4 Mini?

Claude Opus 4 and GPT-5.4 Mini are both competitive models. Claude Opus 4 costs $15/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 Claude Opus 4 and GPT-5.4 Mini

Claude Opus 4 is made by anthropic while GPT-5.4 Mini is from openai. Claude Opus 4 has a 200K token context window compared to GPT-5.4 Mini's 400K. On pricing, Claude Opus 4 costs $15/M input tokens vs $0.75/M for GPT-5.4 Mini.

Our Verdict
Claude Opus 4
Claude Opus 4
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.

GPT-5.4 Mini is 17x cheaper per token — worth considering if cost matters.

Too close to call
FAQ

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