GPT-5.4 Nano vs Claude Sonnet 4

Compare GPT-5.4 Nano by OpenAI against Claude Sonnet 4 by Anthropic, context windows of 400K vs 200K, tested across 33 shared challenges. Updated March 2026.

Which is better, GPT-5.4 Nano or Claude Sonnet 4?

GPT-5.4 Nano and Claude Sonnet 4 are both competitive models. GPT-5.4 Nano costs $0.2/M input tokens vs $3/M for Claude Sonnet 4. Context windows: 400K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-5.4 Nano and Claude Sonnet 4

GPT-5.4 Nano is made by openai while Claude Sonnet 4 is from anthropic. GPT-5.4 Nano has a 400K token context window compared to Claude Sonnet 4's 200K. On pricing, GPT-5.4 Nano costs $0.2/M input tokens vs $3/M for Claude Sonnet 4.

Our Verdict
GPT-5.4 Nano
GPT-5.4 Nano
Claude Sonnet 4
Claude Sonnet 4

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 Nano is 12x cheaper per token — worth considering if cost matters.

Too close to call
FAQ

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