Claude Opus 4.1 vs GPT-4o (Omni)

Compare Claude Opus 4.1 by Anthropic against GPT-4o (Omni) by OpenAI, context windows of 200K vs 128K, tested across 27 shared challenges. Updated March 2026.

Which is better, Claude Opus 4.1 or GPT-4o (Omni)?

Claude Opus 4.1 and GPT-4o (Omni) are both competitive models. Claude Opus 4.1 costs $15/M input tokens vs $2.5/M for GPT-4o (Omni). Context windows: 200K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between Claude Opus 4.1 and GPT-4o (Omni)

Claude Opus 4.1 is made by anthropic while GPT-4o (Omni) is from openai. Claude Opus 4.1 has a 200K token context window compared to GPT-4o (Omni)'s 128K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $2.5/M for GPT-4o (Omni).

Our Verdict
Claude Opus 4.1
Claude Opus 4.1
GPT-4o (Omni)
GPT-4o (Omni)Runner-up

No community votes yet. On paper, Claude Opus 4.1 has the edge — newer, bigger context window.

GPT-4o (Omni) is 7.5x cheaper per token — worth considering if cost matters.

Too close to call
vs

Ask them anything yourself

Claude Opus 4.1GPT-4o (Omni)
FAQ