GPT-4o (Omni) vs Claude 2

Compare GPT-4o (Omni) by OpenAI against Claude 2 by Anthropic, context windows of 128K vs 100K, tested across 5 shared challenges. Updated March 2026.

Which is better, GPT-4o (Omni) or Claude 2?

GPT-4o (Omni) and Claude 2 are both competitive models. GPT-4o (Omni) costs $2.5/M input tokens vs $11.02/M for Claude 2. Context windows: 128K vs 100K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-4o (Omni) and Claude 2

GPT-4o (Omni) is made by openai while Claude 2 is from anthropic. GPT-4o (Omni) has a 128K token context window compared to Claude 2's 100K. On pricing, GPT-4o (Omni) costs $2.5/M input tokens vs $11.02/M for Claude 2.

Our Verdict
GPT-4o (Omni)
GPT-4o (Omni)
Claude 2
Claude 2Runner-up

No community votes yet. On paper, GPT-4o (Omni) has the edge — bigger model tier, newer.

GPT-4o (Omni) is 3.3x cheaper per token — worth considering if cost matters.

Too close to call
FAQ

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