ChatGPT-4o (March 2025) vs Claude 3 Opus
Compare ChatGPT-4o (March 2025) by OpenAI against Claude 3 Opus by Anthropic, context windows of 128K vs 200K, tested across 7 shared challenges. Updated May 2026.
Which is better, ChatGPT-4o (March 2025) or Claude 3 Opus?
ChatGPT-4o (March 2025) and Claude 3 Opus are both competitive models. ChatGPT-4o (March 2025) costs $5/M input tokens vs $15/M for Claude 3 Opus. Context windows: 128K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between ChatGPT-4o (March 2025) and Claude 3 Opus
ChatGPT-4o (March 2025) is made by openai while Claude 3 Opus is from anthropic. ChatGPT-4o (March 2025) has a 128K token context window compared to Claude 3 Opus's 200K. On pricing, ChatGPT-4o (March 2025) costs $5/M input tokens vs $15/M for Claude 3 Opus.
Per 1M tokens
ChatGPT-4o (March 2025) is cheaper on both — 3.0× input, 5.0× output
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
ChatGPT-4o (March 2025) is 5.0x cheaper per token — worth considering if cost matters.
Style Comparison
ChatGPT-4o (March 2025) uses 329.7x more bold
