ChatGPT-4o (March 2025) vs Claude Opus 4
Compare ChatGPT-4o (March 2025) by OpenAI against Claude Opus 4 by Anthropic, in 6 community votes, claude opus 4 wins 75% of head-to-head duels, context windows of 128K vs 200K, tested across 32 shared challenges. Updated May 2026.
Which is better, ChatGPT-4o (March 2025) or Claude Opus 4?
Claude Opus 4 is the better choice overall, winning 75% of 6 blind community votes on Rival. ChatGPT-4o (March 2025) costs $5/M input tokens vs $15/M for Claude Opus 4. Context windows: 128K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between ChatGPT-4o (March 2025) and Claude Opus 4
ChatGPT-4o (March 2025) is made by openai while Claude Opus 4 is from anthropic. ChatGPT-4o (March 2025) has a 128K token context window compared to Claude Opus 4's 200K. On pricing, ChatGPT-4o (March 2025) costs $5/M input tokens vs $15/M for Claude Opus 4. In community voting, In 6 community votes, Claude Opus 4 wins 75% of head-to-head duels.
In 6 community votes, Claude Opus 4 wins 75% of head-to-head duels. Based on blind community voting from the Rival open dataset of 6+ human preference judgments for this pair.
Per 1M tokens
ChatGPT-4o (March 2025) is cheaper on both — 3.0× input, 5.0× output
Pick Claude Opus 4. In 6 blind votes, Claude Opus 4 wins 75% of the time. That's not luck.
ChatGPT-4o (March 2025) is 5.0x cheaper per token — worth considering if cost matters.
Style Comparison
ChatGPT-4o (March 2025) uses 8.4x more emoji
