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Comparison of OpenAI ChatGPT 5.5 and Claude Opus 4.7

OpenAI ChatGPT 5.5 is slightly better than Claude Opus 4.7 in Medium mode.

Well, by the way, OpenAI ChatGPT 5.5 (Medium mode) is slightly better than Claude Opus 4.7 (in Medium mode). So switching to ChatGPT 5.5 makes sense only for the high and xhigh modes on complex tasks. I'm not sure if this will be enough to sway Claude enthusiasts to Codex.

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Comparison of OpenAI ChatGPT 5.5 and Claude Opus 4.7 — illustration