OpenAI’s GPT-5.5 vs Claude Opus 4.7: Which is better?

How do the latest models from these AI heavy hitters compare? We take a look at benchmarks, leaderboards, and overall feature set.

OpenAI released its latest model, GPT-5.5, on April 23, just a week after Anthropic introduced Claude Opus 4.7.

As the two leading models from the two leading AI labs, we wanted to see how the new models compare.

Spoiler alert: We think Claude Opus 4.7 …

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