ChatGPT GPT-5.5 vs Claude Opus 4.7 vs Gemini 3.1 Pro: How does OpenAI’s latest model compare against rivals?

OpenAI launched its GPT-5.5 model earlier this week with the aim of taking on Anthropic’s recently launched Claude Opus 4.7 and Google’s Gemini 3.1 Pro models. The new model is claimed to come with massive leaps in coding capabilities along with improved agentic abilities and scientific research.

How does GPT-5.5 compare against Claude and Gemini?