lol I love how OpenAI just straight up doesn't compare their model to others on these release pages. Basically telling us they know Gemini and Opus are better but they don't want to draw attention to it
This was the one thing I scanned for. No comparison against Opus. See ya.
Not sure why they don't compare with others, but they are actually leading on the benchmarks they published. See here (bottom) for a chart comparing to other models: https://marginlab.ai/blog/swe-bench-deep-dive/