{"slug": "ask-hn-why-not-compare-fable-5-with-gpt-pro-why-compare-with-gpt-xhigh", "title": "Ask HN: Why not compare Fable 5 with GPT \"Pro\"? Why compare with GPT xhigh?", "summary": "Benchmarks comparing AI models consistently pit Fable 5 against GPT 5.5 xhigh, but a user argues this is an unfair matchup because GPT 5.5 Pro, which has been available for some time and outperforms Opus 4.8 Max, would be a more appropriate comparison. The user notes that both Fable 5 and GPT Pro have long response times, unlike GPT xhigh which often responds in minutes, raising questions about the validity of current benchmark choices.", "body_md": "| ||||||||||||\n1 point by |\nEvery benchmark I see compares the super model Fable 5 with GPT 5.5 xhigh, but that's not a fair comparison because GPT 5.5 Pro has existed for a while and consistently delivers better results than Opus 4.8 Max, so doesn't it make more sense to compare Fable 5 with GPT Pro, instead? FYI, both of them take a long time to respond, as opposed to GPT xhigh which often returns in a couple of minutes. | |||||||||||\n|", "url": "https://wpnews.pro/news/ask-hn-why-not-compare-fable-5-with-gpt-pro-why-compare-with-gpt-xhigh", "canonical_source": "https://news.ycombinator.com/item?id=48496661", "published_at": "2026-06-11 21:27:24+00:00", "updated_at": "2026-06-11 21:50:16.678225+00:00", "lang": "en", "topics": ["large-language-models", "artificial-intelligence", "ai-products", "ai-research"], "entities": ["Fable 5", "GPT 5.5 xhigh", "GPT 5.5 Pro", "Opus 4.8 Max"], "alternates": {"html": "https://wpnews.pro/news/ask-hn-why-not-compare-fable-5-with-gpt-pro-why-compare-with-gpt-xhigh", "markdown": "https://wpnews.pro/news/ask-hn-why-not-compare-fable-5-with-gpt-pro-why-compare-with-gpt-xhigh.md", "text": "https://wpnews.pro/news/ask-hn-why-not-compare-fable-5-with-gpt-pro-why-compare-with-gpt-xhigh.txt", "jsonld": "https://wpnews.pro/news/ask-hn-why-not-compare-fable-5-with-gpt-pro-why-compare-with-gpt-xhigh.jsonld"}}