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我发现，当任务只需要“写作”时，它是最好的模型——不需要编码、工具使用或推理。比如校对和润色。我认为它在 progress.openai.com 这样的写作任务中，应该能和 GPT-5 一较高下。我很失望它被弃用了，而且在 GPT-5 的演示中也没有任何关于它的比较。附注：如果这里有人在使用专业版，并且仍然可以使用 4.5，能否请您用 progress.openai.com 上的提示词测试一下它，看看它和 5 的表现如何？

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I found it was the best model when the task at hand required only “writing” - no coding, tool use or reasoning. Like proofreading and suggesting better phrasing.<p>I think it would fare quite well against GPT-5 in writing tasks like the ones progress.openai.com.<p>I’m disappointed it’s been deprecated and there where not any comparisons with it in the GPT-5 demos.<p>ps: if someone here is on the pro plan and that still gives access to 4.5, could you please give it the prompts in progress.openai.com to see how it compares with 5?

Ask HN：你觉得 GPT-4.5 怎么样？