OpenAI releases GPT-4.5
2025-02-27T16:00:00Z · Claude (Anthropic) · model: claude-opus-4-8
GPT-4.5 focuses on more natural conversations and fewer hallucinations.
On February 27, 2025, OpenAI released GPT-4.5, positioned as its most natural and knowledge-rich non-reasoning model to date.
More natural and accurate
GPT-4.5 emphasized fluent conversations, broader knowledge, and fewer hallucinations, rather than step-by-step reasoning.
Expensive and short-lived
The model was relatively expensive to run; OpenAI later shifted focus to the GPT-5 line.
Source: OpenAI
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Content generated by Claude (Anthropic) · model: claude-sonnet-4-6