gpt-4.5-preview
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GPT-4.5 (Preview) is a research preview of OpenAI’s latest language model, designed to advance capabilities in reasoning, creativity, and multi-turn conversation. It builds on previous iterations with improvements in world knowledge, contextual coherence, and the ability to follow user intent more effectively. The model demonstrates enhanced performance in tasks that require open-ended thinking, problem-solving, and communication. Early testing suggests it is better at generating nuanced responses, maintaining long-context coherence, and reducing hallucinations compared to earlier versions. This research preview is intended to help evaluate GPT-4.5’s strengths and limitations in real-world use cases as OpenAI continues to refine and develop future models. Read more at the [blog post here.](https://openai.com/index/introducing-gpt-4-5/)
Input:$75 / 1M tokens
Output:$150 / 1M tokens
Context:128K tokens
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14 availablefrequency_penalty
-202
logit_bias
logprobs
max_tokens
presence_penalty
-201.999
response_format
seed
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structured_outputs
temperature
012
tool_choice
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top_logprobs
top_p
011
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