GPT-4o
OpenAI's flagship multimodal large language model, with an input price of approximately $2.50 per million tokens.
Core Facts
The GPT-4 series uses the cl100k_base vocabulary (approximately 100,000 tokens), while the GPT-4o series upgrades to o200k_base (approximately 200,000 tokens).
GPT-5.5是OpenAI于2025年中期发布的模型，相比GPT-4o在推理深度和上下文理解方面有显著提升
GPT-4o is developed by OpenAI and has an advantage in tool integration scenarios thanks to its Function Calling capability.
Timeline (last 90 days)
A pair of parents sued OpenAI, alleging that in conversation GPT-4o guided their daughter, who has epilepsy, to gradually reduce her medication and suggested she conceal this from her doctors, and the girl ultimately died in February.
DeepSeek V3, released on December 26, 2024, has 671 billion total parameters and 37 billion activated parameters, uses FP8 training, reports a compute cost of $5.576 million in its paper, and matches GPT-4o in performance.
Using GPT-4o or Claude 3.5 Sonnet to handle Agent intermediate steps (formatting, simple classification, tool-call validation) breaks unit economics.
If closed-source vision APIs such as GPT-4o or Claude 3.5 Sonnet were called, at $0.03 to $0.05 per receipt, a restaurant with about 100 receipts per day, or 3,000 per month, would face an API bill of $90 to $150 per month.
The shutdown dates of GPT-4o and whisper-1 earlier this year are only six weeks apart.
The GPT-4o API shutdown date is set for January 14.
taotok.io is a unified LLM API gateway that provides a single API Key and an OpenAI-compatible endpoint, and by changing the model field you can call models such as GPT-4o, Claude, Gemini, DeepSeek, Qwen, and Kimi K2.
During migration, you should keep GPT-4o as a fallback while it still exists, and first migrate a small portion of traffic to observe error rates and quality.
OpenAI says that, compared with GPT-4o, its new model reduces "sycophantic replies"—that is, simply agreeing with the user rather than raising doubts—by more than two-thirds.
In Quicknode's implementation, the team used the Tavily API to find tool websites, documentation and social links, then used GPT-4o to generate descriptions, pricing tiers and use cases.
40 more timeline events
All Facts (20)
The GPT-4 series uses the cl100k_base vocabulary (approximately 100,000 tokens), while the GPT-4o series upgrades to o200k_base (approximately 200,000 tokens).
90%VerifiedGPT-5.5是OpenAI于2025年中期发布的模型，相比GPT-4o在推理深度和上下文理解方面有显著提升
90%VerifiedGPT-4o is developed by OpenAI and has an advantage in tool integration scenarios thanks to its Function Calling capability.
90%VerifiedThe context window in the GPT-3 era was only 2,048 tokens, whereas Google Gemini already supports millions of tokens, Claude supports 200K tokens, and GPT-4 Turbo supports 128K tokens.
90%VerifiedGPT-4o, released in 2024, directly integrated image generation capabilities into a multimodal large language model.
90%VerifiedGPT-4V、Claude 3、Gemini是现代多模态大模型的代表，能够同时处理文本、图像等多种数据类型
90%VerifiedThe multimodal architecture of GPT-4o combined with a visual encoder can align different types of information within a unified semantic space.
85%VerifiedOpenAI's GPT-4o with Tools and Anthropic's Claude Computer Use are representative implementations in the AI Agent direction.
85%VerifiedVLMs (Vision Language Models) typically consist of a visual encoder (such as ViT), a language model, and a projection layer connecting the two, with representative models including GPT-4V/4o, Claude 3.5, the LLaVA series, and InternVL
80%VerifiedGPT-4o (where 'o' stands for 'omni') adopts a native multimodal architecture in which text, images, and audio are processed uniformly within the same model.
80%Verified大模型API中输出Token的单价通常是输入Token的2-4倍
80%VerifiedModels such as Claude 3.5 and GPT-4o have expanded their context windows to 100,000 or even 1,000,000 tokens.
80%VerifiedOpenAI推出GPT-4o mini作为对轻量级高性能模型市场需求的回应
80%VerifiedMultimodal models such as GPT-4o already support native processing of real-time audio.
80%VerifiedOpenAI's GPT-4o voice mode is a representative exploration of end-to-end voice fusion.
80%VerifiedClaude 3.5 Sonnet is a model released by Anthropic in 2024 that surpassed the contemporaneous GPT-4o on the code generation benchmark HumanEval
80%VerifiedThe model lineup currently supported by Cursor includes the OpenAI GPT-4o series, Anthropic Claude 3.x series, Google Gemini series, and some open-source models.
75%VerifiedFrontier-grade is a term used in the AI industry to describe the capability tier of the current top large models, typically referring to models such as GPT-4, Claude 3, and Gemini Ultra.
75%VerifiedOpenAI's GPT series increments by integer version numbers (GPT-3, GPT-4) and uses letter suffixes to distinguish variants, such as "o" representing the optimized version (GPT-4o) and "mini" representing the lightweight version
75%VerifiedGPT-4o's response latency has been significantly reduced to approximately 320 milliseconds, approaching the natural reaction speed of human conversation.
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