概述
The original GPT-4 report, GPT-4 Turbo announcement and GPT-4o announcement describe different versions; ChatGPT availability and API availability are separate.
深入探讨
OpenAI’s 2023 GPT-4 announcement described image inputs in a research preview, and its technical report says the model was fine-tuned with RLHF. In November 2023, OpenAI announced GPT-4 Turbo with a 128K context window. GPT-4o launched in 2024 as an omni model with text, audio and image capabilities. OpenAI later retired GPT-4o from ChatGPT on February 13, 2026; API deprecations are documented separately and may have different dates. These claims refer to specific product surfaces and model versions. Before GPT-4o, ChatGPT Voice Mode used a three-model pipeline: speech recognition converted audio to text, a GPT model processed it, then text-to-speech generated audio. OpenAI described GPT-4o as an end-to-end model trained across text, vision and audio for direct input/output. These are generation-specific descriptions. OpenAI also announced GPT-4o access for free ChatGPT users with usage limits; that statement concerns ChatGPT availability and does not imply unlimited access or API availability.
现实世界的实施
Reading GPT-4’s research report for its image-input preview and documented limits.
Checking the November 2023 DevDay post for GPT-4 Turbo’s 128K context window.
Treating RLHF as a post-training method described for GPT-4, not as the source of all model capability.
Checking separate ChatGPT retirement and API deprecation notices for the exact model/version.
GPT-4 和 GPT-4o 的未来
Before using or citing an OpenAI model, verify the model identifier and product surface in current official release and deprecation documentation. Historical capabilities do not establish present-day availability.
付诸实践
为什么这很重要
- 供应商策略. 供应商路线图会影响您的团队接下来可以构建的功能。
- 成本与预算. 商业条款和部署选项会影响长期成本和风险。
- 风险与安全. 公司激励措施塑造了产品默认、安全态势和开放性。
留意
- 发布公告可能会超过实际生产工作流程的稳定性。
- API 定价或政策转变可能会在一夜之间打破假设。
- 单一供应商依赖性增加了锁定和迁移成本。
后续步骤
- 使用您自己的任务和数据集评估提供商。
- 在集成之前查看隐私、安全和法律条款。
- 维护跨模型或供应商的后备计划。
- 监控发行说明，以便路线图的更改不会让团队感到意外。
不断探索
常见问题
What is GPT-4 and GPT-4o?
GPT-4 and GPT-4o are historical OpenAI model families with distinct capabilities and release timelines. The original GPT-4 report, GPT-4 Turbo announcement and GPT-4o announcement describe different versions; ChatGPT availability and API availability are separate.
GPT-4o 中的“o”代表什么？
“o”代表“omni”，反映出 GPT-4o 是一个同时处理文本、音频和视觉的单一模型。
为什么 GPT-4o 的语音模式比 GPT-4 早期的语音功能更快？
早期的语音模式链接了三个独立的模型，增加了延迟。 GPT-4o 在单个网络中端到端处理音频，将延迟缩短到接近对话的速度。
在 OpenAI 2023 年 3 月的 GPT-4 报告中，为研究预览描述了哪种新的输入方式？
OpenAI’s GPT-4 announcement and technical report describe image inputs in a research preview; that historical statement should not be read as a claim about current access or every GPT-4 endpoint.
GPT-4 Turbo 提供了多大的上下文窗口大小？
GPT-4 Turbo 将上下文窗口扩展到 128k 个令牌，允许更长的文档和对话。
OpenAI 的 GPT-4 技术报告称使用哪种技术来微调模型的行为？
OpenAI’s GPT-4 report says the model’s behavior was fine-tuned using reinforcement learning with human feedback (RLHF). This question is specific to GPT-4 and does not generalize the claim to GPT-4o.