The free version of ChatGPT has recently received significant upgrades. Free users can now utilize several advanced features that were previously limited to paid subscribers:
While free users now have access to these advanced features, there are some usage limitations, including a limit on the number of messages that can be sent using GPT-4o and lower overall usage limits. Free users also don't have access to DALL-E for image generation.
ChatGPT Plus ($20/month)
Enterprise Plan (Custom Pricing)
On September 12, OpenAI released the o1-preview, a new series of reasoning models that are "designed to spend more time thinking before they respond. They can reason through complex tasks and solve harder problems than previous models in science, coding, and math." The new models, which currently include o1-mini and o1-preview, are also referred to as Strawberry, their internal codename.
The new o1 models are currently available (with weekly message limits) to ChatGPT Plus and Team users, who can access them through the model picker. OpenAI stated a version of these models will be available in the future, and there are plans for added features like browsing and file and image uploads.
Ethan Mollick describes these new models as "amazing, still limited, and, perhaps most importantly, a signal of where things are heading" and the 9/13 Chain of Thought newsletter contends it "opens a new paradigm in AI progress."