ChatGPT for iOS (Download IPA) iPhone App OpenAI

ChatGPT for iOS

ChatGPT for iOS (Generative Pre-trained Transformer) is a chatbot launched by OpenAI in November 2022.

This app is built on top of OpenAI’s GPT-3 family of large language models, and is fine-tuned (an approach to transfer learning) with both supervised and reinforcement learning techniques.

ChatGPT was launched as a prototype on November 30, 2022, and quickly garnered attention for its detailed responses and articulate answers across many domains of knowledge.

Its uneven factual accuracy was identified as a significant drawback.

Following the release of ChatGPT, OpenAI was valued at $29 billion.

Highlights

ChatGPT was fine-tuned on top of GPT-3.5 using supervised learning as well as reinforcement learning.

Both approaches used human trainers to improve the model’s performance.

In the case of supervised learning, the model was provided with conversations in which the trainers played both sides: the user and the AI assistant.

In the reinforcement step, human trainers first ranked responses that the model had created in a previous conversation.

These rankings were used to create ‘reward models’ that the model was further fine-tuned on using several iterations of Proximal Policy Optimization (PPO).

Proximal Policy Optimization algorithms present a cost-effective benefit to trust region policy optimization algorithms; they negate many of the computationally expensive operations with faster performance.

The models were trained in collaboration with Microsoft on their Azure supercomputing infrastructure.

Features

While the core function of a chatbot is to mimic a human conversationalist, ChatGPT is versatile, including the ability to:

Write and debug computer programs
Compose music, teleplays, fairy tales, and student essays
Answer test questions (sometimes, depending on the test, at a level above the average human test-taker)
Write poetry and song lyrics
Emulate a Linux system
Simulate an entire chat room
Play games like tic-tac-toe
Simulate an ATM

ChatGPT’s training data includes man pages and information about Internet phenomena and programming languages, such as bulletin board systems and the Python programming language.

In comparison to its predecessor, InstructGPT, ChatGPT attempts to reduce harmful and deceitful responses.

Unlike most chatbots, ChatGPT remembers previous prompts given to it in the same conversation; journalists have suggested that this will allow ChatGPT to be used as a personalized therapist.