Chatbot Showdown: Comparing ChatGPT, Bing Chat, Perplexity AI, Cloud AI, Google Bard, and HeyPi

Table of Contents

• Introduction
• Pricing and Free Plans
• Language Models Used
• Prompt Size Limits
• Conclusion

Introduction to Top AI Chatbots and Virtual Assistants

Chatbots and virtual assistants have taken the world by storm. Powered by advanced artificial intelligence, these tools can understand natural language prompts and provide helpful information or engage in conversation. In this post, we will compare the top chatbots - ChatGPT, Bing Chat, Google Bard, Perplexity AI, Anthropic Claude, and HeyPi - across key categories to help you determine the right one for your needs.

We will specifically analyze and contrast their pricing and plans, underlying language models, prompt size limits, and more. Whether you are an enterprise evaluating chatbots or an individual user looking for a digital assistant, read on to find out which solution offers the capabilities you need.

Overview of Chatbots Being Compared

Let's briefly introduce the chatbots we will compare: ChatGPT - Launched by OpenAI in November 2022, ChatGPT is powered by the company's GPT-3.5 language model. It can understand natural language prompts and provide human-like conversational responses. Bing Chat - Microsoft integrated chatbot capabilities into Bing powered by an AI model developed by OpenAI. It is designed to search the web and answer questions. Google Bard - Unveiled in February 2023, Bard is Google's conversational AI service built on the company's proprietary language model PaLM. It is designed for natural dialogue. Perplexity AI - Developed by Anthropic to serve as helpful virtual assistants, Perplexity AI chatbots are powered by Constitutional AI technology focused on safety and honesty. Anthropic Claude - Claude is one of Anthropic's virtual assistant chatbots, trained to be harmless, honest and helpful. It relies on Constitutional AI like Perplexity. HeyPi - From Inflection AI, HeyPi is positioned as a digital assistant focused on empathy, honesty and humor. It uses the proprietary Inflection One language model.

How to Access Each Chatbot

ChatGPT: Go to chat.openai.com Bing Chat: Go to bing.com and click on the chat icon Google Bard: Go to bar.google.com Perplexity AI: Go to perplexity.ai Anthropic Claude: Accessible via Anthropic's API HeyPi: Go to heypi.com

Pricing and Free Plans for Leading Chatbots

One of the first considerations when evaluating chatbots is cost. Here is an overview of the pricing and availability of free plans for the major solutions:

ChatGPT - Offers ChatGPT Plus paid plan at $20/month. But free version available with some limitations.

Bing Chat - Free access, but Bing Chat for enterprise is $5/month per user.

Google Bard - Free access currently. No paid tiers announced yet.

Perplexity AI - Free tier available. Paid plans at $20/month or $200/year.

Anthropic Claude - Currently free to try via waitlist. Paid enterprise plans expected in future.

HeyPi - Free access without any login requirements.

Language Models Powering the Top Chatbots

The conversational abilities of chatbots depend heavily on the underlying AI language model. Here we compare the models used by each solution:

ChatGPT - Uses GPT-3.5 for free version, GPT-4 for ChatGPT Plus subscribers.

Bing Chat - Relies on OpenAI's GPT-4 model.

Google Bard - Leverages Google's proprietary language model called PaLM-2.

Perplexity AI - Uses an ensemble of multiple constitutional AI models.

Anthropic Claude - Constitutional AI model trained to be helpful, honest and harmless.

HeyPi - Built on Inflection One, the company's own language model.

Prompt Size Limits for Leading Chatbots

ChatGPT Prompt Limit

Free ChatGPT has a 4,096 token limit. But I tested it and found that it accepted prompts up to around 31,000 characters before complaining about length. When I pasted 31,429 characters from a blog post, it gave an error saying the prompt was too long.

Bing Chat Prompt Limit

Bing Chat clearly states a prompt limit of 4,000 characters. When pasting a prompt with over 7,000 characters, it truncated the input to 4,000 characters.

Perplexity AI Prompt Limit

By testing, I found Perplexity AI accepts prompts up to approximately 9,200 characters. When I tried 9,239 characters, it said the text was too long.

Anthropic Claude Prompt Limit

As an AI assistant focused on harmless, honest dialog, Claude has strict prompt length limits. The free Claude caps prompts at around 1,000 tokens or 300 words based on my testing.

Google Bard Prompt Limit

Google Bard accepts prompts up to about 10,000 characters based on my testing. It simply truncates any text past that limit without showing an error.

HeyPi Prompt Limit

Among the chatbots tested, HeyPi has the lowest prompt length limit of 1,000 characters. When pasting a prompt with 1,674 characters, it returned an error saying the message exceeds 1,000 characters.

Conclusion

Summary of Key Differences

To recap, while all the major chatbots leverage advanced AI, we saw some key differences:

• ChatGPT and Perplexity AI offer both free and paid tiers while the rest are free.
• Each chatbot relies on its own proprietary language model or OpenAI's GPT-4.
• Prompt length limits vary significantly from 1,000 characters to over 300,000.

Final Thoughts

I hope this comparison provides useful insights to help choose the right chatbot based on your priorities. Test them out yourself to get a first-hand feel. While they have some common capabilities, features like pricing, language model, and prompt limits can vary. Keep these parameters in mind while evaluating chatbots for your needs.

FAQ

Q: Which chatbot has the highest character limit?
A: Of the chatbots compared, Cloud AI has the highest character limit at around 352,000 characters.

Q: Do any of the chatbots have paid versions?
A: Yes, ChatGPT has a paid ChatGPT+ version, and Bing Chat has paid enterprise plans.

Q: What AI language models do the chatbots use?
A: They use models like GPT-3.5, GPT-4, Pathways, Jurassic-1, and proprietary models created by their developers.

Q: Which chatbot is completely free?
A: Google Bard, HeyPi, and the free versions of ChatGPT and Perplexity AI are completely free to use.

Q: What is the prompt size limit for HeyPi?
A: Of the chatbots compared, HeyPi has the lowest limit at 1,000 characters.

Q: How can I access these chatbots?
A: You can access them through their websites - chat.openai.com, bing.com/chat, perplexity.ai, cloud.ai, bartender.google.com, and heypi.com.

Q: What chatbot won in terms of prompt size limits?
A: Cloud AI accepts the longest prompts of around 352,000 characters, making it the winner for prompt size limits.

Q: Were all the chatbots compared directly?
A: Yes, this comparison directly tested each chatbot's prompt limits and capabilities.

Q: Which chatbot would be best for lengthy conversations?
A: Cloud AI would likely be the best for lengthy conversations given its very high prompt character limit.

Q: Should I pay for a chatbot?
A: The free versions have decent capabilities, so you may not need to pay, but paid versions provide additional features.