If you don't already have an OpenAI account, don't make one. You don't need it. There are several other ways to access it without an accounts. Shamelessly stolen from Reddit:

No Sign-Up:

Perplexity AI [https://www.perplexity.ai/] (web-browsing)

Vitalentum [https://vitalentum.net/free-gpt]

OraChat [https://ora.ai/chatbot-master/openai-chatgpt-chatbot]

Vicuna [https://chat.lmsys.org/]

GPTGO [https://gptgo.ai/] (web-browsing)

AnonChatGPT [https://anonchatgpt.com/]

NoowAI [https://noowai.com/]

Character AI [https://beta.character.ai/]

BAI Chat [https://chatbot.theb.ai/]

iAsk AI [https://iask.ai/] (web-browsing)

Phind AI [https://www.phind.com/] (web-browsing)

GPT4All [https://gpt4all.io/index.html] (open-source) [suggested by u/CondiMesmer]

DeepAI Chat [https://deepai.org/chat]

Teach Anything [https://www.teach-anything.com/]

Forefront AI [https://chat.forefront.ai/]

Sign-Up:

Poe AI [https://poe.com/ChatGPT]

Bard [https://bard.google.com/] (web-browsing)

Easy-Peasy AI [https://easy-peasy.ai/]

HuggingChat [https://huggingface.co/chat] (web-browsing)

WriteSonic [https://app.writesonic.com/chat]

FlowGPT [https://flowgpt.com/chat]

Sincode AI [https://www.sincode.ai/]

AI.LS [https://ai.ls/]

LetsView Chat [https://letsview.com/chatbot] (only 10 messages allowed)

CapeChat [https://chat.capeprivacy.com/]

Open-Assistant [https://open-assistant.io/] (open-source)

GlobalGPT [https://www.globalgpt.nspiketech.com/]

Bing Chat [bing.com/chat]

JimmyGPT [https://www.jimmygpt.com/]

Codeium [https://codeium.com/] *mainly for coding*

YouChat [you.com/chat]

Frank AI [https://franks.ai/]

OpenAI Playground [platform.openai.com/playground]

Great For Blog Articles (with chatbot):

Copy AI [https://app.copy.ai/]

TextCortex AI [https://app.textcortex.com/]

Marmof [https://app.marmof.com/]

HyperWrite [https://app.hyperwriteai.com/chatbot]

WriterX [https://app.writerx.co/]

Best File Chatbots (PDF's, etc.):

AnySummary [https://www.anysummary.app/] (3 per day)

Sharly AI [https://app.sharly.ai/]

Documind [https://www.documind.chat/]

ChatDOC [https://chatdoc.com/]

Humata AI [https://app.humata.ai/]

Ask Your PDF [https://askyourpdf.com/]

ChatPDF [https://www.chatpdf.com/]

FileGPT [https://filegpt.app/chat]

ResearchAide [https://www.researchaide.org/]

Pensieve AI [https://pensieve-app.springworks.in/]

Docalysis [https://docalysis.com/] (suggested by u/upsontown)

Best Personal Assistant Chatbots:

Pi, your personal AI [https://heypi.com/talk]

Kuki AI [https://chat.kuki.ai/]

Replika [https://replika.com/]

YourHana AI [https://yourhana.ai/]