ChatGPT Login

How to Log In to ChatGPT

ChatGPT Login for New Users

Go to chatgpt.com and click "Sign up." Choose one of four options: enter your email and create a password, or use one-click sign-in with Google, Microsoft, or Apple. If you picked email, open your inbox, find the verification message from OpenAI, and click the link. Enter your name, birthday, and accept the terms. You are now on the ChatGPT interface and ready to start chatting.

The entire process takes about two minutes.

ChatGPT Login for Returning Users

Go to chatgpt.com and click "Log in," or go directly to chatgpt.com/auth/login. Enter your email and password, or tap "Continue with Google," "Continue with Microsoft," or "Continue with Apple." You will land on your chat history.

ChatGPT Login on Mobile and Desktop

The ChatGPT app is available on iOS, Android, Mac, and Windows. Download it from the Apple App Store, Google Play Store, or openai.com. Sign in with the same credentials you use on the web. Conversations, custom instructions, and settings sync across all devices automatically.

Fixing ChatGPT Login Problems

The most common fixes, in order: clear your browser cache and cookies, disable ad-blocker extensions (uBlock Origin, AdBlock Plus, and Ghostery are frequent culprits), switch to an incognito window, temporarily turn off your VPN, and update your browser to the latest version. If nothing works, check the OpenAI status page for active outages.

ChatGPT Free Online

You do not need an account, a subscription, or even an email address to use ChatGPT. OpenAI offers instant, free access directly in your browser.

How to Use ChatGPT Free Online Without an Account

Go to chatgpt.com and start typing. That is it. No sign-up form, no login screen, no payment wall. OpenAI introduced this zero-friction access to make it easy for anyone to try AI for the first time. The no-login version runs the same GPT-5.2 model that logged-in free users get, so you are not using a downgraded version.

This works on any device with a modern browser: laptop, phone, tablet. You can ask questions, get help with writing, brainstorm ideas, translate text, summarize articles, and more, all without creating any account.

What You Get Without Logging In

The no-login experience gives you access to ChatGPT's core conversational abilities powered by GPT-5.2 Instant. You can type prompts and receive AI-generated responses in real time. For most quick, one-off tasks, this is all you need.

What You Unlock by Creating a Free Account

While the no-login experience is fully functional for quick tasks, creating a free account (which costs nothing and takes two minutes) adds several useful features:

Saved chat history so you can revisit previous conversations. Custom instructions that tell ChatGPT about your preferences, writing style, or job role so every response is tailored to you. Voice mode for spoken conversations with the AI. Image generation with 2 to 3 free image creations per day. GPT Store access to use community-built custom GPTs for specialized tasks. Cross-device sync so your conversations follow you from laptop to phone.

The best approach is to start chatting without logging in, see if ChatGPT fits your needs, and then create a free account when you want those extras.

ChatGPT Free Plan Limits in 2026

The free plan runs GPT-5.2 Instant with a cap of 10 messages per 5-hour rolling window. When you hit that cap, ChatGPT silently switches to GPT-5.2 Mini, a lighter model that gives shorter, less detailed answers. You can keep chatting on Mini without limit. If you space your sessions, you can send up to 48 or more Instant-quality messages per day.

The free plan also includes web browsing (ChatGPT can search the internet for you), image uploads for analysis, and basic file handling.

OpenAI started testing ads on the free tier in the US in February 2026. Ads are shown based on your current conversation context, but your data is not shared with advertisers. You can dismiss ads and manage personalization in settings.

Paid Plans at a Glance

ChatGPT Go at $8/month gives roughly 10 times the message quota of the free plan. Still includes ads.

ChatGPT Plus at $20/month unlocks GPT-5.2 Thinking (the step-by-step reasoning model), Deep Research, Sora video generation, up to 160 messages every 3 hours, and no ads.

ChatGPT Pro at $200/month provides unlimited access to GPT-5.2 Pro with maximum context, compute, and priority speed. No ads.

What Is ChatGPT and How Does It Work?

ChatGPT is an AI chatbot built by OpenAI. It uses a large language model (LLM) trained on massive datasets of text to understand your questions and generate human-like responses. The model works by processing your input as a sequence of tokens and predicting the most likely next tokens to form a complete answer. This prediction happens billions of times per response, in milliseconds.

What separates ChatGPT from older chatbots is its ability to handle open-ended conversations. It does not follow a script or pull from a fixed database of answers. It generates original text every time, adapting to context, following complex instructions, and reasoning through problems.

The current model family, GPT-5.2 (released December 2025), retired all older models including GPT-4o. It comes in four variants: Mini (lightweight), Instant (standard), Thinking (reasoning), and Pro (maximum power). The Thinking variant is specifically trained to "think before answering," producing significantly better results on math, coding, analysis, and strategic tasks.

ChatGPT Alternatives

ChatGPT is excellent but not the only option. Each of these alternatives excels in specific areas, and all offer free tiers.

Claude by Anthropic

Claude specializes in long-form writing, careful reasoning, and precise instruction following. The flagship Opus 4.6 model (February 2026) is widely considered the top choice for tasks requiring structured analysis, document review, and iterative editing. Beyond chat, Claude offers Claude Code for terminal-based coding, a Chrome extension for browser automation, an Excel add-in, and Cowork for working directly with files on your desktop. Free tier available; Pro at $20/month.

Claude login: Go to claude.ai, click "Sign up," and register with email, Google, or Apple. Claude uses passwordless magic links for email authentication: enter your email, click the secure link sent to your inbox, and you are in. You may be asked to verify a phone number. Mobile apps available on iOS and Android.

Google Gemini

Gemini is tightly integrated with Gmail, Docs, Drive, Sheets, and Google Search. It excels at multimodal tasks (images, video, audio) and recently launched Personal Intelligence, which connects to your Google apps for personalized answers. Powered by the Gemini 3 model family. Free tier available; Google AI Pro at $19.99/month.

Gemini login: Uses your existing Google Account. Go to gemini.google.com and sign in with your Google credentials. No separate registration needed. If you do not have a Google Account, create one free at accounts.google.com. Mobile app available on Android and iOS.

Kimi by Moonshot AI

Kimi is built for long-context processing, complex coding, and agentic workflows. Kimi K2.5 (January 2026) has roughly 1 trillion parameters and supports four modes: Instant, Thinking, Agent, and Agent Swarm (up to 100 parallel sub-agents). Free with usage limits; paid membership for higher quotas.

Kimi login: Go to kimi.com, click "Sign up," and register with email, phone, or Google. Verify with a code. Available on iOS and Android.

Qwen by Alibaba Cloud

Qwen is a 397-billion-parameter open-weight model supporting 201 languages. Qwen 3.5 (February 2026) is free to use and available for local deployment under the Apache 2.0 license via Ollama or LM Studio. Features include text generation, image understanding, document processing, and web search.

Qwen login: Go to chat.qwen.ai and click "Sign in" with email, Google, or GitHub. Guest mode at chat.qwen.ai/c/guest works without an account.

Z.ai (formerly Zhipu AI)

Z.ai is a Chinese AI company from Tsinghua University, publicly listed on the Hong Kong Stock Exchange since January 2026. Its GLM-5 model (February 2026) powers a free chat interface for conversation, presentations, coding, data analysis, and image generation. Also offers AutoGLM, a smartphone AI agent.

Z.ai login: Start chatting at chat.z.ai with no account. Sign up with email or phone for full features.

Mistral AI (Le Chat)

Le Chat comes from the French AI company Mistral, founded by former Meta and Google DeepMind researchers. Known for strong multilingual reasoning, privacy focus, and open-source principles. Features include web search across certified sources, document OCR, deep research, image generation, and voice recognition. Free tier available; Le Chat Pro for higher limits.

Le Chat login: Go to chat.mistral.ai/login and sign up with email, Google, or Microsoft. If using email, create a password and verify. Available on iOS and Android.

Perplexity

Perplexity is an AI answer engine that pairs conversational AI with real-time web search and inline citations. Switch between GPT-5.2, Claude, Gemini, and Grok from a single interface. Free with daily limits.

Perplexity login: Go to perplexity.ai and sign up with email, Google, or Apple. Basic search works without an account.

DeepSeek

DeepSeek delivers strong reasoning and coding at extremely low cost. Open-weight model popular with developers. Free chat interface.

DeepSeek login: Go to chat.deepseek.com and sign up with email or phone. Basic chat works without an account.

Microsoft Copilot

Microsoft Copilot integrates directly with Word, Excel, Outlook, Teams, Edge, and Windows. Best for users already in the Microsoft ecosystem.

Copilot login: Sign in at copilot.microsoft.com with your Microsoft account. Basic features work in Edge without signing in.

Grok by xAI

Grok offers real-time access to X (Twitter) conversations, trends, and breaking news. Three variants: Grok-4, Grok-4 Heavy, and Grok-4 Fast.

Grok login: Sign in at x.com/i/grok with your X account. Basic features available for free X users; higher limits with X Premium.

ChatGPT No Login using API

If you want to build your own AI chat experience, similar to the no-login version of ChatGPT, the most direct path is through the OpenAI API. Here is how the ecosystem works in 2026 and how to get started.

The OpenAI API in 2026: What You Need to Know

OpenAI offers a pay-per-use API that lets developers integrate the same GPT models powering ChatGPT into their own applications. You are charged per token (roughly 0.75 words per token), with separate rates for input (your prompt) and output (the model's response).

The current flagship API models and their pricing as of February 2026:

gpt-5.2 (Thinking model): $1.75 per million input tokens, $14 per million output tokens. Cached inputs get a 90% discount at $0.175 per million. This is the same model behind ChatGPT Plus.

gpt-5.2-chat-latest (Instant model): Lower cost, faster responses. Ideal for high-volume chat applications.

gpt-5.2-pro (Pro model): Maximum intelligence. Available through the Responses API with support for the new xhigh reasoning effort setting.

gpt-4o and gpt-4.1-mini: Still available as legacy options at $2.50 and $0.30 per million input tokens respectively. Good for cost-sensitive applications.

OpenAI also offers a Batch API that provides a 50% discount on all tokens for non-time-sensitive tasks processed within a 24-hour window, and a Flex processing tier for lower prices with higher latency.

Responses API vs. Chat Completions API

OpenAI now offers two core APIs. The Responses API is the flagship, specifically designed for building agents. It is stateful by default (OpenAI manages conversation history for you), supports built-in tools like web search, code interpreter, file search, and image generation, and works natively with reasoning models. The Chat Completions API is the older endpoint that still works well for straightforward chat applications where you manage the message history yourself.

For new projects, OpenAI recommends the Responses API. The Assistants API is being sunset in 2026 after the Responses API achieves full feature parity.

Quick Start: A Simple ChatGPT-Style Chatbot (Python)

Here is a minimal example using the OpenAI Python SDK to create a no-login chatbot backend:

from openai import OpenAI

client = OpenAI(api_key="your-api-key")

def chat(user_message, conversation_history=None):
    if conversation_history is None:
        conversation_history = []

    conversation_history.append({
        "role": "user",
        "content": user_message
    })

    response = client.chat.completions.create(
        model="gpt-5.2-chat-latest",
        messages=[
            {"role": "system", "content": "You are a helpful assistant."},
            *conversation_history
        ]
    )

    assistant_message = response.choices[0].message.content
    conversation_history.append({
        "role": "assistant",
        "content": assistant_message
    })

    return assistant_message, conversation_history

# Usage
history = []
reply, history = chat("What is machine learning?", history)
print(reply)

Install the SDK with pip install openai and get your API key from platform.openai.com/api-keys.

Quick Start: Using the Responses API (Python)

The Responses API simplifies state management. You do not need to track conversation history yourself:

from openai import OpenAI

client = OpenAI(api_key="your-api-key")

# First message
response = client.responses.create(
    model="gpt-5.2",
    input="What are the benefits of renewable energy?"
)

print(response.output_text)

# Follow-up (pass the previous response ID to continue the thread)
follow_up = client.responses.create(
    model="gpt-5.2",
    input="Can you focus on solar specifically?",
    previous_response_id=response.id
)

print(follow_up.output_text)

The Responses API handles conversation memory on OpenAI's servers, which means your backend code stays clean and stateless.

Quick Start: JavaScript/Node.js

import OpenAI from "openai";

const client = new OpenAI({ apiKey: "your-api-key" });

async function chat(userMessage) {
  const response = await client.chat.completions.create({
    model: "gpt-5.2-chat-latest",
    messages: [
      { role: "system", content: "You are a helpful assistant." },
      { role: "user", content: userMessage }
    ]
  });

  return response.choices[0].message.content;
}

const reply = await chat("Explain quantum computing simply.");
console.log(reply);

Install with npm install openai.

Deploying a ChatGPT-Like UI With ChatKit

If you want to skip building a frontend entirely, OpenAI's ChatKit is an embeddable chat interface that you can drop into any website. It handles streaming responses, thread management, and branding customization out of the box.

The workflow is: design your agent logic in Agent Builder (a visual drag-and-drop canvas), publish it with a workflow ID, then embed ChatKit in your site by adding a single script tag and a few lines of JavaScript:

<script
  src="https://cdn.platform.openai.com/deployments/chatkit/chatkit.js"
  async
></script>

ChatKit supports React, Vue.js, and Angular, plus a vanilla JavaScript option. It is generally available to all developers and included with standard API pricing (you only pay for model tokens).

Building With the Agents SDK

For more complex applications, OpenAI's open-source Agents SDK (available for both Python and TypeScript) provides a framework for building multi-agent systems with built-in tool use, handoffs between agents, guardrails for safety, and tracing for debugging. It works with OpenAI models by default but is provider-agnostic, meaning you can swap in Claude, Gemini, or any other model.

This is the recommended approach if you need features like persistent memory (via SQLiteSession), multi-step reasoning workflows, tool calling (web search, code execution, file handling), or connecting to external services through MCP (Model Context Protocol) connectors for Google apps, Dropbox, Salesforce, and more.

Cost Considerations for Developers

Building a chatbot that handles real traffic requires thinking about costs carefully. A few practical strategies:

Use cached inputs. If your system prompt or instructions are the same across requests, cached input tokens cost 90% less with GPT-5.2.

Route by complexity. Send simple queries to cheaper models like gpt-4.1-mini ($0.30 per million input tokens) and reserve gpt-5.2 for complex reasoning tasks.

Use the Batch API. For non-real-time workloads like content generation, data processing, or analytics, the Batch API cuts costs by 50%.

Set max_tokens limits. Prevent runaway costs from unexpectedly long responses by capping output length.

Monitor usage. OpenAI's usage dashboard and billing APIs let you set spending limits and track token consumption in real time.