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Free AI Chat with ChatGPT, Claude and Gemini

ChatGPT 6 Astra, ChatGPT 6 Sol, ChatGPT 5.6 Sol, Claude Opus 5.5, Gemini 2.0, Perplexity, DeepSeek and more - All accessible from one platform. Free to start, no signup needed for your first question. New to all of this? The AI Chatbot hub explains what each model is for, while our Best Free AI Chatbots guide compares the strongest free choices side by side.

Free ChatGPT Compare AI Models

Choose Your AI Assistant

Each model has different strengths. Pick based on your task - From writing and coding to real-time search and long document analysis.

OpenAI

ChatGPT 6 Astra

OpenAI's GPT-6 flagship, above the whole GPT-5.6 family. Strongest on very long documents (96.3% recall up to 1M tokens) and agentic coding. It carries the heaviest credit weight on the site, so keep it for the hardest problems.
New

ChatGPT 6 Sol

The middle GPT-6 tier: difficult work at a quarter of Astra's credit weight, with about half the factual errors of GPT-5.6 Sol on OpenAI's test.
New

ChatGPT 6 Luna

The efficient GPT-6 tier for quick, high-volume tasks. Fewer factual errors than GPT-5.6 Sol on OpenAI's test, at the lightest GPT-6 credit weight.
New

ChatGPT 5.6 Sol

The most capable GPT-5.6 variant - state of the art on coding, knowledge work and science. Pick this for the hardest problems.
New

ChatGPT 5.6 Terra

The balanced GPT-5.6. Near-Sol quality with noticeably lower latency and cost - the sensible default for everyday heavy use.
New

ChatGPT 5.6 Luna

The fast, affordable GPT-5.6. Built for speed on quick questions, drafting and high-volume chat where responsiveness matters more than depth.
New

ChatGPT 5.5

OpenAI's flagship before GPT-5.6. Stronger reasoning, sharper instruction-following and more reliable long-form output than GPT-5. The top OpenAI pick for hard tasks.
New

ChatGPT 5

OpenAI's proven flagship. Exceptional reasoning, coding, math and multi-step instructions. Great performance across every task type.

ChatGPT 4o

Fast and capable multimodal model. Great for everyday tasks, drafting, summarizing and general Q&A.; Strong balance of speed and quality.
Free tier

ChatGPT 4.1

Strong coding and instruction-following. One million token context window. Excellent for large-codebase analysis and long document summarization.
Anthropic

Claude Opus 5.5

Anthropic's new leading model and the first of the Claude 5.5 family: 89.9% on SWE-bench Pro and Fable 5.1-level results on most work, at a lower credit weight than Opus 5.
New

Claude Opus 5

The Opus 5 generation, now succeeded by Opus 5.5. A step-change in deep reasoning, agentic coding and long-form work over Opus 4.7.

Claude Sonnet 5

Near-Opus quality at everyday speed. Anthropic's best speed-to-intelligence balance yet - outstanding for writing, coding and analysis.
New

Claude Opus 4.7

The previous Anthropic flagship. Elite reasoning, nuanced writing and complex analysis. Ideal for research, legal, medical and technical work.

Claude Sonnet 4.6

A great balance of capability and speed. Outstanding for writing, code review, analysis and multi-document tasks.

Claude Haiku 4.5

Anthropic's fastest model. Instant responses for simple questions, short summaries and lightweight tasks. Lowest cost per question.
Fast
Google, Perplexity and More

Gemini 2.0 Flash

Google's multimodal AI. Excellent at reasoning, coding and creative tasks. Natively understands images and long documents with a 1M token context.
Fast

Perplexity Sonar

Real-time web search with cited sources. The best AI for current events, market research, fact-checking and any question requiring up-to-date information.
Live Search

DeepSeek

DeepSeek's fast open-weights model. Near-instant answers for code, math and everyday questions, with a huge context window for long documents.
Open source

Also available: Claude Sonnet 3.7, Claude Sonnet 3.5, Perplexity Sonar Pro and Perplexity Web Search.

New to AI jargon? Start with the AI Glossary: what an LLM (Large Language Model) is, what causes a Hallucination, how a Prompt and a Context window work, what RAG means, and what makes an AI agent different from a chatbot.

Which Model Should You Use?

A practical guide to picking the right AI for your task. Full breakdowns live on Compare AI Models.

Task Best Model Runner-Up Why
Complex reasoning Claude Opus 5.5 ChatGPT 6 Astra Elite multi-step logic
Code generation Claude Opus 5.5 ChatGPT 6 Astra Top SWE-bench Pro and Terminal-Bench 4.0 scores
Long documents Claude Sonnet 5 ChatGPT 4.1 200K - 1M token context
Real-time search Perplexity Sonar - Live web search with citations
Creative writing Claude Opus 5 ChatGPT 5 Nuance, voice and style
Math and science DeepSeek Claude Opus 5 Chain-of-thought reasoning
Quick everyday questions Claude Haiku 4.5 Gemini 2.0 Flash Fastest response time
Multimodal (images) Gemini 2.0 Flash ChatGPT 4o Native image understanding

These chat models can interpret an uploaded image, but they do not replace a face across every frame of an animation. Use Face Swap Video for footage or GIF Face Swap for a looping animation.

More Gemini versions: Gemini 1.5 Pro, Gemini 1.5 Flash, Gemini 1.0 Pro

Common Use Cases

AI chat assistants are replacing search engines, writing assistants, tutors and coding tools - All in one conversation.

Writing and Editing

Draft emails, essays, cover letters, reports and marketing copy. Rewrite in any tone or style instantly.

Code Review and Debugging

Paste broken code and get an explanation plus fix. Generate functions from plain-English descriptions.

Research and Summarization

Summarize long documents, research papers and articles. Extract key points in seconds.

Data Analysis

Explain data trends, write SQL queries, create analysis plans and interpret statistical results.

Learning and Tutoring

Get step-by-step explanations of complex topics at any level. Ask follow-up questions in plain English.

Business Strategy

Brainstorm ideas, analyze competitors, draft business plans and prepare for meetings or pitches.

Legal and Compliance

Draft contracts, understand regulations, review terms of service and flag potential legal risks.

Customer Support Scripts

Write FAQ answers, email templates, chatbot flows and escalation procedures for your team.

Start Chatting in Seconds

No downloads, no complex setup, no prompt engineering required. Just type and ask.

1

Choose a Model

Pick from ChatGPT, Claude, Gemini, Perplexity or DeepSeek. Each is optimized for different tasks - Use our comparison table above to decide.

2

Ask Your Question

Type naturally. You don't need special syntax or prompts. Ask follow-up questions, paste code, share documents and continue the conversation.

3

Get Your Answer

Receive a detailed, accurate response in seconds. Copy it, refine it, or ask for a different format. Save conversations to continue later.

Common Questions About AI Chat

More answers in the Help Center: Can I switch AI models mid-conversation on AskAI.free? Can I use AskAI.free on my phone? What is Claude Sonnet 4 and how is it different from ChatGPT? ChatGPT 4o vs Claude Sonnet 4: which is better? Which AI model is best for coding? How many free questions do I get on AskAI.free?

Everything you need to know before you start.

It depends on your task. For complex reasoning and coding, Claude Opus 5 and ChatGPT 5.5 lead the field. For real-time web search with cited sources, Perplexity is unmatched. For fast everyday questions, Claude Haiku 4.5 and Gemini 2.0 Flash are the quickest.
Yes. You can ask your first question without an account. After that, a free account gives access to all models with a daily question limit. Pro and Max plans unlock unlimited questions, higher context windows and file upload support.
ChatGPT excels at multi-step instructions, tool use and code generation. Claude is known for longer context windows, careful instruction-following and nuanced writing. Both are top-tier - The best choice depends on your specific task.
Yes. Perplexity Search provides real-time web search with cited sources. It is ideal for current events, market research, fact-checking and any question where up-to-date information matters.
The context window is the maximum amount of text an AI can process in one conversation. Larger windows mean the AI can read and respond to longer documents. Claude Sonnet 4.6 supports 200K tokens, ChatGPT 4.1 supports 1M tokens - Enough for an entire codebase or book.
Yes. ChatGPT 5.5 and Claude Sonnet 5 can write complete functions, debug errors, explain code and convert between programming languages. Describe what you want in plain English and paste any relevant context or error messages.
Conversations are not shared with other users. We do not sell or share your data with third parties. See our Privacy Policy for full details. For sensitive business information, avoid pasting confidential data into any AI system.

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AI Image Tools AI Image Generator Compare AI Models AI Prompt Library Pricing AskAI.free FAQ

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No credit card. No download. Just type your question and get an answer from ChatGPT, Claude, Gemini or Perplexity in seconds.

ChatGPT 5