The World's Best Free AI.
Free & Unlimited with Puter.

The World's Best Free AI. No guest accounts, no credit card requirements, and no subscriptions. Log in with your Puter account for free unmetered intelligence across GPT-6 Astra, GPT-4o, Claude Sonnet & Opus, DeepSeek, Grok, Gemini, and 20 verified frontier architectures.

Included Models

Free and unlimited forever with instant access

Unlimited

GPT-4o Mini

Fast & Lightweight • OpenAI

Instant, ultra-low latency intelligence with exceptional instruction-following for coding and quick tasks.

Speed: 175 t/s Context: 128k

Paid

GPT-6 Astra

OpenAI Next-Gen Flagship • OpenAI

Next-generation OpenAI frontier intelligence with 1M context window and profound cognitive synthesis.

Speed: 95 t/s Context: 1M

Paid

GPT-4o

Omni Flagship • OpenAI

Premier multimodal flagship architecture. Excels at complex coding, reasoning, and visual understanding.

Speed: 125 t/s Context: 128k

Paid

GPT-5 Mini

Next-Gen Reasoning Engine • OpenAI

Next-generation reasoning architecture engineered for algorithmic derivation and multi-step logic.

Speed: 115 t/s Context: 128k

Paid

GPT-5

Frontier Flagship • OpenAI

Maximum capability frontier intelligence with 256k context for profound synthesis and complex tasks.

Speed: 90 t/s Context: 256k

Paid

Claude Sonnet 4.6

Code & System Architect • Anthropic

World-class coding engine and architectural synthesizer with nuanced conversational comprehension.

Speed: 120 t/s Context: 200k

Paid

Claude Opus 4.6

Deep Reasoning & Logic • Anthropic

Unmatched cognitive depth for difficult mathematics, science, and intricate code analysis.

Speed: 85 t/s Context: 200k

Paid

Claude Opus 5

Frontier Cognitive Model • Anthropic

Next-generation frontier cognitive depth designed for profound document synthesis and novel derivations.

Speed: 80 t/s Context: 200k

Unlimited

DeepSeek V4.1 Flash

Ultra-Fast Reasoning • DeepSeek

Blazing inference throughput with state-of-the-art coding and algorithmic problem solving.

Speed: 185 t/s Context: 128k

Paid

DeepSeek V4 Pro

Frontier Mixture-of-Experts • DeepSeek

Massive mixture-of-experts model optimized for deep algorithmic derivations and complex code generation.

Speed: 110 t/s Context: 128k

Unlimited

Codestral

Dedicated Code Engine • Mistral AI

Engineered exclusively for programming, debugging, refactoring, and single-file web app creation.

Speed: 140 t/s Context: 128k

Unlimited

Mistral Large 3

Frontier European AI • Mistral AI

Top-tier multilingual comprehension, reasoning, and synthesis with balanced inference latency.

Speed: 115 t/s Context: 128k

Paid

Mistral Large 4

Flagship Reasoning Engine • Mistral AI

Next-gen European frontier architecture with deep document understanding and 256k context window.

Speed: 95 t/s Context: 256k

Paid

Grok 4.5

Frontier Real-Time Engine • xAI

High-speed frontier intelligence with direct, truthful reasoning and extensive world knowledge.

Speed: 155 t/s Context: 128k

Paid

Grok 4.6

Maximum Throughput & Context • xAI

Massive 256k context comprehension and rapid coding synthesis powered by xAI.

Speed: 130 t/s Context: 256k

Unlimited

Gemini 2.5 Flash

Instant Multimodal Speed • Google

Instant inference with massive 1M token context and native multimodal image and document understanding.

Speed: 195 t/s Context: 1M

Paid

Gemini 2.5 Pro

Multimodal Frontier • Google

State-of-the-art multimodal reasoning across huge repositories, books, and complex problem sets.

Speed: 105 t/s Context: 2M

Unlimited

Llama 3.3 70B

Open Frontier Leader • Meta

Industry-standard open weights model with premier instruction following, logic, and code generation.

Speed: 125 t/s Context: 128k

Paid

Qwen Max

Alibaba Flagship Reasoning • Alibaba

Premier reasoning, mathematics, coding, and multilingual knowledge from Alibaba.

Speed: 110 t/s Context: 128k

Unlimited

Qwen Plus

Balanced Multilingual Speed • Alibaba

High-performance conversational and coding intelligence with rapid response latency.

Speed: 150 t/s Context: 128k

And Many More Frontier Architectures Continuously Added.

Coming Soon Wall

We might be adding these models within this month:

Active Expansion Pipeline

Atherium AI vs. The Industry

Why creators and engineers are switching away from paid subscriptions

Feature	Atherium AI	ChatGPT Plus	Claude Pro	Copilot Pro
Monthly Cost	$0.00 Forever	$20.00 / mo	$20.00 / mo	$20.00 / mo
Rate Limits & Message Caps	Zero Caps (Unlimited)	40 msgs / 3 hours	Strict daily quotas	Throttle after limit
Multi-Model Selection	20 Frontier Models (OpenAI Astra, Mistral, xAI, etc.)	OpenAI only	Anthropic only	Microsoft only
Permanent Neural Memory	Included & Private	Limited	Limited Projects	Basic
Credit Card Required	Never (100% Free)	Required	Required	Required
Data Monetization / Prompt Selling	Never (Strict Privacy)	Opt-out required	Commercialized	Commercialized

Frequently Asked Questions

Everything you need to know about Atherium AI