Every AI model on Tusk Central AI
One chat, 49+ leading models from the providers behind ChatGPT, Grok, Claude, Gemini, and more. Most everyday use is free and unlimited. A number of deep-thinking models run on monthly free credits, then simple pay-as-you-go.
What the labels mean
Free Unlimited Use as much as you want, no daily caps or timeouts. Supported by privacy-respecting ads.
Uses Credits Deep-thinking models. You get generous free credits each month, then pay only for what you use beyond that. No subscription.
Not sure which to pick? Brainiac — one option among many in the model list — chooses for you automatically. See how it works →
Model list last updated 28 July 2026. New additions marked NEW. 49 models total.
Anthropic
| Model | Access |
|---|
| Claude Haiku 4.5 | Free Unlimited |
| Claude Sonnet 4.6 | Uses Credits |
| Claude Opus 4.8 NEW | Uses Credits |
| Claude Fable 5 NEW | Uses Credits |
| Claude Sonnet 5 NEW | Uses Credits |
| Claude Opus 5 NEW | Uses Credits |
OpenAI
| Model | Access |
|---|
| GPT-4o mini | Free Unlimited |
| GPT-5 Nano | Free Unlimited |
| GPT-5.4 | Uses Credits |
| GPT-5.4 Mini | Free Unlimited |
| GPT-5.4 Nano | Free Unlimited |
| GPT-5.5 | Uses Credits |
| gpt-oss-120b | Free Unlimited |
| gpt-oss-20b | Free Unlimited |
| GPT-5.6 Luna NEW | Uses Credits |
| GPT-5.6 Luna Pro NEW | Uses Credits |
| GPT-5.6 Terra NEW | Uses Credits |
| GPT-5.6 Terra Pro NEW | Uses Credits |
| GPT-5.6 Sol NEW | Uses Credits |
| GPT-5.6 Sol Pro NEW | Uses Credits |
Google
| Model | Access |
|---|
| Gemini 3.1 Flash Lite | Free Unlimited |
| Gemini 3.1 Pro Preview | Uses Credits |
| Gemini 3.5 Flash | Uses Credits |
| Gemini 3.6 Flash NEW | Uses Credits |
| Gemini 3.5 Flash Lite NEW | Free Unlimited |
xAI
| Model | Access |
|---|
| Grok 4.3 | Free Unlimited |
| Grok 4.5 NEW | Uses Credits |
Z.ai
| Model | Access |
|---|
| GLM 5.2 NEW | Free Unlimited |
MiniMax
| Model | Access |
|---|
| MiniMax M2 | Free Unlimited |
| MiniMax M2.7 | Free Unlimited |
| MiniMax M3 NEW | Free Unlimited |
NVIDIA
| Model | Access |
|---|
| Nemotron 3 Ultra NEW | Free Unlimited |
MoonshotAI
| Model | Access |
|---|
| Kimi K2 Thinking | Free Unlimited |
| Kimi K2.5 | Free Unlimited |
| Kimi K2.6 | Free Unlimited |
| Kimi K3 NEW | Uses Credits |
Thinking Machines
| Model | Access |
|---|
| Inkling NEW | Free Unlimited |
Meta
| Model | Access |
|---|
| Llama 4 Maverick | Free Unlimited |
| Llama 4 Scout | Free Unlimited |
| Muse Spark 1.1 NEW | Uses Credits |
DeepSeek
| Model | Access |
|---|
| DeepSeek V3.2 | Free Unlimited |
| DeepSeek V4 Pro | Free Unlimited |
Cohere
| Model | Access |
|---|
| Command R7B | Free Unlimited |
Mistral
| Model | Access |
|---|
| Mistral Small 3.2 24B | Free Unlimited |
| Mistral Small 4 | Free Unlimited |
Perplexity
| Model | Access |
|---|
| Sonar | Free Unlimited |
| Sonar Deep Research | Uses Credits |
| Sonar Pro | Uses Credits |
Cohere
| Model | Access |
|---|
| Command R7B | Free Unlimited |
OpenRouter
| Model | Access |
|---|
| Brainiac | Free Unlimited |
Model guides
Want detail on a specific model — what it's good at, whether it's free, and how to get the best results? These guides go deeper:
ChatGPT ·
Claude ·
Gemini ·
Grok ·
DeepSeek ·
Perplexity Sonar ·
GLM 5.2 ·
Nemotron 3 Ultra ·
Inkling ·
Muse Spark 1.1
Compare all the free models →
Which model should I use?
Most everyday tasks — writing, quick research, coding help, brainstorming — are handled well by the free, unlimited fast-reasoning models. Reach for a deep-thinking model when a problem needs more multi-step reasoning: advanced math, intricate logic, or nuanced, high-stakes decisions. If you'd rather not choose, Brainiac will pick for you automatically.
Start chatting →
