Use xAI Models in Big-AGI.
Bring your own xAI key and use xAI at its own API rates, with no markup. Keys and chats stay in your browser. Run xAI in parallel with other models, then compare and merge the answers.
Running xAI in Big-AGI
Add your xAI API key and use Grok models at xAI's own API rates. Big-AGI adds no markup and keeps your keys and chats in your browser, not on its servers.
- Your key, your billing. Usage is billed by xAI to your account. Big-AGI does not meter or charge for model usage.
- Direct Connection. Turn it on and the browser calls xAI directly, bypassing the Big-AGI server, when your key is client-side and xAI allows it.
- Grok with tools. Use Grok for chat, tool calling, and vision where the model supports it.
- Beam. Run Grok in parallel with other models, then compare or merge the answers. Parallel runs use more tokens than a single chat.
All supported xAI models
Grok Build 0.1
NEWGrok Build 0.1 is xAI’s fast coding model trained specifically for agentic software engineering workflows. It supports text and image inputs with text output, and is optimized for interactive coding...
256K
$1
$2
May 2026
Grok 4.3
Grok 4.3 is a reasoning model from xAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...
1M
$1.25
$2.5
Apr 2026
Grok 4.20
Grok 4.20 is a reasoning model from xAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...
2M
$1.25
$2.5
Mar 2026
Grok 4.20 Multi-Agent
Grok 4.20 Multi-Agent is a variant of xAI’s Grok 4.20 designed for collaborative, agent-based workflows. Multiple agents operate in parallel to conduct deep research, coordinate tool use, and synthesize information...
2M
$1.25
$2.5
Mar 2026
Grok Build 0.1
NEWGrok Build 0.1 is xAI’s fast coding model trained specifically for agentic software engineering workflows. It supports text and image inputs with text output, and is optimized for interactive coding...
Grok 4.3
Grok 4.3 is a reasoning model from xAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...
Grok 4.20
Grok 4.20 is a reasoning model from xAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...
Grok 4.20 Multi-Agent
Grok 4.20 Multi-Agent is a variant of xAI’s Grok 4.20 designed for collaborative, agent-based workflows. Multiple agents operate in parallel to conduct deep research, coordinate tool use, and synthesize information...
Bring your xAI key. Keep control.
Your key, your data, your choice of model. Big-AGI is open source and self-hostable, so you can check exactly how xAI is called.
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