xAI (Grok)

xAI's Grok family covers general reasoning, specialized coding, and dedicated agentic workflows. The default model, grok-build-0.1, is a coding-agent model with a 256k context window trained specifically for agentic tasks — a strong fit for Scira's combined research and code mode.

Get a key

Create an xAI account

Go to console.x.ai and sign up. API access requires a paid plan.

Open API Keys

In the xAI console sidebar, click API Keys → Create API Key. Copy the key — it starts with xai-.

Add the key to Scira

scira init
# or manually:
echo "XAI_API_KEY=xai-..." >> ~/.scira/.env

Configure

~/.scira/config.json

{
  "llmProvider": "xai",
  "model": "grok-build-0.1"
}

Switch from the TUI with /llm → xAI, then /model to pick a different model.

Available models

The /model picker fetches the live list from api.x.ai/v1/models. Fallback static list:

Model ID	Description
`grok-build-0.1`	Default. Specialized coding-agent model with 256k context, designed for agentic workflows
`grok-4.3`	Current general flagship — highest intelligence, full tool use
`grok-4.20`	High-performance variant — lowest hallucination rate and fast agentic tool calling
`grok-4.20-reasoning`	Reasoning-mode variant of Grok 4.20
`grok-4-0709`	Specific dated release of Grok 4
`grok-3`	Previous generation general model
`grok-3-mini`	Smaller, faster, lower cost

All Grok models support function calling. See docs.x.ai/developers/models for the full current list.

Grok via AI Gateway

If you already have a Vercel AI Gateway key, you can also run Grok through the gateway provider using model IDs like xai/grok-4.3 — no separate XAI_API_KEY needed.

Pricing

See console.x.ai for current per-token rates. Grok Build 0.1 and Grok 3 Mini are the most cost-effective options for high-volume research runs.