xAI models
5models tracked · ranked by intelligence, speed & price
Match · Updated July 2026
xAI's smartest model is Grok 4.5 (53.8 on the Intelligence Index), and its cheapest is Grok Build 0.1 at $1.00 per million input tokens. All 5 xAI models are compared below by intelligence, speed, latency, context and price.
Smartest xAIFastest xAICheapest xAISmall & fast xAIxAI for codingxAI reasoningxAI for designxAI for agents
Smartest
53.8
x-ai/grok-4.5
Fastest
—
Cheapest
$1.00/M
x-ai/grok-build-0.1
| Model | Intel | Speed | Latency | In $/M | Context |
|---|---|---|---|---|---|
| grok-4.5 ReasoningToolsJSON+1 | 53.8 | — | — | $2.00 | 500K |
| grok-4.3 ReasoningToolsJSON+1 | 37.6 | — | — | $1.25 | 1M |
| grok-4.20 ReasoningToolsJSON+1 | 37.0 | — | — | $1.25 | 2M |
| grok-build-0.1 ReasoningToolsJSON+1 | — | — | — | $1.00 | 256K |
| grok-4.20-multi-agent ReasoningJSONVision | — | — | — | $1.25 | 2M |