Cheapest xAI Models

Quick answer · Updated June 2026

The cheapest xAI model is Grok Build 0.1 at $1.00 per million input tokens. Grok 4.3 ($1.25) and Grok 4.20 Multi-Agent ($1.25) round out the top three.

$1.00Input /M

120 t/sSpeed

256KContext

AI models ranked by input token price. The most affordable large language model APIs, from budget open-weight models to discounted frontier models.

1X
grok-build-0.1
ReasoningToolsJSON+1120 t/s · 769ms ttft · 256K ctx
$1.00
Input /M
2X
grok-4.3
ReasoningToolsJSON+153.2 intel · 155 t/s · 670ms ttft
$1.25
Input /M
3X
grok-4.20-multi-agent
ReasoningJSONVision325 t/s · 11.5s ttft · 2M ctx
$1.25
Input /M
4X
grok-4.20
ReasoningToolsJSON+129.7 intel · 76 t/s · 691ms ttft
$1.25
Input /M

Frequently asked

What is the cheapest xAI model?

The cheapest xAI model is Grok Build 0.1 at $1.00 per million input tokens. Grok 4.3 ($1.25) and Grok 4.20 Multi-Agent ($1.25) round out the top three.

What's a good alternative to Grok Build 0.1?

Grok 4.3 ($1.25) is the closest alternative on this metric, followed by Grok 4.20 Multi-Agent ($1.25). See the full ranking above for the tradeoffs.

How many xAI models are there?

modelgrep tracks 4 xAI models with live benchmarks, speed, latency and per-provider pricing, led on intelligence by Grok 4.3. 4 of them qualify for this ranking.

More xAI rankings

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All rankings

Small & Fast LLMs Smartest LLMs Best LLMs for Coding Best LLMs for Design & Frontend Fastest LLMs Lowest-Latency LLMs Best Free LLMs Best Reasoning LLMs Best Vision LLMs Best LLMs for Agents Best Open-Source LLMs Longest-Context LLMs