Grok

xAI: grok-build-0.1:free

grok-build-0.1:free
256K contextReasoningToolsVisionFilesCacheStructured
Released May 20, 2026Updated May 20, 2026

Grok 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 agents, tool use, and multi-step development tasks. The model powers xAI’s Grok Build CLI and features a 256K context window with no text output limit, making it well suited for long-horizon coding and automation workflows. Currently in early access.

Tokenizer Grok

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Pricing

Input price
$0.00/ 1M tokens
Output price
$0.00/ 1M tokens
Context window 256K tokensCompatible endpoints openaiVendor xAI

Performance

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Usage & Ranking

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Supported parameters

All providers = every upstream serving this model supports it. Some providers = depends on which upstream handles the request. Default = the value sent when you leave the parameter unset.

ParameterProvidersDefault
frequency_penaltyAll providersNot sent by default
include_reasoningAll providers-
logprobsAll providers-
max_tokensAll providers-
presence_penaltyAll providersNot sent by default
reasoningAll providers-
repetition_penaltySome providersNot sent by default
response_formatAll providers-
seedAll providers-
stopAll providers-
structured_outputsAll providers-
temperatureAll providersNot sent by default
tool_choiceAll providers-
toolsAll providers-
top_kSome providersNot sent by default
top_logprobsAll providers-
top_pAll providersNot sent by default

Frequently asked questions

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