Grok Build 0.1

x-ai/grok-build-0.1-20260520

xAI: Grok Build 0.1, released by x‑ai on 2026‑05‑20, processes text, image, and file inputs and generates text output. It supports tool usage and reasoning, operates with a context window of 256 000 tokens, and is priced at $1 per million input tokens and $2 per million output tokens. The model is not open‑weight.

  • tool use
  • structured outputs
  • reasoning

At a glance

providerx-ai
releasedApr 16, 2026
context256K
input / M$1

Specifications

What the API gives you

Context window
256K tokens
Max output
230K tokens
Input price
$1 / 1M tokens
Output price
$2 / 1M tokens
Cache read
$0.20 / 1M tokens
Modalities
text, image, file → text
Knowledge cutoff
—
Released
Apr 16, 2026

Measured evidence

Public benchmark record

LiveBench Agentic Coding
45.8%2026-06-25
LiveBench Coding
65.4%2026-06-25
LiveBench Data Analysis
70.8%2026-06-25
LiveBench Instruction Following
65.2%2026-06-25
LiveBench Language
72.5%2026-06-25
LiveBench Math
78.4%2026-06-25
LiveBench Reasoning
76.4%2026-06-25
LMArena Agent
-8.22026-07-13
LMArena Agent
-7.62026-07-20
LMArena Agent
-82026-07-27
LMArena Agent
-82026-07-21
LMArena Agent
-82026-07-28
LMArena Agent
-8.42026-08-03
LMArena Agent
-92026-08-12
LMArena Agent
-9.12026-08-13
LMArena Agent
-8.82026-08-06
LMArena Agent
-92026-08-11
LMArena Agent
-9.42026-08-24
LMArena Agent
-11.32026-08-31
LMArena Agent
-12.92026-09-05
LMArena Agent
-10.12026-08-27

LMArena data licensed CC-BY-4.0. Aider (Apache-2.0) and SWE-bench (MIT) are open. Design Arena uses blind human preference.

Task evidence

How broad is the support?

Each status is exact to this model version and the selected task. Official release claims remain provisional.

  • Best LLM for Competition MathProvisional evidence

    65% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Instruction Following or LMArena Math. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Math & ReasoningProvisional evidence

    65% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Instruction Following or LMArena Math. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Logic & Problem SolvingProvisional evidence

    60% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Instruction Following or LMArena Math. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for a General AssistantProvisional evidence

    55% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Instruction Following or LMArena Text. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Code CompletionProvisional evidence

    50% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Aider Polyglot or LMArena WebDev. 4 of 4 configured evaluation feeds currently have results.

  • Best LLM for Creative WritingProvisional evidence

    50% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Creative Writing or LMArena Text. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for WritingProvisional evidence

    50% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Creative Writing or LMArena Text. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Fast SummariesProvisional evidence

    50% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or Route reliability. 3 of 4 configured evaluation feeds currently have results.

  • Best Value LLMProvisional evidence

    43% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or Route reliability. 3 of 4 configured evaluation feeds currently have results.

  • Best Cheap LLM for High VolumeProvisional evidence

    42% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or Route reliability. 3 of 4 configured evaluation feeds currently have results.

  • Cheapest Capable LLMProvisional evidence

    42% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or Route reliability. 3 of 4 configured evaluation feeds currently have results.

  • Best Open-Weight LLM for Self-HostingProvisional evidence

    42% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or Route reliability. 3 of 4 configured evaluation feeds currently have results.

  • Best LLM for Literary TranslationProvisional evidence

    40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or WMT translation. 4 of 5 configured evaluation feeds currently have results.

  • Best LLM for Everyday TranslationProvisional evidence

    40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or WMT translation. 4 of 5 configured evaluation feeds currently have results.

  • Best LLM for TranslationProvisional evidence

    40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or WMT translation. 4 of 5 configured evaluation feeds currently have results.

  • Best LLM for Business WritingProvisional evidence

    40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Creative Writing or LMArena Instruction Following. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Marketing CopyProvisional evidence

    40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Creative Writing or LMArena Instruction Following. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Chat & RoleplayProvisional evidence

    40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Creative Writing or LMArena Text. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Roleplay & CharacterProvisional evidence

    40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Creative Writing or LMArena Text. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Hermes AgentProvisional evidence

    33% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or SWE-rebench. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for OpenHandsProvisional evidence

    33% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or SWE-rebench. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for GooseProvisional evidence

    33% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or SWE-rebench. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for OpenClawProvisional evidence

    33% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or SWE-rebench. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for High-Volume ExtractionProvisional evidence

    31% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Route reliability or Structured-output eval. 2 of 4 configured evaluation feeds currently have results.

  • Best LLM for Document SummarizationProvisional evidence

    30% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from FACTS Grounding or LMArena Document. 4 of 6 configured evaluation feeds currently have results.

  • Best LLM for SummarizationProvisional evidence

    30% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from FACTS Grounding or LMArena Document. 4 of 6 configured evaluation feeds currently have results.

  • Best Local LLM for CodingProvisional evidence

    30% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Aider Polyglot or LMArena WebDev. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Agentic CodingProvisional evidence

    28% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Design Arena Full-stack or Design Arena Web-apps. 8 of 8 configured evaluation feeds currently have results.

  • Best LLM for JSON & Schema OutputProvisional evidence

    28% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Text. 4 of 5 configured evaluation feeds currently have results.

  • Best LLM for Structured Data ExtractionProvisional evidence

    28% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Text. 4 of 5 configured evaluation feeds currently have results.

  • Best LLM for AI AgentsProvisional evidence

    27% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Berkeley Function Calling or OSWorld Verified. 7 of 7 configured evaluation feeds currently have results.

  • Best LLM for CodingProvisional evidence

    26% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Aider Polyglot or Design Arena Coding. 8 of 8 configured evaluation feeds currently have results.

  • Best LLM for Debugging & Code ReviewProvisional evidence

    25% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Aider Polyglot or LMArena WebDev. 6 of 6 configured evaluation feeds currently have results.

  • Best LLM for Tool & Function CallingProvisional evidence

    25% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Search. 4 of 5 configured evaluation feeds currently have results.

  • Best LLM for Autonomous AgentsProvisional evidence

    25% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Frontier-Bench or OSWorld Verified. 7 of 7 configured evaluation feeds currently have results.

  • Best LLM for Computer & Browser UseProvisional evidence

    25% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or OSWorld Verified. 4 of 4 configured evaluation feeds currently have results.

  • Best LLM for Image UnderstandingProvisional evidence

    20% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Vision or VLMEvalKit tasks. 3 of 4 configured evaluation feeds currently have results.

  • Best LLM for OCR & DocumentsProvisional evidence

    10% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from LMArena Document or LMArena Vision. 3 of 5 configured evaluation feeds currently have results.

  • Best LLM for Frontend & UIProvisional evidence

    10% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Design Arena Coding or Design Arena UI. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Vision & DocumentsProvisional evidence

    10% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from LMArena Document or LMArena Vision. 3 of 5 configured evaluation feeds currently have results.

  • Best LLM for Grounded RAGProvisional evidence

    10% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from CRAG or FACTS Grounding. 2 of 5 configured evaluation feeds currently have results.

  • Best LLM for Charts & DiagramsProvisional evidence

    10% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from LMArena Document or LMArena Vision. 3 of 5 configured evaluation feeds currently have results.

  • Best LLM for Document ParsingProvisional evidence

    10% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from LMArena Document or LMArena Vision. 3 of 5 configured evaluation feeds currently have results.

  • Best LLM for Massive ContextProvisional evidence

    6% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from LMArena Document or LMArena Long Query. 3 of 4 configured evaluation feeds currently have results.

  • Best LLM for RAG & Long ContextProvisional evidence

    6% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from FACTS Grounding or LMArena Document. 4 of 6 configured evaluation feeds currently have results.

Recommendation coverage

Where this model appears

Not currently included in a published recommendation. The task evidence panel above says exactly what is confirmed and what is still missing.

Catalog data via OpenRouter and models.dev. Last checked within the past 6 hours.