Grok Build 0.1
xAI's agentic coding model purpose-built for terminal-based software engineering with always-on reasoning, vision, and tool use.
Overview
What is Grok Build 0.1
Grok Build 0.1 is xAI's agentic coding model, released in May 2026 as the engine behind the Grok Build CLI. Designed for autonomous software engineering, it supports vision, function calling, reasoning, and web search within a 256K-token context window, optimized for multi-step development tasks.
Running it privately on Venice
On Venice, Grok Build 0.1 runs with zero retention — your code, prompts, and tool interactions are never stored or profiled. This ensures full sovereignty over sensitive development workflows while retaining full access to vision, reasoning, and web-connected capabilities. Run it privately without sacrificing performance or tooling.
Assessment
Strengths and limitations
- Purpose-built for agentic coding workflows: excels at tool use, multi-file edits, and structured outputs.
- Supports vision input, enabling it to interpret diagrams, UI mockups, and error screenshots.
- Always-on reasoning ensures deep analysis for complex engineering tasks without user configuration.
- Highly cost-efficient at $1/$2 per million input/output tokens, with cached input at $0.20/1M.
- Integrates seamlessly with existing skills, plugins, MCP servers, and hooks via open-sourced CLI.
- Proprietary model: cannot be self-hosted or fine-tuned.
- Smaller 256K context window compared to rivals like Claude Fable 5 (1M).
- Reported accuracy (~70.8% on SWE-bench Verified) lags behind top-tier models like Claude Opus 5.
Capabilities
What it supports
- Tool use / function calling
- Vision (image input)
- Reasoning
- Web search
- Code-optimized
- Structured output (JSON schema)
- Audio input
- Video input
- Multiple image inputs
- Log probabilities
Specifications
Datasheet
- Maker
- xAI
- Released
- May 14, 2026
- Architecture
- Reasoning model with always-on chain-of-thought
- Parameters
- Not disclosed
- Open weights
- No
- Context window
- 256K tokens
- Max output
- 65.536K tokens
- Capabilities
- Vision, Function calling, Reasoning, Web search, Code-optimized
- Privacy on Venice
- Private — zero retention
- Available on Venice since
- May 2026
- License
- Proprietary
API
Call it from your code
Venice exposes an OpenAI-compatible API. Point your base URL at Venice and pass the model id.
curl https://api.venice.ai/api/v1/chat/completions \
-H "Authorization: Bearer $VENICE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "grok-build-0-1",
"messages": [{ "role": "user", "content": "Explain quantum tunneling simply." }]
}'Pricing
What it costs on Venice
Billed per token on Venice: $1 per 1M input tokens and $2 per 1M output tokens.
New Venice accounts include a free daily allowance and 500 welcome credits — no credit card required.
Alternatives
How it compares
| Model | Max context | Price (in/out per 1M) | Open weights | Best for |
|---|---|---|---|---|
| Grok Build 0.1 | 256K tokens | $1 in · $2 out / 1M | No | Cost-efficient agentic coding |
| Claude Opus 5 | 1M tokens | $6 in · $30 out / 1M | No | High-accuracy reasoning |
| DeepSeek V4 Flash 0731 | 1M tokens | $0.17 in · $0.35 out / 1M | No | Low-latency inference |
| GLM 5.1 | 200K tokens | $1.10 in · $4.15 out / 1M | Yes | Open-weight workflows |
Fast, low-cost coding agent with vision and always-on reasoning.
Use cases
What it is good for
- 01Autonomous code refactoring and debugging in terminal environments.
- 02CI/CD pipeline automation using headless Grok Build agents.
- 03Interactive development via TUI with approval-based plan execution.
- 04Processing visual code artifacts like architecture diagrams or UI wireframes.
- 05Orchestrating multi-tool workflows using MCP servers and plugins.
Prompting
Getting better results
Use plan mode for complex tasks to review and approve steps before execution.
Include screenshots of errors or UIs to leverage vision capabilities.
Leverage structured outputs for reliable parsing in agent loops.
Use cached context for repeated prompts to reduce cost and latency.
Version history
Predecessor model for coding tasks.
Current — agentic coding agent with CLI and vision support.
FAQ
Frequently asked questions
Grok Build 0.1 is xAI's agentic coding model, launched in May 2026 as the engine behind the Grok Build CLI. It's designed for autonomous software engineering with vision, tool use, and always-on reasoning in a 256K context window.
On Venice, it costs $1 per million input tokens and $2 per million output tokens, with cached input at $0.20 per million. Pricing is usage-based with no subscription required.
The model is proprietary and not open source, but the Grok Build CLI is open-sourced. You can use the model via API with pay-per-use pricing, but cannot self-host the model weights.
Yes, Grok Build 0.1 accepts image inputs, allowing it to interpret diagrams, UI mockups, and error screenshots as part of coding workflows.
Yes, it natively supports function calling, tool use, and structured outputs, making it ideal for agentic workflows that involve code editing, testing, and external API orchestration.
Grok Build 0.1 is more cost-efficient and tailored for coding agents, while Claude Opus 5 offers higher accuracy and a larger 1M context. Choose Grok for budget-conscious engineering workflows, Opus for maximum precision.
Yes. On Venice, Grok Build 0.1 runs with zero retention — your prompts, code, and interactions are never stored or used for training, ensuring full privacy and sovereignty.
Run Grok Build 0.1 privately
No prompt logging. No data used for training.