Grok Build 0.1: price, context window and capabilities
Grok Build 0.1 is a model from xAI (x-ai/grok-build-0.1). It supports reasoning. It supports tool use. It costs $1.00 per million input tokens and $2.00 per million output tokens, with a 256K-token context window.
What it costs in practice
Using the listed prices: a chat turn of 2,000 input and 500 output tokens costs about $0.0030, so 10,000 such turns cost about $30.00. Summarising a 100,000-token document into 2,000 tokens costs about $0.104. A long agent run that reads 1 million tokens and writes 50,000 costs about $1.10.
How it compares
Among the 40 models we track, Grok Build 0.1 ranks #26 by input price and #15 by output price (1 is cheapest), and #38 by context window (1 is largest). Models with the same tool and reasoning support that cost less per output token: DeepSeek V4 Pro 0423 ($0.418), Qwen3.8 Omni Flash ($0.470), Qwen3.8 Flash ($0.470), GPT-6 Luna Pro ($0.500). Models with a larger context window at the same or lower output price: Llama 4 Scout (1.3M), GPT-6 Luna Pro (1.1M), GPT-6 Luna (1.1M), Llama 4 Maverick (1.0M).
More from xAI
- Grok 4.7: $2.00 in / $6.00 out, 500K context
- Grok 4.6: $2.00 in / $6.00 out, 500K context
- Grok 4.5: $2.00 in / $6.00 out, 500K context
Prices and limits come from OpenRouter's public model catalogue, last synced 4 Oct 2026. Provider pricing can differ from OpenRouter's and changes often; confirm on the provider's own page before you commit. See the guide to choosing a model or the full comparison.
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