xAI · Model
Grok Build 0.1 pricing, context window and specs
Grok Build 0.1 costs $1 per million input tokens and $2 per million output tokens, and reads up to 256,000 tokens per request. By blended price it is the cheapest of xAI’s 2 current models here.
- Input / 1M
- $1
- Output / 1M
- $2
- Cached / 1M
- $0.20
- Context
- 256,000
- Max output
- Not published
- Released
- 2026-05-20
Estimate your cost with Grok Build 0.1Compare all xAI modelsCount tokens for Grok Build 0.1
Pricing
Grok Build 0.1 API pricing
| Price per 1M tokens | Input | Output |
|---|---|---|
| Standard | $1 | $2 |
| Cached input (read) | $0.20 | – |
| Prompts of 200,000+ tokens | $2 | $4 |
Output costs 2.0× the input price, so long replies drive the bill more than long prompts. If your requests share a long fixed prefix, such as a system prompt or tool definitions, caching cuts that part to 20% of the normal input price. Once a single prompt reaches 200,000 tokens, the whole request is billed at the higher long-context rate shown above.
Examples
What Grok Build 0.1 costs in practice
| Workload | Tokens in / out | Requests/day | Per request | Per month |
|---|---|---|---|---|
| Support chatbot50% cached | 1,500 / 400 | 1,000 | $0.0017 | $51.71 |
| RAG app20% cached | 6,000 / 500 | 500 | $0.00604 | $91.86 |
| Coding agent80% cached | 40,000 / 2,000 | 200 | $0.0184 | $111.93 |
| Document summariser | 8,000 / 600 | 300 | $0.0092 | $83.95 |
Change any number in the cost calculator.
Context
Context window
Grok Build 0.1 accepts up to 256,000 tokens per request, roughly 192,000 English words or 384 pages. That budget is shared between your prompt and the reply, and no separate cap on the reply is published.
Filling the whole window with one prompt costs about $0.51 at list price, so for repeated long-document work, retrieval (sending only the relevant parts) or prompt caching is usually much cheaper.
Features
Capabilities
- Image input
- Yes
- Tool / function calling
- Yes
- Reasoning mode
- Yes
- Prompt caching
- Yes
- Structured output
- Yes
- Open weights
- No
- Accepts
- text, image, file
- Knowledge cutoff
- Not published
As declared by the provider’s API. It shows a feature exists, not how well it works.
API
Grok Build 0.1 model ID
- OpenRouter
x-ai/grok-build-0.1- xAI API
grok-build-0.1(alias)grok-code-fast-1(redirect)grok-code-fast(redirect)
xAI lists Grok Build 0.1 as current. Every Grok model ID, with aliases and snapshots.
xAI
Where Grok Build 0.1 sits in xAI’s line-up
Ranked by blended price (three parts input to one part output, $1.25 per 1M for Grok Build 0.1), it is the cheapest of xAI’s 2 current models here. One step up, Grok 4.7 costs $3 (2.4× as much). Unlike Grok Build 0.1, it reads up to 500,000 tokens (256,000 here). See every xAI model and price
| Model | Input / 1M | Output / 1M | Context | Released |
|---|---|---|---|---|
| Grok Build 0.1 (this page) | $1 | $2 | 256,000 | 2026-05-20 |
| Grok 4.7 | $2 | $6 | 500,000 | 2026-09-21 |
xAI’s current models with a page here, cheapest first. Older and superseded models are listed on the provider page and in the comparison table.
Save
Cheaper alternatives
- Seed 1.6 FlashByteDance Seed90% cheaper
- Gemma 4 31BGoogle88% cheaper
- GPT-6 LunaOpenAI84% cheaper
- Claude Haiku 5.5Anthropic84% cheaper
- Qwen3.8 Omni FlashQwen82% cheaper
Current models from major providers, one per provider, that keep image input, tool calling, a reasoning mode, a usable context window and output limit. Compared by blended price.
Compare
Similarly priced models
- Qwen3.5 397B A17BQwen$0.55 / $3.50
- Kimi K2.7 CodeMoonshot AI$0.6712 / $3.35
- Seed-2.0-CodeByteDance Seed$0.50 / $3
- Nemotron 3 UltraNVIDIA$0.60 / $2.40
- Gemini 3.8 FlashGoogle$0.75 / $3.75
Current models from other major providers, closest blended price.
FAQ
Grok Build 0.1 questions
How much does Grok Build 0.1 cost?
Grok Build 0.1 costs $1 per million input tokens and $2 per million output tokens, with cached input at $0.20. A typical chatbot reply (1,500 tokens in, 400 out) costs about $0.0023. Use the LLM cost calculator for your own workload.
What is Grok Build 0.1’s context window?
256,000 tokens, about 192,000 English words or 384 printed pages, shared between your prompt and the reply. No separate limit on the reply is published, so the window is the limit.
Does Grok Build 0.1 support prompt caching and batch requests?
Yes, cached input is billed at $0.20 per million tokens (20% of the normal input price). No batch price is published for it.
What are cheaper alternatives to Grok Build 0.1?
With the same essentials (image input and tool calling), the cheapest options are Seed 1.6 Flash (90% cheaper), Gemma 4 31B (88% cheaper), GPT-6 Luna (84% cheaper). Cheaper doesn’t mean equivalent, so test them on your own prompts.
What is the API model ID for Grok Build 0.1?
On OpenRouter it is x-ai/grok-build-0.1. In xAI’s own API, use grok-build-0.1; xAI lists the model as current. The Grok model ID list has every alias and snapshot. Pass the ID as the model value in each request.
Is Grok Build 0.1 open source?
No, Grok Build 0.1 is only available through xAI’s API and partners; its weights aren’t published.