As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/m/grok-build-0-1/

# Grok Build 0.1

xAI, Grok Build family. Status: current. Type: code model. Released: 2026-05.

## How to call it

| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| xAI API | `grok-build-0.1` | https://api.x.ai/v1/chat/completions | https://docs.x.ai/docs/models/grok-build-0.1 |
| OpenRouter | `x-ai/grok-build-0.1` |  | https://openrouter.ai/x-ai/grok-build-0.1 |

## Pricing

- Input: $1 per 1M tokens
- Cached input: $0.20 per 1M tokens
- Output: $2 per 1M tokens
- Input, prompts over 200K tokens: $2 per 1M tokens
- Output, prompts over 200K tokens: $4 per 1M tokens
- Unit as published: per 1M tokens (USD)
- Source: https://docs.x.ai/docs/models/grok-build-0.1
- Last checked: 2026-09-29

## Specs

- Input: text, image
- Output: text
- Context window: 256,000 tokens
- Max output: not published
- Open weights: no
- Licence: proprietary

## Where it stands

- Newer code models in the registry since its release: 4:
  - Recursive Flint (2026-10-21) https://postcutoff.com/m/recursive-flint/
  - Mellum2.1 12B-A2.5B Thinking (2026-10-08) https://postcutoff.com/m/mellum2-1/
  - Leanstral 1.5 (2026-07-02) https://postcutoff.com/m/leanstral-1-5/
  - Kimi K2.7 Code (2026-06) https://postcutoff.com/m/kimi-k2-7-code/
- Closed weights; access is hosted only.

## What stands out

- Agentic coding model: Reasoning model tuned for agentic software engineering and workflow tasks; powers xAI's Grok Build coding agent. Source: https://docs.x.ai/docs/models/grok-build-0.1
- Low-cost coding tier: $1/$2 per 1M tokens with 256K context - cheapest current Grok text model. Source: https://docs.x.ai/docs/models

## Notes

xAI coding model (successor to grok-code-fast line). Release month from OpenRouter listing (2026-05-20); exact date not verified.

Use for coding agents, IDE integrations and repo-level edits.

```bash
curl https://api.x.ai/v1/chat/completions -H "Authorization: Bearer $XAI_API_KEY" -H "Content-Type: application/json" \
 -d '{"model":"grok-build-0.1","messages":[{"role":"user","content":"Write a Python quicksort"}]}'
```

Sources: https://docs.x.ai/docs/models/grok-build-0.1 , https://docs.x.ai/docs/models

Model page: https://postcutoff.com/m/grok-build-0-1/