> Grok Build
Grok Build is xAI's terminal coding agent, installed from x.ai/cli and documented at docs.x.ai/build, running on grok-4.6. The official CLI page states the tool is available to try for free and the client is open source, while xAI's developer pricing page meters every request at API token rates: grok-4.6 costs $2.00 per million input tokens, $0.50 per million cached input tokens and $6.00 per million output tokens for prompts under 200k tokens, rising to $4.00 / $1.00 / $12.00 once a request reaches the long-context threshold.
Sign in with your browser, or paste your ~/.grok/auth.json (or the JWT access token) from the Grok Build CLI; refresh_token is rotated automatically either way.
// pros
- The official product page states the CLI is available to try for free and links to an open-source repository.
- Installation is a single command on macOS, Linux and WSL, or a one-line PowerShell command on Windows, with no licensing step.
- Authentication can be browser-based or via an XAI_API_KEY environment variable, so it works in headless and CI environments.
- Features are documented rather than implied: plan mode, subagents with separate worktrees, skills, plugins and marketplaces, hooks, MCP servers and sandboxed execution.
- Any custom model can be wired in through a config file with a base_url and env_key, including OpenAI-compatible endpoints.
// cons
- The only free-usage statement is the phrase that the tool is available to try for free - no allowance, duration or credit amount is published.
- All real usage is metered on xAI API rates, and requests that reach the 200k-token long-context threshold are billed at the higher rate for every token in the request, not just the excess.
- Server-side tools add separate charges: web search, X search and code execution are each $5 per 1,000 calls, and file attachment search is $10 per 1,000 calls.
- The pricing page warns that model access might vary by geographical location and account limitations, and a $0.05 usage-guideline violation fee applies to requests blocked before generation.
Use Grok Build to evaluate grok-4.6 as a terminal agent, keeping prompts below the 200k-token long-context threshold, and budget it as metered API usage rather than a free tool for anything beyond initial testing.
written by Mike Fleming, Uprouter editorial · verified against official sources September 16, 2026
Free tier present — value not quantified
This provider offers a free tier, but its terms don’t convert cleanly into a USD figure (e.g. request-count limits or capacity-dependent pools). We refuse to print a misleading zero here. See the note below and the official pricing page for the exact limits.
note: No numeric free allowance is stated - x.ai/cli says only that Grok Build is available to try for free (checked 2026-09-16).
| Plan | Type | Monthly | Input /1M | Output /1M | Note |
|---|---|---|---|---|---|
| Free | free | — | — | — | Free Grok access with low rate limits. |
| SuperGrok Lite | subscription | $10.00/mo | — | — | Entry SuperGrok tier. |
| SuperGrok | subscription | $30.00/mo | — | — | Standard SuperGrok; higher rate limits and premium model access. |
| SuperGrok Heavy | subscription | $300.00/mo | — | — | Highest Grok usage tier. |
| X Premium+ | subscription | — | — | — | Also grants Grok Build access. |
Pricing normalized from public sources — always verify with the provider.
// model prices
| Model | Input /1M | Output /1M | Context |
|---|---|---|---|
| SpaceXAI: Grok Build 0.1 | $1.00 | $2.00 | 256k |
| SpaceXAI: Grok 4.3 (batch) | $1.00 | $2.00 | 1M |
| SpaceXAI: Grok 4.3 | $1.25 | $2.50 | 1M |
| SpaceXAI: Grok 4.20 Multi-Agent | $1.25 | $2.50 | 2M |
| Grok 4.6 | $2.00 | $6.00 | 500k |
| SpaceXAI: Grok 4.5 | $2.00 | $6.00 | 500k |
| Grok 4.3 | — | — | 1M |
| grok-4.5 | — | — | 500k |
| grok-4.6 | — | — | 500k |
| Grok 4.20 | — | — | 2M |
| grok-build-0.1 | — | — | 256k |
$ Does Grok Build have a free tier?
Yes — Grok Build offers a free tier. Always confirm current limits on Grok Build's official pricing page — free tiers change without notice.
$ How much does Grok Build cost per 1M tokens?
The cheapest model we track at Grok Build is $1.00 per 1M input tokens and $2.00 per 1M output tokens. This is normalized from Grok Build's published pricing — verify with the provider before purchasing, since prices change frequently.
$ Is Grok Build safe to use?
Uprouter rates Grok Build as medium risk. Medium risk. The client is free and open source, but inference is fully metered and the vendor reserves the right to vary model access by geography and account, so availability outside the tested region is not guaranteed. The pricing page was last updated on 2026-09-14, two days before this check, which indicates active rate changes, and a violation-fee structure exists for requests blocked by usage guidelines. Risk ratings are editorial, evidence-based, and never influenced by affiliate relationships.
Raw community sentiment, shown unblended. Votes never feed into objective data fields like price, risk, or status — and never into sort order.
No published reviews yet — be the first.
// more_informationprice history · live status · risk & confidence · code snippets
price_history
No recorded changes yet.
live_status
current: unknownNo probes recorded yet.
Uprouter runs its own probes; best-effort, not a guarantee. Probe results depend on our network location and cadence — for production, always use the provider’s own status page.
risk_&_confidence
Medium risk. The client is free and open source, but inference is fully metered and the vendor reserves the right to vary model access by geography and account, so availability outside the tested region is not guaranteed. The pricing page was last updated on 2026-09-14, two days before this check, which indicates active rate changes, and a violation-fee structure exists for requests blocked by usage guidelines.
Confidence reflects how much verifiable evidence (official docs, probe history, community reports) backs this entry. Risk is our editorial assessment of operator reliability and terms — not financial advice.
code_snippets
# Grok Build's own API — get a key from their dashboard
curl https://grok.com/chat/completions \
-H "Authorization: Bearer THEIR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "grok-4-3",
"messages": [{ "role": "user", "content": "Hello" }]
}'Direct to the provider — Uprouter receives nothing; verify their current pricing before purchasing.
Ranked by neutral similarity signals only — live status, free-tier shape and free-credit proximity. Commercial relationships never influence this list.