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$150/month in xAI free credits is on the table if you opt into xAI’s data sharing program. You also get a $25 one-time signup credit just for creating a new API account.

Indie devs building agents, startup teams watching burn, researchers poking at model behavior without a big budget. This program can work for all of them, as long as you’re comfortable with the data tradeoff.

This guide covers eligibility, the exact signup flow, the important limits, and a few practical ways to stretch the credits.

Program at a Glance

What You Actually Get

xAI gives every new API account $25 in promotional credits, and it can optionally add $150/month in recurring credits if your team opts into irrevocable data sharing. Those credits work across the Grok model family, from Grok 3 Mini (listed at $0.10 per 1M input tokens) up to Grok 4 (listed at $3 per 1M input tokens). The API is designed to be easy to integrate if you’ve used other LLM providers: xAI notes OpenAI SDK compatibility (via a base URL change) and support for Anthropic’s SDK for compatible endpoints.

In practical terms, $25 is enough to sanity-check integration, run a small prototype, and learn the rough cost profile of your prompts. The $150/month is the real prize: xAI’s own estimates put it around 750M input tokens on Grok 4.1 Fast, or about 1.5B input tokens on Grok 3 Mini, which is a lot of iteration for typical app development.

Who Qualifies (and Who Doesn’t)

There are two layers here: the $25 promotional credit for new API accounts, and the $150/month data sharing credits for teams that meet xAI’s prerequisites and accept the terms. The second part is where most people get tripped up, because the opt-in is permanent for that team.

  • You need to create a new xAI API account, since the $25 credit is a new-account promo.
  • No credit card is required to create the account and use the $25 promotional credit.
  • To enable the $150/month program, your team must have at least $5 in total prior API spend (and xAI says promo credits count).
  • Only team admins can enable data sharing from the xAI Console billing/credits area.

If you’re in a country xAI doesn’t support for the data sharing program, you won’t be able to enable it. Also, if you can’t accept irrevocable data sharing (for example, you handle proprietary code or sensitive customer data), you should treat the $150/month as effectively “not eligible” for your use case.

How to Sign Up

Registration is fast, and you can be making API calls in about 10 minutes if email verification goes smoothly.

  1. Go to console.x.ai or accounts.x.ai/sign-up.
  2. Click “Sign Up”. Register with email + password, or use “Login with X” to authenticate via your X account.
  3. Verify your email by clicking the confirmation link sent to your inbox.
  4. Log in to the xAI dashboard. Your $25 promotional credit should appear within minutes.
  5. Navigate to “API Keys” in the left sidebar and click “Create New Key”.
  6. Copy and securely store the generated key (it starts with xai-). It is only shown once.
  7. Authenticate requests with Authorization: Bearer <your xAI API key> against the base URL https://api.x.ai.

After signup, the first credit you’ll see is the $25 promo credit, which xAI says shows up within minutes. If you later enable data sharing credits, those appear within about 24 hours and then refresh monthly.

What the Credits Cover

The credits are for xAI’s API usage: Grok text models, plus the tool calls and some image-capable endpoints that xAI lists as available models. If you’re used to OpenAI-style integrations, xAI explicitly calls out that you can often migrate by changing the base URL to https://api.x.ai/v1 in the OpenAI client.

Notable exclusion: Grok access through X subscriptions (Free, Premium+, SuperGrok tiers) is conversational only and does not include API access. Don’t mix those up when you’re budgeting.

Limitations to Know About

Every free program has catches. With xAI’s credits, the catches are mostly about time limits, non-rollover behavior, and the permanence of the data sharing choice.

  • The $25 promotional credits expire 30 days after account creation, so don’t “save them for later”.
  • The $150/month data sharing credit does not accumulate, and unused credits do not roll over to the next month.
  • Data sharing is irrevocable for the team that opts in; xAI states you cannot opt out once enabled.
  • Grok 4 is reasoning-only and does not support the reasoning_effort parameter (xAI says it will return an error).

When credits run out, billing behavior depends on your account settings. xAI notes that the default invoiced spending limit is $0, which stops API access when you hit the limit (no surprise bills). If you raise that limit or add prepaid/invoiced billing, you can keep running, but then you’re on paid usage.

Have Unused xAI Credits?

Unused credits are more common than people admit. Teams grab promos, run a quick experiment, then priorities change and the credits sit there until they expire or become irrelevant to the project. If you end up with surplus xAI credits you can’t use, AI Credit Mart lets you turn that into cash instead of letting it quietly go to zero.

List your unused xAI credits →

Need More xAI Credits?

Once your free credits are gone, paying list price isn’t your only option. AI Credit Mart aggregates discounted xAI credits from organizations with extra allocation they can’t fully use. Discounts typically land around 30-70% off retail, which is an easy win if Grok is in your production path.

Browse discounted xAI credits →

Tips for Getting the Most Out of Your Credits

  • Use the OpenAI Python/JS SDK with base_url="https://api.x.ai/v1" so you can swap providers without rewriting your whole client.
  • Set an invoiced spending limit in the xAI console; the default is $0, which is great for avoiding accidental charges.
  • Pick Grok 4.1 Fast for most workloads; xAI calls it the best balance of capability and cost, and their $150 estimate goes a long way on it.
  • If you need data sharing credits, run at least $5 of total spend first (promo credits count), then enable the program from the Credits area on the Billing page.
  • Create multiple teams: opt one team into data sharing for non-sensitive work, and keep another team “clean” for proprietary projects.

Related Credit Programs

If you’re comparing LLM APIs mainly on “free runway,” Anthropic’s promo is a nice sanity check against xAI’s pricing. This guide to Anthropic’s $50 Claude Pro/Max credit promo is useful when you want a smaller, low-commitment credit drop with different model behavior.

For teams experimenting with alternative model providers (especially if you’re testing latency and throughput), take a look at SambaNova Cloud free API access. It’s a different stack, and sometimes that’s the point when you’re benchmarking.

If your workload is more “run models as hosted endpoints” than “commit to one API,” Replicate free credits can be a better fit for quick experiments across lots of models and media types.


Quick reference:

Frequently Asked Questions

How much are xAI Grok API – $150/Month Data Sharing Credits credits worth?

The program includes a $25 one-time signup credit (expires after 30 days) and an optional $150/month credit if you accept irrevocable data sharing. xAI’s own estimates say $150 can cover roughly 750M input tokens on Grok 4.1 Fast, about 1.5B input tokens on Grok 3 Mini input, or around 50M Grok 4 input tokens. Real spend depends heavily on output tokens and tool calls. If you use Web Search, X Search, Code Execution, or other tools, those are billed separately per 1,000 calls/sources and will eat into the credit faster than pure text.

Do I need a credit card to sign up for xAI Grok API – $150/Month Data Sharing Credits?

No. xAI says you can create an account and use the $25 promotional credit without a credit card.

How long do xAI free credits last?

The $25 promotional credit expires 30 days after account creation, while the $150 data sharing credits refresh monthly and do not roll over.

Can I sell my unused xAI credits?

Yes. If you have xAI credits you won’t use before they expire, you can list them on AI Credit Mart and sell them at up to 70% of face value. Companies regularly list surplus credits from startup programs and enterprise agreements.

Where can I buy discounted xAI credits?

AI Credit Mart has discounted xAI credits available from companies with surplus allocations. Prices are typically 30-70% below retail.

What happens when xAI credits expire?

The $25 promo credits disappear after 30 days, and unused monthly data sharing credits don’t carry forward to the next month. If you’ve left your invoiced spending limit at the default ($0), your API access will stop when there’s no credit left to cover usage.

How do I enable the $150/month data sharing credits?

First, your team needs at least $5 in total prior API spend (promo credits count). Then go to the Credits section on the xAI Console Billing page, read and accept the data sharing terms, and enable it as a team admin. xAI says credits appear within about 24 hours and refresh monthly. Be careful: opting in is permanent for that team, so many people create a separate “non-sensitive” team specifically for data sharing.

Is the xAI data sharing program safe for proprietary prompts or customer data?

No. xAI states your prompts and model responses may be used to train future models, and they explicitly note it’s not suitable for proprietary code, confidential business data, or personal information.

$25 to get started, and potentially $150/month if you can live with the data sharing terms. Use it to build fast, keep your spending limit tight, and if you wind up with surplus credits later, you know where to offload them.

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