xAI (Grok): Spend-based rate limit tiers introduced for text models, unlocking automatically by cumulative spend since Jan 1 2026.
Old Higher limits by emailing xAI
New Tier 1 $0; Tier 2 $50; Tier 3 $200; Tier 4 $500; Tier 5 $1,000; Tier 6 $5,000; Enterprise on request
Why it matters: If you use xAI API (rate limit tiers), this changes how much you can send before requests are limited. The source does not state a separate effective date.
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| Product | xAI API (rate limit tiers) |
|---|---|
| Category | rate-limit |
| Announced / detected | between 2026-03-13 and 2026-03-23 Backfilled |
| Backfilled | Yes: added retroactively, detected between 2026-03-13 and 2026-03-23 |
| Quote verified against | https://web.archive.org/web/20260323222230/https://docs.x.ai/developers/rate-limits |
| Archive captures | https://web.archive.org/web/20260313011613/https://docs.x.ai/developers/rate-limits https://web.archive.org/web/20260323222230/https://docs.x.ai/developers/rate-limits |
| Effective | not stated in source |
| Before | Higher limits by emailing xAI |
| After | Tier 1 $0; Tier 2 $50; Tier 3 $200; Tier 4 $500; Tier 5 $1,000; Tier 6 $5,000; Enterprise on request |
| Official source | https://docs.x.ai/developers/rate-limits |
| Source quote | which is based on your cumulative spend on the xAI API since January 1, 2026. Tiers unlock automatically as you spend more—no manual upgrade required. |
| Archive | No post-change Wayback capture found |
| Snapshot hash | sha256:562666a4a9c69b3f4b2ccd957f92779f16044d56b00d8a7f7395f6d9fcc2e156 |
| Status | verified |
All xAI (Grok) changes · Dispute or correct this entry
Previous changes from xAI (Grok)
- between 2026-09-28 and 2026-10-13 Backfilled: Per-second request limit formula loosened from RPM / 60 to RPM / 48 with a minimum of 2.
- between 2026-09-10 and 2026-09-28 Backfilled: Voice models brought under the spend-based rate limit tiers.
- 2026-09-02: grok-imagine-image-quality retires 2026-11-02; requests will be served by grok-imagine-image-2.0 (quality=low) at a lower per-image price.
- between 2026-06-15 and 2026-07-06 Backfilled: Request limits switched from requests per minute to requests per second, derived as RPM / 60.
- 2026-06-15 Backfilled: A priority service tier became available on text inference endpoints; priority rates are billed only when priority is applied.
- between 2026-04-02 and 2026-04-13 Backfilled: Rate limit tiers consolidated from six to five (Tier 0-4) with new spend thresholds.
How xAI (Grok) limits and pricing work · All changes, March 2026