Current documented limits
| Constraint | Current value | Scope | Verified source |
|---|---|---|---|
| Grok 4.6 contextRequests above 200K context have separate documented pricing. | 500,000 tokens | xAI API model grok-4.6 | xAIAug 22, 2026 |
| per-model rate dimensionsThe per-second request limit is derived from the minute budget and prevents full-minute bursts. | RPS and TPM vary by model and cumulative-spend tier | Per xAI API team | xAIAug 22, 2026 |
| Files API upload sizeThe API exposes separate initialize and chunk-upload operations. | 50 MB per file | xAI Files API | xAIAug 22, 2026 |
| Grok app file sizeDocuments, images, code, and audio use this general app allowance; behavior can vary by platform or subscription. | Most supported files: up to 150 MB each | Grok website and apps | xAIAug 22, 2026 |
How to apply Grok limits safely
The monitored baseline covers Grok 4.6 context, per-model rate dimensions, Files API upload size, Grok app file size. Treat these as separate constraints rather than one platform-wide capacity number: a workload can fit one row and still fail another because the plan, model, endpoint, runtime, region, invocation mode, or account scope differs.
- Match the production workload to the exact scope printed beside each value and confirm it in the active Grok console, configuration, or response headers.
- Measure the serialized request, token volume, duration, concurrency, storage, or connection demand at realistic percentiles, then preserve headroom for bursts and retries.
- Check every adjacent layer—client, SDK, gateway, proxy, queue, database, and downstream service—for a smaller effective limit before changing architecture.
Specific limit pages
These pages exist because the constraint has a distinct implementation or troubleshooting intent. Closely related keyword variations stay consolidated.
Grok 4.6 Context Window
Grok 4.6 Context Window, verified against Grok's official documentation with scope, implementation impact, caveats, and a direct check.
xAI Grok API Rate Limits
xAI Grok API Rate Limits, verified against Grok's official documentation with scope, implementation impact, caveats, and a direct check.
xAI Files API Upload Limit
xAI Files API Upload Limit, verified against Grok's official documentation with scope, implementation impact, caveats, and a direct check.
Grok App File Upload Limits
Grok App File Upload Limits, verified against Grok's official documentation with scope, implementation impact, caveats, and a direct check.