Model error diagnosis

xAI: Grok 3 | context length exceeded

xAI: Grok 3 returning 400 / context length exceeded means you should first confirm whether model ID x-ai/grok-3 is visible for this xAI key, then separate permission, context, capability, rate limit, or route issues.

Model

x-ai/grok-3

xAI: Grok 3

Provider

xAI

10 models in catalog

Error type

context length exceeded

context-exceeded

Status code

400

global model route

Model error summary

Model

x-ai/grok-3

Error type

context-exceeded

Status code

400

Read-only check. Detection data burns after 5 minutes.

What this model error usually means

xAI: Grok 3 returning 400 / context length exceeded means you should first confirm whether model ID x-ai/grok-3 is visible for this xAI key, then separate permission, context, capability, rate limit, or route issues.

Model: x-ai/grok-3
Provider: xAI
Status code: 400

How to prove it during checking

Read-only check. Detection data burns after 5 minutes.

List models: confirm whether x-ai/grok-3 is actually visible instead of guessing from the display name.
Light probe: use minimal input to verify whether xAI returns the same 400, then record the error body.
Compare model facts: context 131,072, input $3, output $15.
supports frequency_penalty
supports logprobs
supports max_tokens
supports presence_penalty

Next action

xAI: Grok 3 context length exceeded should not end at failed. Return the next move: change model ID, add permission, reduce context, disable unsupported capability, change route, monitor, or hold listing.

Context: 131,072
Price: $3 / $15
Read-only check. Detection data burns after 5 minutes.

Open key checker

Read-only check. Detection data burns after 5 minutes.