Model error diagnosis

Meta: Llama Guard 4 12B | context length exceeded

Meta: Llama Guard 4 12B returning 400 / context length exceeded means you should first confirm whether model ID meta-llama/llama-guard-4-12b is visible for this Meta key, then separate permission, context, capability, rate limit, or route issues.

Model

meta-llama/llama-guard-4-12b

Meta: Llama Guard 4 12B

Provider

What this model error usually means

Meta: Llama Guard 4 12B returning 400 / context length exceeded means you should first confirm whether model ID meta-llama/llama-guard-4-12b is visible for this Meta key, then separate permission, context, capability, rate limit, or route issues.

Model: meta-llama/llama-guard-4-12b
Provider: Meta
Status code: 400

How to prove it during checking

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

List models: confirm whether meta-llama/llama-guard-4-12b is actually visible instead of guessing from the display name.
Light probe: use minimal input to verify whether Meta returns the same 400, then record the error body.
Compare model facts: context 163,840, input $0.180, output $0.180.
supports frequency_penalty
supports logit_bias
supports max_tokens
supports min_p

Next action

Meta: Llama Guard 4 12B 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: 163,840
Price: $0.180 / $0.180
Read-only check. Detection data burns after 5 minutes.

Open key checker

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

Open models

Meta: Llama Guard 4 12B

Open providers