Model error diagnosis

Free Models Router | context length exceeded

Free Models Router returning 400 / context length exceeded means you should first confirm whether model ID openrouter/free is visible for this Openrouter key, then separate permission, context, capability, rate limit, or route issues.

Model

openrouter/free

Free Models Router

Provider

Openrouter

3 models in catalog

Error type

context length exceeded

context-exceeded

Status code

400

global model route

Model error summary

Model

openrouter/free

Error type

context-exceeded

Status code

400

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

What this model error usually means

Free Models Router returning 400 / context length exceeded means you should first confirm whether model ID openrouter/free is visible for this Openrouter key, then separate permission, context, capability, rate limit, or route issues.

Model: openrouter/free
Provider: Openrouter
Status code: 400

How to prove it during checking

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

List models: confirm whether openrouter/free is actually visible instead of guessing from the display name.
Light probe: use minimal input to verify whether Openrouter returns the same 400, then record the error body.
Compare model facts: context 200,000, input $0.000, output $0.000.
supports frequency_penalty
supports include_reasoning
supports max_tokens
supports min_p

Next action

Free Models Router 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: 200,000
Price: $0.000 / $0.000
Read-only check. Detection data burns after 5 minutes.

Open key check

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