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CompareModelsCheck key
Model error diagnosis

Google: Gemini 3 Flash Preview | model capability unsupported

Google: Gemini 3 Flash Preview returning 400 / model capability unsupported means you should first confirm whether model ID google/gemini-3-flash-preview is visible for this Google key, then separate permission, context, capability, rate limit, or route issues.

Model
google/gemini-3-flash-preview
Google: Gemini 3 Flash Preview
Provider
Google
32 models in catalog
Error type
model capability unsupported
capability-unsupported
Status code
400
global model route
Model error summary
Model
google/gemini-3-flash-preview
Error type
capability-unsupported
Status code
400
Read-only check. Detection data burns after 5 minutes.
Read-only check. Detection data burns after 5 minutes.

What this model error usually means

Google: Gemini 3 Flash Preview returning 400 / model capability unsupported means you should first confirm whether model ID google/gemini-3-flash-preview is visible for this Google key, then separate permission, context, capability, rate limit, or route issues.

  • Model: google/gemini-3-flash-preview
  • Provider: Google
  • Status code: 400

How to prove it during checking

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

  • List models: confirm whether google/gemini-3-flash-preview is actually visible instead of guessing from the display name.
  • Light probe: use minimal input to verify whether Google returns the same 400, then record the error body.
  • Compare model facts: context 1,048,576, input $0.500, output $3.
  • supports include_reasoning
  • supports max_tokens
  • supports reasoning
  • supports response_format

Next action

Google: Gemini 3 Flash Preview model capability unsupported 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: 1,048,576
  • Price: $0.500 / $3
  • Read-only check. Detection data burns after 5 minutes.
Open key checker
Read-only check. Detection data burns after 5 minutes.
Open models
Google: Gemini 3 Flash Preview
Open providers
Google