Why this limit matters
Anthropic: Claude Opus 4.6 max output limit decides whether a key can enter a production route. TestKey reads model ID anthropic/claude-opus-4.6, provider Anthropic, catalog context, real-key headers, 429 errors, and region signals together.
- Model: anthropic/claude-opus-4.6
- Provider: Anthropic
- Limit dimension: max output limit