Polaris Alpha (stealth)
Cloaked 256K-context model on OpenRouter; revealed as an early GPT-5.1 snapshot.
Source
Polaris Alphaopenrouter.ai · published
Revealed as
This model was an early snapshot of GPT-5.1 with reasoning effort set to minimal. Try the official launch of GPT-5.1 here: /openai/gpt-5.1