YOU CAN NOW TEST UPCOMING GPT-5.1 ON OPENROUTER

Summary from the TLDR AI newsletter

OpenAI's latest code updates reference a general availability date of November 24 for the GPT-5.1 family for Enterprise accounts. Plus and Pro users may gain access to the models even earlier, possibly within the coming week. GPT-5.1 Thinking may currently be testing under the name Polaris Alpha on platforms such as OpenRouter. Polaris Alpha has a 256k context window and quite good performance.