What is the context length of Polaris Alpha?

Polaris Alpha has a 256,000 token context window.

What inputs and outputs does Polaris Alpha support?

Polaris Alpha accepts text and images as input and returns text.

When was Polaris Alpha released?

Polaris Alpha was released on November 6, 2025.

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

All prompts and completions for this model are logged by the provider and may be used to improve the model.

Polaris Alpha

openrouter/polaris-alpha

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

This is a cloaked model provided to the community to gather feedback. A powerful, general-purpose model that excels across real-world tasks, with standout performance in coding, tool calling, and instruction following.

Note: All prompts and completions for this model are logged by the provider and may be used to improve the model.

Modalities

Context

256K

Released

Nov 6, 2025

Not currently available through EU in-region routing. In-region routing docs

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Polaris Alpha

Activity

Frequently asked questions

What is Polaris Alpha?

What is the context length of Polaris Alpha?

What inputs and outputs does Polaris Alpha support?

When was Polaris Alpha released?

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