Pegasus Xsum
Developed by Google, Pegasus Xsum is an open-source model specifically designed for summarization tasks, with a context window of 512 tokens. It is genuinely best at handling various summarization datasets, as evidenced by its performance on multiple benchmarks.
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Frequently asked questions about Pegasus Xsum
Answered from the entry's own fields: context, license, modalities, evidence, serving and the memory to self-host.
Pegasus Xsum advertises a context window of 512 tokens. The figure is the creator's published maximum; a given host may serve less, and the gateway routes on what each host actually serves.
Yes. Pegasus Xsum is an open-weight model released under the Apache 2.0 license, so the weights can be downloaded and self-hosted within that license's terms.
Pegasus Xsum accepts Text and produces Text. The capabilities card on this page lists which API features each deployment honours, such as function calling and structured output, with the source each was checked against.
No published benchmark result for Pegasus Xsum is in the catalog yet, so the model is shown as unmeasured. It is not ranked or estimated; the router treats it as unknown for every task until a suite measures it.
Not on the managed pool today; Pegasus Xsum is listed for reference and comparison. Connect your own provider key or endpoint that serves it and the gateway runs it on your account, with routing decisions recorded the same way.
Google has not published a parameter count for Pegasus Xsum, so the catalog cannot estimate its memory footprint. The capacity planner can size it from a parameter count you supply.
Fields collected from public registries, host APIs and benchmark publishers, each tagged with its source.
Last updated: Aug 28, 2026
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