Contextual AI Reranker
Contextual AI Reranker is a model family from Contextual AI12, with 1 assessed release in this catalog. Licenses and availability are recorded for each release, not for the family; its releases use the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International.
Contextual AI's reranker models score how relevant retrieved documents are to a query and can follow a natural-language instruction about how to rank them, for example to prefer recent sources. Reranker v2, released in August 2025, comes in 1B, 2B, and 6B sizes with quantized versions, supports more than 100 languages and inputs of up to 32K tokens, and is published as open weights for noncommercial use; managed versions are served through Contextual AI's Rerank API.124
- Release notes: Reranker v2 announcement (external site: contextual.ai)
- Model hub: Contextual AI on Hugging Face (external site: huggingface.co)
Releases assessed
| Release | Weights | Tier (USASI rubric v0.2) | License | Released |
|---|---|---|---|---|
| Contextual AI Reranker v2 2B | Weights: Public | Model-disclosure tier (USASI rubric v0.2): Open-weight | CC-BY-NC-SA-4.0 | Aug 27, 2025 |
What it is useful for
Re-ranking documents in retrieval-augmented generation and search pipelines, including multilingual collections and cases with conflicting or time-sensitive information.2
Organization context
Provenance and derivatives
Neither the v2 model cards nor the announcement name the checkpoint the rerankers were trained from. The published model configuration declares the Qwen3ForCausalLM architecture (model type qwen3), the architecture of Alibaba Cloud's Qwen3 models; this catalog does not infer from that alone which weights, if any, the rerankers derive from.2136
U.S. eligibility
Eligible · basis: U.S. headquarters
The reranker models are developed and published by Contextual AI, Inc., which gives a Mountain View, California postal address in its privacy notice (see the Contextual AI record). The base model the v2 rerankers start from is not named; see provenance. Each release is assessed on its own record.25
Sources
This listing is not an endorsement, a safety assessment, or a federal approval.
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APA style
USASI. (2026, October 2). Contextual AI Reranker. United States of America Superintelligence. https://unitedstatesofamericasuperintelligence.com/open/contextual-reranker/
BibTeX
@misc{usasi_contextual_reranker,
author = {{USASI}},
title = {Contextual AI Reranker},
year = {2026},
month = oct,
howpublished = {\url{https://unitedstatesofamericasuperintelligence.com/open/contextual-reranker/}},
note = {United States of America Superintelligence. Last updated 2026-10-02}
}The date is when this page was last updated. Add the date you read it if your style needs one.
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