Specification

Release date: 2 Mar 2022
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 3 h agomedium
Openness: open-weights
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 3 h agomedium
Architecture: BertForMaskedLM
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 3 h agomedium
Hugging Face repo: amazon/bort
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 3 h agomedium
Pipeline tag: fill-mask
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 3 h agomedium
Model card: huggingface.co/amazon/bort
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 3 h agomedium
Downloads: 823
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 55 min agomedium
Likes: 18
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 55 min agomedium
Gated: No
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 3 h agomedium
Last modified: 2025-05-29T16:02:15+00:00
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 3 h agomedium
Library name: transformers
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 3 h agomedium
Downloads all time: 36,230
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 55 min agomedium
Model type: bert
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 3 h agomedium
Tags: transformers, pytorch, tf, jax, bert, fill-mask
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 3 h agomedium

Each value shows its source, tier and observation time. Conflicting claims are kept side by side and flagged — never averaged. How AI Atlas records facts →

Provenance

Attributed facts

14

Source tiers

T214

Freshest observation

55 min ago

Conflicts

None

Modalities

Modalities unavailable.

Capabilities

Tool calling
Unavailable
Structured output
Unavailable
Reasoning
Unavailable
Vision
Unavailable
Audio
Unavailable
Fine-tuning available
Unavailable

No capability flags have been observed from a source yet — we do not infer them.

No structured attributes yet.

No benchmark results recorded

Results appear when a tier 1–3 source publishes them; we never copy scores without a source.

Current prices

No current prices recorded

Prices appear when a provider publishes a public pricing page we crawl.

Price history

No hardware estimate available

Estimates need a parameter count; this model has none recorded from a source.

No lineage recorded

Lineage comes from explicit `derived_from`, `fine_tuned_from`, `distilled_from` and `quantized_from` relations stated by sources.

Papers 1

arXiv:2010.10499Active
35

Repositories 0

No repositories linked yet.

As of

Rewind the record: see this entity's attributes exactly as AI Atlas knew them on a given day.

Claim history · Hugging Face repo

1 claims · 1 propertiesShow all properties

Hugging Face repohf_repo1

Claim history for Hugging Face repo
Value	Valid from → to	Status	Source	Confidence	Extractor
amazon/bort	11 Sept 2026 21:10 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Claims are temporal and append-only: a new observation closes the previous claim (valid_to) instead of overwriting it. Conflicting claims from different sources are kept side by side and flagged — never averaged. Methodology →

11 Sept 2026
New modelModelbortAmazon Web Services
New model: bort (Amazon Web Services)
huggingface
huggingface.co

Full timeline →

Source documents
Source	Document	Type	Tier	Last observed	Snapshots
Hugging Face Hub (public pages, model cards, papers)	huggingface.co/amazon/bort/raw/main/README.md	model_card	T2· Quality secondary	17 min ago	1
Hugging Face Hub (public pages, model cards, papers)	huggingface.co/amazon/bort	model_page	T2· Quality secondary	55 min ago	3
Hugging Face Hub (public pages, model cards, papers)	huggingface.co/models?author=amazon&p=0&sort=downloads	listing	T2· Quality secondary	59 min ago	3

Tier 1 = official/primary, 2 = quality secondary, 3 = community, 4 = unverified. Every snapshot is archived; see all sources and the methodology.