Specification

Release date: 29 May 2023
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium
Openness: open-weights
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 2 h agomedium
License: apache-2.0
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium
Parameters: 1.42B
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 2 h agomedium
Languages: en
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium
File size: 5.7 GB
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium
Hugging Face repo: stanford-crfm/levanter-backpack-1b
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 2 h agomedium
Pipeline tag: text-generation
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 2 h agomedium
Model card: huggingface.co/stanford-crfm/levanter-backpack-1b
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 2 h agomedium
Downloads: 116
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium
Likes: 6
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium
Datasets: openwebtext
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium
Gated: No
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium
Last modified: 2023-05-30T03:17:16+00:00
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 2 h agomedium
Library name: transformers
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium
Downloads all time: 29,686
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium
Model type: backpack-gpt2
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium
Tags: transformers, safetensors, backpack-gpt2, backpack, backpackmodel, text-generation, custom_code, en
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium
Weights dtype: F32
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 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

19

Source tiers

T219

Freshest observation

1 h 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.

Languages: en
Source:Hugging Face Hub (public pages, model cards, papers)T2observed 1 h agomedium

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

Estimated

Memory need = bytes per parameter (4-bit ≈ 0.5 × 1.15 overhead, 8-bit 1.0, fp16 2.0) + a KV-cache allowance. Not a measurement.

Estimated hardware fit
Hardware	Quantization	Memory	Est. need	Fits
Apple M3 Ultra	4bit	—	1.3 GB	Yes
AMD Instinct MI325X	4bit	256 GB	1.3 GB	Yes
AMD Instinct MI300X	4bit	192 GB	1.3 GB	Yes
Apple M2 Ultra	4bit	—	1.3 GB	Yes
NVIDIA B200	4bit	180 GB	1.3 GB	Yes
NVIDIA H200	4bit	141 GB	1.3 GB	Yes
Apple M1 Ultra	4bit	—	1.3 GB	Yes
Apple M3 Max	4bit	—	1.3 GB	Yes
Apple M4 Max	4bit	—	1.3 GB	Yes
NVIDIA DGX Spark	4bit	128 GB	1.3 GB	Yes
Apple M2 Max	4bit	—	1.3 GB	Yes
NVIDIA A100 80GB	4bit	80 GB	1.3 GB	Yes
NVIDIA H100 SXM	4bit	80 GB	1.3 GB	Yes
Apple M1 Max	4bit	—	1.3 GB	Yes
Apple M4 Pro	4bit	—	1.3 GB	Yes
Apple M3 Pro	4bit	—	1.3 GB	Yes
Apple M1 Pro	4bit	—	1.3 GB	Yes
Apple M2 Pro	4bit	—	1.3 GB	Yes
Apple M4	4bit	—	1.3 GB	Yes
NVIDIA GeForce RTX 5090	4bit	32 GB	1.3 GB	Yes
Apple M2	4bit	—	1.3 GB	Yes
Apple M3	4bit	—	1.3 GB	Yes
NVIDIA GeForce RTX 3090	4bit	24 GB	1.3 GB	Yes
NVIDIA GeForce RTX 4090	4bit	24 GB	1.3 GB	Yes
Apple M1	4bit	—	1.3 GB	Yes

No lineage recorded

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

Papers 1

arXiv:2305.16765Active

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

19 claims · 19 properties

Release daterelease_date1

Claim history for Release date
Value	Valid from → to	Status	Source	Confidence	Extractor
29 May 2023	11 Sept 2026 22:04 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Opennessopenness1

Claim history for Openness
Value	Valid from → to	Status	Source	Confidence	Extractor
open-weights	11 Sept 2026 21:11 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Licenselicense1

Claim history for License
Value	Valid from → to	Status	Source	Confidence	Extractor
apache-2.0	11 Sept 2026 22:04 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Parametersparameter_count1

Claim history for Parameters
Value	Valid from → to	Status	Source	Confidence	Extractor
1.42B	11 Sept 2026 21:11 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Languageslanguages1

Claim history for Languages
Value	Valid from → to	Status	Source	Confidence	Extractor
en	11 Sept 2026 22:04 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

File sizefile_size_gb1

Claim history for File size
Value	Valid from → to	Status	Source	Confidence	Extractor
5.7 GB	11 Sept 2026 22:04 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Hugging Face repohf_repo1

Claim history for Hugging Face repo
Value	Valid from → to	Status	Source	Confidence	Extractor
stanford-crfm/levanter-backpack-1b	11 Sept 2026 21:11 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Pipeline tagpipeline_tag1

Claim history for Pipeline tag
Value	Valid from → to	Status	Source	Confidence	Extractor
text-generation	11 Sept 2026 21:11 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Model cardmodel_card_url1

Claim history for Model card
Value	Valid from → to	Status	Source	Confidence	Extractor
https://huggingface.co/stanford-crfm/levanter-backpack-1b	11 Sept 2026 21:11 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Downloadsmetric.downloads1

Claim history for Downloads
Value	Valid from → to	Status	Source	Confidence	Extractor
116	11 Sept 2026 21:11 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Likesmetric.likes1

Claim history for Likes
Value	Valid from → to	Status	Source	Confidence	Extractor
6	11 Sept 2026 21:11 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Datasetsdatasets1

Claim history for Datasets
Value	Valid from → to	Status	Source	Confidence	Extractor
openwebtext	11 Sept 2026 22:04 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Gatedgated1

Claim history for Gated
Value	Valid from → to	Status	Source	Confidence	Extractor
No	11 Sept 2026 22:04 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Last modifiedlast_modified1

Claim history for Last modified
Value	Valid from → to	Status	Source	Confidence	Extractor
2023-05-30T03:17:16+00:00	11 Sept 2026 21:11 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Library namelibrary_name1

Claim history for Library name
Value	Valid from → to	Status	Source	Confidence	Extractor
transformers	11 Sept 2026 22:04 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Downloads all timemetric.downloads_all_time1

Claim history for Downloads all time
Value	Valid from → to	Status	Source	Confidence	Extractor
29,686	11 Sept 2026 22:04 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Model typemodel_type1

Claim history for Model type
Value	Valid from → to	Status	Source	Confidence	Extractor
backpack-gpt2	11 Sept 2026 22:04 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Tagstags1

Claim history for Tags
Value	Valid from → to	Status	Source	Confidence	Extractor
transformers, safetensors, backpack-gpt2, backpack, backpackmodel, text-generation, custom_code, en	11 Sept 2026 22:04 UTC → current	current	Hugging Face Hub (public pages, model cards, papers)T2	medium	deterministic

Weights dtypeweights_dtype1

Claim history for Weights dtype
Value	Valid from → to	Status	Source	Confidence	Extractor
F32	11 Sept 2026 22:04 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 modelModellevanter-backpack-1bStanford CRFM
New model: levanter-backpack-1b (Stanford CRFM)
huggingface
huggingface.co

Full timeline →

Source documents
Source	Document	Type	Tier	Last observed	Snapshots
Hugging Face Hub (public pages, model cards, papers)	huggingface.co/stanford-crfm/levanter-backpack-1b	model_page	T2· Quality secondary	1 h ago	1
Hugging Face Hub (public pages, model cards, papers)	huggingface.co/models?author=stanford-crfm&p=0&sort=downloads	listing	T2· Quality secondary	2 h ago	2

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