Palmyra
Family overview — summarizes releases; licenses and availability belong to each release.
Palmyra is Writer's family of language models. The Palmyra X models (currently X4, X5, and X6) are offered through Writer's platform and API. Writer has also published Palmyra models on Hugging Face: Palmyra-X-4.3-73B and domain models for medicine and finance under its non-commercial open model license, and the small Palmyra-mini models (September 2025) under Apache 2.0.21312161567
- Website: Writer models page (external site: writer.com)
- Documentation: Writer developer documentation (models) (external site: dev.writer.com)
- Model hub: Writer on Hugging Face (external site: huggingface.co)
- Release notes: Palmyra-mini announcement (Hugging Face blog) (external site: huggingface.co)
Releases assessed
| Release | Weights | Tier (USASI rubric v0.1) | License | Released |
|---|---|---|---|---|
| Palmyra-mini | Weights: Public | Model-disclosure tier (USASI rubric v0.1): Open-weight | Apache-2.0 | Sep 11, 2025 |
| Palmyra-mini-thinking-b | Weights: Public | Model-disclosure tier (USASI rubric v0.1): Open-weight | Apache-2.0 | Sep 11, 2025 |
What it is useful for
Organization context
Provenance and derivatives
The open Palmyra-mini models are fine-tunes of other developers' models: palmyra-mini and palmyra-mini-thinking-a are fine-tuned from Qwen2.5-1.5B (Alibaba Cloud's Qwen family), and palmyra-mini-thinking-b from NVIDIA's OpenReasoning-Nemotron-1.5B. The model card for Palmyra-Med-70B-32K says it builds on Writer's Palmyra-Med-70B.8910111617
- Derived from: Qwen2.5-1.5B (external site: huggingface.co) — Base of palmyra-mini and palmyra-mini-thinking-a.
- Derived from: OpenReasoning-Nemotron-1.5B (external site: huggingface.co) — Base of palmyra-mini-thinking-b; NVIDIA's card says it derives from Qwen2.5-1.5B.
U.S. eligibility
Sources
This listing is not an endorsement, a safety assessment, or a federal approval.