generated: '2026-08-26'
method: searched
source: registry metadata (pypi.org/pypi/<pkg>/json) plus github.com/pfnet and github.com/pfnet-research
name: Preferred Networks packages
description: >-
  Preferred Networks publishes no first-party client SDK for the PLaMo API. Its own quickstart
  instructs developers to use the third-party openai and langchain-openai libraries with the base URL
  repointed, which is a deliberate consequence of the API being OpenAI-compatible — so the absence of
  a PLaMo SDK is a design choice, not neglect, and no SDKs pointer is emitted for this provider. The
  packages below are the first-party libraries and tools PFN does publish; only plamo-translate is a
  PLaMo product package. Versions and dates are read from the PyPI JSON metadata endpoint.
sdk_for_plamo_api:
  first_party: none
  documented_clients:
  - {name: openai, registry: pypi, first_party: false, note: Third-party OpenAI client, documented by PFN with base_url override}
  - {name: langchain-openai, registry: pypi, first_party: false, note: Third-party LangChain integration, documented by PFN with base_url override}
  source: https://docs.plamo.preferredai.jp/en/getting-started
packages:
- name: plamo-translate
  registry: pypi
  url: https://pypi.org/project/plamo-translate/
  repository: https://github.com/pfnet/plamo-translate-cli
  official: true
  kind: cli
  language: python
  license: Apache-2.0
  version: 1.0.5
  published: '2025-10-18'
  note: >-
    First-party CLI for the plamo-2-translate model, running locally (MLX on Apple Silicon). Also
    starts a local MCP server — see mcp/preferred-networks-mcp.yml and cli/preferred-networks-cli.yml.
- name: pytorch-pfn-extras
  registry: pypi
  url: https://pypi.org/project/pytorch-pfn-extras/
  repository: https://github.com/pfnet/pytorch-pfn-extras
  official: true
  kind: library
  language: python
  version: 0.9.0
  published: '2026-02-25'
  note: Supplementary components for PyTorch research and development; PyPI author is "Preferred Networks, Inc.".
- name: pfio
  registry: pypi
  url: https://pypi.org/project/pfio/
  repository: https://github.com/pfnet/pfio
  official: true
  kind: library
  language: python
  version: 2.10.0
  published: '2026-05-22'
  note: IO library providing a unified API across filesystems.
- name: pysen
  registry: pypi
  url: https://pypi.org/project/pysen/
  repository: https://github.com/pfnet/pysen
  official: true
  kind: tooling
  language: python
  version: 0.12.1
  published: '2026-07-21'
  note: Python linting configuration tool.
- name: optuna
  registry: pypi
  url: https://pypi.org/project/optuna/
  repository: https://github.com/optuna/optuna
  official: true
  kind: library
  language: python
  version: 4.9.0
  published: '2026-06-01'
  note: >-
    Hyperparameter optimisation framework created at Preferred Networks in 2018 and now developed in
    its own GitHub organisation. Recorded as first-party by origin; governance has moved outside PFN.
- name: pfrl
  registry: pypi
  url: https://pypi.org/project/pfrl/
  repository: https://github.com/pfnet/pfrl
  official: true
  kind: library
  language: python
  version: 0.4.0
  published: '2023-07-16'
  status: dormant
  note: PyTorch deep reinforcement learning library; last release 2023-07-16.
- name: chainer
  registry: pypi
  url: https://pypi.org/project/chainer/
  repository: https://github.com/chainer/chainer
  official: true
  kind: library
  language: python
  version: 7.8.1
  published: '2022-01-05'
  status: maintenance-only
  note: >-
    The deep learning framework PFN released in 2015; development moved to maintenance mode in 2019
    when PFN migrated to PyTorch. Last release 2022-01-05.
absent:
- {registry: npm, checked: true, result: no first-party PLaMo or PFN client package found}
- {registry: pypi, package: plamo, status: 404, note: The bare name plamo is not published.}
- {registry: maven-central, checked: true, result: none found}
- {registry: nuget, checked: true, result: none found}
- {registry: rubygems, checked: true, result: none found}
- {registry: crates.io, checked: true, result: none found}
- {registry: packagist, checked: true, result: none found}
- {registry: pkg.go.dev, checked: true, result: none found}