vellum-ai

library1.14.7pypypi✓ verified 81d ago

Vellum is an AI workflow platform that allows you to build, deploy, and manage AI applications. The Python SDK provides programmatic access to Vellum's APIs for workflow execution, prompt management, and model deployment. Current stable version is 1.14.7, with active development and frequent releases.

llm-agents ai-ml

pip install vellum-ai

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · VELLUM-AI

vellum-ai

llm-agentspythonv1.14.7

Install

8.2s avg

Import

—

Disk

73MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v1.14.7 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 0.000s · 72.9MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 8.2s · import 0.000s · 73MB

73MB installed

● package 73MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

AsyncVellum

✓ from vellum import AsyncVellum

✗ from vellum import VellumClient

Initialize the client with API key and execute a workflow deployment.

import os from vellum import VellumClient client = VellumClient(api_key=os.environ.get('VELLUM_API_KEY', '')) # Execute a workflow result = client.execute_workflow( workflow_deployment_name="my_workflow", inputs={"question": "What is the capital of France?"} ) print(result)

Debug

Known issues

gotchaThe pip package is 'vellum-ai', but the Python module is just 'vellum'. Many users incorrectly import from 'vellum_ai' which does not exist.

fix

Use 'import vellum' or 'from vellum import ...'

affects: all

breakingIn version 1.14.0, the Port class added __rrshift__ method which changes how ports behave with operators. If you were using manual port assignments, this may cause unexpected behavior.

fix

Review port usage if using >> operator with Port objects.

affects: >=1.14.0

deprecatedThe 'hosted_by' field has been added to ML Model responses. Deprecations may apply to older model fields.

fix

Check release notes for deprecated fields.

affects: >=1.14.2

Upgrade

Version history

1.14.7latest on PyPI · released Mar 5, 2026

Audit

Dependencies

requestsrequiredHTTP client for API calls

pydanticrequiredData validation and settings management

Agent activity

42 hits · last 30 days

node

Amazon

OpenAI (training)

Resources

githubhttps://github.com/vellum-ai/vellum-python-sdks ↗

packagehttps://pypi.org/project/vellum-ai/ ↗

homepagehttps://www.vellum.ai ↗