---
id: ai21
version: "4.3.0"
license: unclear
license_treatment: unclear
maintenance: aging
---

# ai21

License: unclear · Maintenance: aging · Downloads: 192.1K/mo

## What it is and what it does

The ai21 package is a Python client library for AI21 Labs' language models, primarily Jamba. It abstracts the REST API calls needed to interact with these models, offering both synchronous and asynchronous interfaces. The package handles authentication, request formatting, and response parsing, so you can focus on building applications rather than managing HTTP details.

It supports multiple use patterns: chat completions (conversation-style interactions), text completion (prompt-based generation), streaming responses (for real-time output), and higher-level orchestration via Maestro (planning and requirements management) and Agents (beta, for autonomous task execution). The library also includes experimental Conversational RAG for retrieval-augmented generation over your own documents. Dependencies are minimal and well-established (httpx for HTTP, pydantic for validation, tenacity for retry logic), keeping the install lightweight.

Use it for:

- Build a chatbot or conversational AI application using Jamba models with the chat completions API.
- Stream long-form text generation responses in real time to a user interface.
- Orchestrate multi-step AI workflows with requirements and quality checks using Maestro.
- Create autonomous agents that can plan and execute tasks with the Agents API (beta).
- Implement retrieval-augmented generation over custom documents with Conversational RAG (beta).

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Python SDK for accessing AI21 Labs' language models (including Jamba) via REST API, with support for chat completions, text completion, streaming, and agent orchestration.

Yes, if you are actively using AI21 Labs' models and need a Python interface. The package has low install friction and covers the main API patterns (chat, completion, streaming, agents). However, verify the license terms first, and be aware that the package is aging (last release 281 days ago) with no visible recent maintenance activity—suitable for stable use but not for projects requiring active development or frequent updates.

## Install

pip install ai21
uv add ai21
poetry add ai21

## Installing ai21

Before you install: Low install friction with four lightweight runtime dependencies (httpx, pydantic, tenacity, typing-extensions). Package is aging—last release was 281 days ago—so maintenance activity is limited; no recent commits or repository details available to assess active development.

License in practice: License status is unclear; no SPDX identifier or raw license text is available in the package metadata. Verify the actual license terms before adopting in a commercial or restricted-license project.

Quickstart:

pip install ai21

from ai21 import AI21Client
from ai21.models.chat import ChatMessage

client = AI21Client(api_key='my_api_key')
messages = [ChatMessage(content="Hello", role="user")]
response = client.chat.completions.create(
    messages=messages,
    model="jamba-mini"
)

Requires a valid AI21 Labs API key, typically provided via the AI21_API_KEY environment variable or passed explicitly to the client.

Verify before relying:

- Whether the package is actively maintained or in maintenance-only mode (no recent commit history available).
- Exact license terms and any restrictions on commercial use or redistribution.
- Current status and stability of beta features (Agents, Conversational RAG, Maestro).

## Package facts

- License: not declared (unclear)
- Python support: supports_current
- Install friction: low
- Maintenance: aging
- Downloads: 192.1K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

AI21 Labs API client, Jamba language model SDK, chat completions Python, LLM API wrapper, AI orchestration framework, streaming language model, agent management SDK, llm-client, api-wrapper, async-support

[View on SkillFed](https://skillfed.io/packages/ai21) · [View on PyPI](https://pypi.org/project/ai21/)