AI21 Labs

aid: ai21-labs
name: AI21 Labs
description: >-
  AI21 Labs is an enterprise foundation-model company best known for the Jamba
  family of open-weight hybrid Mamba/Transformer models and AI21 Maestro, a
  dynamic planning system that orchestrates tools, retrieval, and validated
  output during inference. The platform exposes a Bearer-token REST API at
  api.ai21.com covering chat completions, conversational RAG over a managed file
  library, batch processing, fine-tuning, and function calling. Official Python
  and TypeScript SDKs wrap the API with sync and async clients and integrate
  natively into LangChain and LlamaIndex. Jamba weights are also published on
  Hugging Face for self-hosted vLLM deployment.
type: Index
position: Provider
access: 3rd-Party
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
  - AI
  - Foundation Models
  - LLM
  - Jamba
  - Mamba
  - RAG
  - Agents
  - Maestro
  - Inference
  - Enterprise AI
  - Fine-Tuning
url: https://raw.githubusercontent.com/api-evangelist/ai21-labs/refs/heads/main/apis.yml
created: '2026-05-23'
modified: '2026-05-23'
specificationVersion: '0.20'
apis:
  - aid: ai21-labs:chat-completions
    name: AI21 Jamba Chat Completions API
    description: >-
      Conversational completions endpoint backed by the Jamba family of hybrid
      Mamba/Transformer models (Jamba 1.5 Mini, Jamba 1.5 Large, Jamba 1.6).
      Accepts a message array, system prompts, temperature, max tokens, tools,
      and streaming, returning assistant messages with usage metadata.
    humanURL: https://docs.ai21.com/reference
    baseURL: https://api.ai21.com/studio/v1
    tags:
      - Chat
      - Completions
      - Jamba
      - LLM
    properties:
      - type: Documentation
        url: https://docs.ai21.com/reference
  - aid: ai21-labs:maestro
    name: AI21 Maestro API
    description: >-
      Dynamic planning system that, at inference time, determines the optimal
      sequence of actions to solve a task. Exposes run creation and retrieval
      endpoints, supports validated output for strict instruction following,
      and orchestrates RAG, web search, file libraries, MCP tools, and custom
      HTTP tools.
    humanURL: https://docs.ai21.com/docs/maestro
    baseURL: https://api.ai21.com/studio/v1
    tags:
      - Maestro
      - Planning
      - Agents
      - Validated Output
    properties:
      - type: Documentation
        url: https://docs.ai21.com/docs/maestro
  - aid: ai21-labs:library
    name: AI21 File Library API
    description: >-
      Managed file storage for RAG workflows. Upload, list, retrieve, update,
      and delete documents that Maestro and Jamba endpoints can ground on at
      inference time.
    humanURL: https://docs.ai21.com/reference
    baseURL: https://api.ai21.com/studio/v1
    tags:
      - Files
      - RAG
      - Library
      - Documents
    properties:
      - type: Documentation
        url: https://docs.ai21.com/reference
  - aid: ai21-labs:batch
    name: AI21 Batch API
    description: >-
      Asynchronous batch processing for large volumes of Jamba completions.
      Submit a batch job, poll for status, and download results when the run
      completes.
    humanURL: https://docs.ai21.com/reference
    baseURL: https://api.ai21.com/studio/v1
    tags:
      - Batch
      - Async
      - Inference
    properties:
      - type: Documentation
        url: https://docs.ai21.com/reference
  - aid: ai21-labs:fine-tuning
    name: AI21 Fine-Tuning API
    description: >-
      Fine-tuning service for Jamba models supporting full, LoRA, and QLoRA
      strategies. Create training jobs from uploaded datasets and deploy the
      resulting model variants behind the standard chat completions endpoint.
    humanURL: https://docs.ai21.com/docs/fine-tuning
    baseURL: https://api.ai21.com/studio/v1
    tags:
      - Fine-Tuning
      - LoRA
      - QLoRA
      - Training
    properties:
      - type: Documentation
        url: https://docs.ai21.com/docs/fine-tuning
  - aid: ai21-labs:python-sdk
    name: AI21 Python SDK
    description: >-
      Official Python SDK (ai21 on PyPI) wrapping the AI21 Studio REST API with
      sync and async clients, streaming support, LangChain / LlamaIndex
      integrations, and helpers for chat, Maestro, library, and batch.
    humanURL: https://github.com/AI21Labs/ai21-python
    baseURL: https://github.com/AI21Labs/ai21-python
    tags:
      - SDK
      - Python
      - PyPI
    properties:
      - type: Repository
        url: https://github.com/AI21Labs/ai21-python
  - aid: ai21-labs:typescript-sdk
    name: AI21 TypeScript / JavaScript SDK
    description: >-
      Official TypeScript and JavaScript client for the AI21 Studio API, with
      typed request and response models and streaming helpers for browser and
      Node.js runtimes.
    humanURL: https://github.com/AI21Labs/ai21-typescript
    baseURL: https://github.com/AI21Labs/ai21-typescript
    tags:
      - SDK
      - TypeScript
      - JavaScript
    properties:
      - type: Repository
        url: https://github.com/AI21Labs
  - aid: ai21-labs:huggingface
    name: AI21 Jamba on Hugging Face
    description: >-
      Open-weight releases of the Jamba family on Hugging Face for self-hosted
      inference via vLLM, Transformers, and other runtimes.
    humanURL: https://huggingface.co/ai21labs
    baseURL: https://huggingface.co/ai21labs
    tags:
      - Hugging Face
      - Open Weights
      - Jamba
      - Self-Hosted
    properties:
      - type: Repository
        url: https://huggingface.co/ai21labs
common:
  - type: Website
    url: https://www.ai21.com/
  - type: Documentation
    url: https://docs.ai21.com/
  - type: APIReference
    url: https://docs.ai21.com/reference
  - type: GitHubOrganization
    url: https://github.com/AI21Labs
  - type: HuggingFace
    url: https://huggingface.co/ai21labs
  - type: Blog
    url: https://www.ai21.com/blog/
  - type: Pricing
    url: https://www.ai21.com/pricing/
  - type: ChangeLog
    url: https://docs.ai21.com/changelog
  - type: LinkedIn
    url: https://www.linkedin.com/company/ai21/
  - type: X
    url: https://x.com/AI21Labs
maintainers:
  - FN: Kin Lane
    email: [email protected]