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
accessModel:
  pricing: free
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Free · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
position: Provider
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/ai21-labs.png
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: '2026-05-29'
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
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/ai21-labs/refs/heads/main/asyncapi/ai21-labs-asyncapi.yml
  - url: graphql/ai21-labs-graphql.md
    type: GraphQL
- 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
- aid: ai21-labs:ai21-labs-chat-api
  name: AI21 Labs Chat API
  description: The Chat API from AI21 Labs — 1 operation(s) for chat.
  humanURL: https://docs.ai21.com/reference
  baseURL: https://api.ai21.com/studio/v1
  tags:
  - Chat
  properties:
  - type: OpenAPI
    url: openapi/ai21-labs-chat-api-openapi.yml
- aid: ai21-labs:ai21-labs-library-api
  name: AI21 Labs Library API
  description: The Library API from AI21 Labs — 1 operation(s) for library.
  humanURL: https://docs.ai21.com/reference
  baseURL: https://api.ai21.com/studio/v1
  tags:
  - Library
  properties:
  - type: OpenAPI
    url: openapi/ai21-labs-library-api-openapi.yml
- aid: ai21-labs:ai21-labs-maestro-api
  name: AI21 Labs Maestro API
  description: The Maestro API from AI21 Labs — 2 operation(s) for maestro.
  humanURL: https://docs.ai21.com/reference
  baseURL: https://api.ai21.com/studio/v1
  tags:
  - Maestro
  properties:
  - type: OpenAPI
    url: openapi/ai21-labs-maestro-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/ai21-labs-agentic-access.yml
- type: DomainSecurity
  url: security/ai21-labs-domain-security.yml
- type: Authentication
  url: authentication/ai21-labs-authentication.yml
- 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
- type: LlmsText
  url: https://docs.ai21.com/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com