01.AI

01.AI, founded by Kai-Fu Lee, is the creator of the Yi family of open-source and proprietary LLMs. The Lingyiwanwu open platform exposes OpenAI-compatible inference for Yi-Lightning, Yi-Lightning-Lite, Yi-Large, and Yi-Vision.

01.AI publishes 1 API on the APIs.io network: Chat API. Tagged areas include Artificial Intelligence, LLM, Yi, Open-Source, and Foundation Models.

01.AI’s developer surface includes authentication, documentation, GitHub presence, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

33.2/100 thin ▬ flat Agent 20/100 agent aware saas Full breakdown ↓
scored 2026-09-10 · rubric v0.20.0

AccessFreemiumSelf serve⚡ Free to try

1 APIs

Artificial Intelligence LLMYiOpen-Source Foundation Models Inference

Kin Score

Kin Score How this is scored →
scored 2026-09-10 · rubric v0.20.0

Composite quality — 33.2/100 · thin

Contract Quality 12.2 / 23

Developer Ergonomics 4.3 / 18

Access Clarity 6.6 / 18

Operational Transparency 1.2 / 12

Contract Governance 0.0 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/01-ai: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

Lingyiwanwu Platform API

OpenAI-compatible chat completions and vision endpoints for the Yi model family. Base URL https://api.lingyiwanwu.com/v1. Available models include Yi-Lightning, Yi-Lightning-Lit...

01.AI Chat API

OpenAI-compatible chat completions for Yi text and vision models.

Open Collections 3

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Lingyiwanwu Platform Chat API

OPEN COLLECTION

Lingyiwanwu Platform API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

01 Ai Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

01 Ai Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

01 Ai Finops

FINOPS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

01 Ai Authentication

http · 1 scheme

SECURITY

01 Ai Domain Security

TLSv1.3 · HSTS

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

01 Ai Agentic Access

1 operation · 1 acting

1 operations · 1 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Review

Review

Source (apis.yml)

aid: 01-ai
url: https://raw.githubusercontent.com/api-evangelist/01-ai/refs/heads/main/apis.yml
name: 01.AI
kind: company
description: 01.AI, founded by Kai-Fu Lee, is the creator of the Yi family of open-source and proprietary LLMs. The Lingyiwanwu
  open platform exposes OpenAI-compatible inference for Yi-Lightning, Yi-Lightning-Lite, Yi-Large, and Yi-Vision.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/01-ai.png
tags:
- Artificial Intelligence
- LLM
- Yi
- Open-Source
- Foundation Models
- Inference
tags_raw:
- AI
- LLM
- Yi
- Open Source
- Foundation Models
- Inference
created: '2026-05-08'
modified: '2026-05-29'
specificationVersion: '0.23'
apis:
- aid: 01-ai:platform
  name: Lingyiwanwu Platform API
  description: OpenAI-compatible chat completions and vision endpoints for the Yi model family. Base URL https://api.lingyiwanwu.com/v1.
    Available models include Yi-Lightning, Yi-Lightning-Lite, Yi-Large, Yi-Large-Turbo, and Yi-Vision.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://platform.lingyiwanwu.com/docs
  baseURL: https://api.lingyiwanwu.com/v1
  tags:
  - Artificial Intelligence
  - LLM
  - Chat Completions
  - Vision
  - OpenAI-Compatible
  - Yi
  tags_raw:
  - AI
  - LLM
  - Chat Completions
  - Vision
  - OpenAI Compatible
  - Yi
  properties:
  - type: Documentation
    url: https://platform.lingyiwanwu.com/docs
  - type: Signup
    url: https://platform.lingyiwanwu.com/
  - type: GitHub
    url: https://github.com/01-ai/Yi
  - type: TechBlog
    url: https://01-ai.github.io/
  - type: Pricing
    url: https://platform.lingyiwanwu.com/
- aid: 01-ai:01-ai-chat-api
  name: 01.AI Chat API
  description: OpenAI-compatible chat completions for Yi text and vision models.
  humanURL: https://platform.lingyiwanwu.com/docs
  baseURL: https://api.lingyiwanwu.com/v1
  tags:
  - Chat
  properties:
  - type: OpenAPI
    url: openapi/01-ai-chat-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/01-ai-agentic-access.yml
- type: DomainSecurity
  url: security/01-ai-domain-security.yml
- type: Authentication
  url: authentication/01-ai-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/01-ai
- type: Website
  url: https://www.01.ai/
- type: Documentation
  url: https://platform.lingyiwanwu.com/docs
- type: GitHub
  url: https://github.com/01-ai
- type: Plans
  url: plans/01-ai-plans-pricing.yml
- type: RateLimits
  url: rate-limits/01-ai-rate-limits.yml
- type: FinOps
  url: finops/01-ai-finops.yml
- type: Review
  url: review.yml
- url: https://www.lingyiwanwu.com/blog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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