aid: asterlab
name: Asterlab
description: >-
  Aster (Aster AI Labs, PBC), operating as Asterlab, is a San Francisco based Y Combinator
  (Spring 2026) public benefit corporation building autonomous research systems that coordinate
  thousands of AI research agents working in parallel to automate open-ended scientific discovery.
  The company used that same autonomous-research system to optimize its own inference stack and now
  offers Aster Inference, an OpenAI-compatible inference API serving open-weight models (gpt-oss-120b,
  gpt-oss-120b-fast, and Z.ai's GLM 5.2) at what it benchmarks as the fastest gpt-oss-120b output
  speed on GPU (644 tok/s). The API works with the official OpenAI Python and JS SDKs, LangChain,
  LiteLLM, Cursor, the Vercel AI SDK, and most agent frameworks by pointing the base URL at
  https://api.asterlab.ai/v1, with zero data retention by default.
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://www.asterlab.ai/og/default.png
url: https://raw.githubusercontent.com/api-evangelist/asterlab/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Artificial Intelligence
- Machine Learning
- LLM
- Inference
- OpenAI Compatible
- Autonomous Research
- GPU
- Developer Tools
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Aster Inference API
  description: >-
    OpenAI-compatible inference API from Aster serving open-weight models (gpt-oss-120b,
    gpt-oss-120b-fast, GLM 5.2). Authenticate with an Aster API key created in the inference
    console and set the base URL to https://api.asterlab.ai/v1; works with the OpenAI SDKs,
    LangChain, LiteLLM, and most agent frameworks. Zero data retention by default.
  humanURL: https://www.asterlab.ai/inference
  baseURL: https://api.asterlab.ai/v1
  tags:
  - Inference
  - LLM
  - OpenAI Compatible
  properties:
  - type: Authentication
    url: authentication/asterlab-authentication.yml
  - type: Conventions
    url: conventions/asterlab-conventions.yml
common:
- type: DeveloperPortal
  url: https://www.asterlab.ai/inference/console
- type: Documentation
  url: https://www.asterlab.ai/inference
- type: GettingStarted
  url: https://www.asterlab.ai/inference
- type: Pricing
  url: https://www.asterlab.ai/inference
- type: SignUp
  url: https://www.asterlab.ai/inference/console
- type: TermsOfService
  url: https://www.asterlab.ai/terms
- type: PrivacyPolicy
  url: https://www.asterlab.ai/privacy
- type: Blog
  url: https://www.asterlab.ai/research/scaling_autonomous_research_to_thousands_of_agents
- type: Support
  url: mailto:info@asterlab.ai
- type: Authentication
  url: authentication/asterlab-authentication.yml
- type: Conventions
  url: conventions/asterlab-conventions.yml
- type: WellKnown
  url: well-known/asterlab-well-known.yml
- type: LLMsTxt
  url: llms/asterlab-llms.txt
- type: DomainSecurity
  url: security/asterlab-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence