Vela

Vela 4 is here — our most capable reasoning model yet, pairing long-horizon planning with a far broader pretraining corpus.

( Products )

Reasoning in everyone’s hands

Vela

Vela is your working companion — on the web, iOS and Android. Ask it to read, plan, or reason through the hard part.

Open Vela

API

Ship Vela into your own product with streaming, tool calls, structured output and long-context retrieval.

Get a key

Developer docs

Install Vela in a few lines, then follow end-to-end guides for agents, evals and production rollouts.

Read the docs
Chart what is still unknown
Vela Ultra

Go further with Vela. Higher rate limits, early models and priority compute — from $28 a month.

Start a plan

( Blog )

Latest news

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Vela 4 Beta — the age of long-horizon agents

An early preview of Vela 4, our most capable reasoning model, pairing multi-step planning with a far broader pretraining corpus and 340k context.

Vela 4

Meridian Labs raises $4.2B Series D

We are partnering with Kestrel Global, Ninefold Partners, Arbor Grove Capital, Highfield Trust, Tessellate Ventures and Long River Equity, amongst others.

Series D

Bringing Vela to every device

Vela is now faster and sharper, with improved multilingual support across 63 languages. Available today on web, mobile and the desktop app.

Vela for all