One API for frontier models,
on portfolio terms.

OpenGa^3in routes your requests to capacity Ga^3in VC negotiates directly with model providers. Better prices for portfolio companies, one key, one ledger, no subscriptions.

Get API Key Discover Models

Prompts or completions stored

1 line

Code change to migrate

Claude models live

Invite

Portfolio companies only

Zero retention is enforced in configuration and verifiable on your own account: see data handling. OpenGa^3in is pre-production and invite only; we publish no usage or uptime figures until they are measured over a full period.

Change one line

OpenAI and Anthropic SDK compatible. Point base_url at the gateway, paste a key, ship. No rewrites.

Portfolio pricing

Fund level allocations passed through at your negotiated rate. Prepaid credits, budgets, alerts, one monthly statement.

Zero payload retention

Prompts and completions are never stored. We log metadata only: model, tokens, cost, latency. See exactly what we record.

Quickstart

# works with the OpenAI SDK
client = OpenAI(
    api_key="ga3-...",
    base_url="https://gain.ventures/api/v1",
)
r = client.chat.completions.create(
    model="anthropic/claude-sonnet-5",
    messages=[{"role": "user", "content": "hello"}],
)

Anthropic native SDKs work through the same gateway at /api/v1/messages. Prompts and completions are never stored.

Request access

Invite only. Portfolio companies are onboarded one at a time.