OB-1

In plain words

OB-1 is an open-source coding agent that runs in the terminal without requiring an account, card, or API key. It edits code and automatically checks its own work against project tests until they pass. The free tier routes through 162 models across 22 providers, while paid plans use prepaid credits with hard caps to prevent unexpected bills. Developers can install it immediately and begin coding without setup barriers.

written from the facts on this page · September 2026

From the sources

OB-1 is an open-source coding agent for your terminal. Install it and start with no account, no card, no API key. Its free tier is a router built into the CLI that pools 162 free models across 22 providers, so no single vendor can pull the plug. After every change it runs your project's checks and fixes what broke until they pass. For frontier models, paid plans are prepaid credits, hard-capped, so no bill can run past the number you set. Install: brew install overbrilliant/tap/ob1

OB-1 is an open-source coding agent for your terminal that needs no account, no card, and no API key — unlike Antigravity and Codex. It edits your code and checks its own work until the tests pass.

Gemini CLI now routes its free tier through Antigravity, and Codex's free plan wants a login. OB-1 asks for nothing: no account, no card, no API key. It runs in your terminal, edits your code, and checks its own work — install it and start. ██████╗ ██████╗ ██╗ ██╔═══██╗██╔══██╗ ███║ ██║ ██║██████╔╝═══ ╚██║ ██║ ██║██╔══██╗ ██║ ╚██████╔╝██████╔╝ ██║ ╚═════╝ ╚═════╝ ╚═╝ OB-1 free, multi-agent, token-efficient coding agent · v0.3.4 ────────────────────────────────────────────────────── /help commands · /models setup · press / for menu The actual startup screen — and a real session. It stops only when the checks pass. Everything below ships in the free tier. No feature gates on the fundamentals.…from overbrilliant.com

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