OB-1 is an open-source, terminal-first coding agent that features persistent, inspectable project memory and a self-correcting test-passing loop.
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It uses multi-agent orchestration modes and built-in model routing to automate development tasks while allowing users to choose between free local/cloud models or hosted frontier services.
- 01
Embedded free-models router with no account required
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Persistent project memory stored in a local SQLite graph
- 03
Self-correcting loop that runs project checks after file edits
- 04
Multi-agent modes including Solo, Fusion best-of-N, and refute-review
- 05
Support for custom endpoints and local models via OpenAI-compatible APIs
Freemium
OB-1 offers a free tier that functions without accounts or API keys using an embedded free-models router. Paid tiers provide hosted frontier models via prepaid, hard-capped credits starting at $9 per month, which never incur overage charges.
Best for
Developers who prefer terminal-based workflows and require durable, inspectable project memory with a hard-capped, predictable spending model.
Not ideal for
Users who prefer a fully integrated graphical IDE experience with native inline tab completion, or those who require complex enterprise role-based access controls.
OB-1 is a highly capable, privacy-conscious terminal agent that stands out for its unique 'no-account' setup and its commitment to transparent, hard-capped billing, making it an excellent choice for users who want to avoid surprise costs.
Version 0.3.7 introduced background refreshing for the free-model catalog and clarified access timing for new free models. Previous updates integrated the Auto execution mode, unified the Fusion orchestration path, and added in-session authentication commands.
As of
Is OB-1 free?+
OB-1 is Freemium. OB-1 offers a free tier that functions without accounts or API keys using an embedded free-models router. Paid tiers provide hosted frontier models via prepaid, hard-capped credits starting at $9 per month, which never incur overage charges. Check the official site for current plans.
Is OB-1 open source?+
Yes - OB-1 is open source. OB-1 offers a free tier that functions without accounts or API keys using an embedded free-models router. Paid tiers provide hosted frontier models via prepaid, hard-capped credits starting at $9 per month, which never incur overage charges.
How much does OB-1 cost?+
OB-1 offers a free tier that functions without accounts or API keys using an embedded free-models router. Paid tiers provide hosted frontier models via prepaid, hard-capped credits starting at $9 per month, which never incur overage charges. Pricing changes often - verify on the official site.
Who is OB-1 best for?+
Developers who prefer terminal-based workflows and require durable, inspectable project memory with a hard-capped, predictable spending model.
Who is OB-1 not ideal for?+
Users who prefer a fully integrated graphical IDE experience with native inline tab completion, or those who require complex enterprise role-based access controls.
What are the best OB-1 alternatives?+
The closest OB-1 alternatives on ai.dosa.dev are Claude Code, Codex CLI, Amp - all listed under Terminal & CLI Agents.
Who makes OB-1?+
OB-1 is developed by Overbrilliant. It is listed in the Terminal & CLI Agents category on ai.dosa.dev.
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