Prime Agent is an open-source terminal coding and research agent from Prime Intellect built around Recursive Language Models.
A persistent Python REPL is its built-in tool, so file operations, shell commands, context management and child subagents all run as code, while a daemon keeps sessions alive for long-running, autonomous work.
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Persistent Python REPL as the model's programmatic tool surface
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Built-in recursive subagents via rlm.spawn() with direct agent-to-agent messaging
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Daemon-backed sessions that survive terminal disconnects and can be reattached
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Persistent goals, heartbeats, schedules and a budgeted autonomous mode with quality gates
- 05
/refine Continual Harness that stores reviewable lessons as prompts, memories and skills
Open Source
Prime Agent is fully open source under the MIT License and free to install; users bring their own model access by logging in with a supported subscription or API-key provider and pay that provider for usage.
Best for
Developers and researchers running long-horizon coding, evaluation or research tasks who want a scriptable, self-improving harness with background sessions and parallel subagents.
Not ideal for
Users who need a sandboxed or IDE-integrated assistant; it executes model-generated Python and project commands with the user's own permissions and is still shipping beta builds.
A distinctive, research-grade coding harness that treats everything as code and is built for work that outlives a single chat window; best suited to power users comfortable with an evolving beta.
Prime Agent is shipping frequent v0.9.9 beta builds through its one-command installer, alongside the Prime Agent paper (arXiv 2608.23552) describing the self-improving RLM harness.
As of
Is Prime Agent free?+
Yes - Prime Agent is Open Source. Prime Agent is fully open source under the MIT License and free to install; users bring their own model access by logging in with a supported subscription or API-key provider and pay that provider for usage.
Is Prime Agent open source?+
Yes - Prime Agent is open source. Prime Agent is fully open source under the MIT License and free to install; users bring their own model access by logging in with a supported subscription or API-key provider and pay that provider for usage.
Who is Prime Agent best for?+
Developers and researchers running long-horizon coding, evaluation or research tasks who want a scriptable, self-improving harness with background sessions and parallel subagents.
Who is Prime Agent not ideal for?+
Users who need a sandboxed or IDE-integrated assistant; it executes model-generated Python and project commands with the user's own permissions and is still shipping beta builds.
What are the best Prime Agent alternatives?+
The closest Prime Agent alternatives on ai.dosa.dev are Claude Code, Codex CLI, Amp - all listed under Terminal & CLI Agents.
Who makes Prime Agent?+
Prime Agent is developed by Prime Intellect. It is listed in the Terminal & CLI Agents category on ai.dosa.dev.
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