Prime Agent
Coding Agents · Free
Self-improving open-source agent harness from Prime Intellect
At a glance
- Made by
- Prime Intellect
- Korean
- None (English and a few others only)
- Available on
- CLI, Windows
- Open source
- Open source (license name not stated)
- GitHub
- 22,006 stars · NOASSERTION
What is Prime Agent?
Prime Agent uses a persistent IPython kernel (REPL) as its only tool and handles file operations, shell commands, and subagent calls through code. It launches subagents in parallel and in the background, and agents exchange messages directly with each other. It fixes its own harness state, such as prompts, skills, memory, and subagents, based on execution records. A background daemon keeps sessions alive so work continues even if the terminal is disconnected.
- Programmatic tool and subagent calls based on a persistent Python REPL
- Run subagents in parallel and in the background with rlm
- Self-improvement of harness state with /refine (rollback supported)
- Skills in the form of executable Python packages
- Session management with a background daemon and Agents View
- Direct messages between agents
- Long-running tasks with automatic compaction, scheduling, and autonomous mode
Who uses Prime Agent and for what
- General coding assistant
- Default runtime for long-horizon autonomous evaluation
- Research and automated research collaboration
Pricing
Freemium (free + paid subscription)
Typically offers a free/low-cost plan for individuals and paid plans for teams and enterprises (varies by tool)
Estimate based on AI knowledge - please verify on the official site
AI tools similar to Prime Agent (alternatives)
Prime Agent vs. alternatives at a glance
| AI | Pricing | Combos on the map | Connected tools | Free | Cheapest monthly | Korean |
|---|---|---|---|---|---|---|
| Prime Agent | Free | 0 | 5 | — | — | No |
| Aider | Free | 0 | 17 | — | — | No |
| Charm | Free + paid | 0 | 17 | — | — | No |
| Cline | Free + paid | 0 | 17 | Yes | $9.99/mo | No |
1 of these 4 tools have a free plan. Cheapest paid plan: Cline ($9.99/mo).
Combo and connection counts are based on the relationships recorded on AI Galaxy Map (2026-10-26); they are not a quality ranking.
Prime Agent on AI Galaxy Map
- One of 50 AI tools in the Coding Agents field.
- Connected to 5 other tools — #16 in its field.
Frequently asked questions
Can I use Prime Agent for free?
Freemium (free + paid subscription). Prices can change, so check the official site before paying.
What AI can I use instead of Prime Agent?
Tools that do the same job, such as Aider, Charm, Cline, Claude Code, are connected to it on the map.
Can I use Prime Agent in Korean?
None (English and a few others only)
Sources (official pages)
Checked on the official pages on 2026-10-14. Prices and features can change, so check the official site again before paying.