Both are open source harness options with comparable terms, so the choice comes down to which model of the problem you prefer — compare the descriptions below rather than the licence.
Prime Intellect's recursive-language-model harness — a persistent IPython kernel is the only tool, sub-agents are function calls.
Drops fixed tool schemas and context compaction: the agent writes programs over its own context, and can CRUD its own prompts, skills and sub-agents mid-run.
Everything is a plugin — the model adapter, the tool registry, the sandbox and the agent loop itself are all swappable.
Web UI first — `dsh web` serves on 127.0.0.1:3080 rather than taking over the terminal. Built on Cordis. Still a developer preview: DeepSeek warns of compatibility-breaking changes, so pin the version.
| Prime Agent | DeepSeek Harness | |
|---|---|---|
| Licence | Open source | Open source |
| Pricing | open source | open source |
| Self-hostable | Yes | Yes |
| Languages | Any language | TypeScript |
| Install | curl -fsSL https://app.primeintellect.ai/prime-agent/install.sh | sh | npx @deepseek-ai/dsh web |
| Keys required | None | None |
Both are open source harness options with comparable terms, so the choice comes down to which model of the problem you prefer — compare the descriptions below rather than the licence. Prime Agent: Prime Intellect's recursive-language-model harness — a persistent IPython kernel is the only tool, sub-agents are function calls. DeepSeek Harness: Everything is a plugin — the model adapter, the tool registry, the sandbox and the agent loop itself are all swappable.
Prime Agent can run on your own infrastructure. DeepSeek Harness can run on your own infrastructure.
Prime Agent is open source (open source). DeepSeek Harness is open source (open source).
Every page here answers to Accept: text/markdown and returns the same content at roughly a tenth the tokens. No separate site, no toggle — same URL.
curl -s -H "Accept: text/markdown" https://newagent.build/compare/prime-agent-vs-deepseek-harness