Prime Intellect, a San Francisco-based builder of the Open Superintelligence Stack, has raised $130 million in Series A funding led by Radical Ventures, with participation from NVIDIA Ventures, Intel Capital, and Dell Technologies Capital. The platform integrates GPU compute marketplaces, large-scale reinforcement learning training, hosted evaluations, sandboxed environments, and inference serving so enterprises can train and deploy custom AI agents on their own data. Total funding now exceeds $150 million at a $1B valuation.
Enterprise AI Shifts Toward Owned Models
The round arrives as enterprises seek alternatives to closed frontier labs. Ramp trained a 35-billion-parameter model on the platform that outperformed Claude Opus on spreadsheet search while running 27% faster than Claude Haiku at lower cost. Customers including Zapier, Character.ai, and Browserbase now run production agents without sending proprietary data to OpenAI or Anthropic.
RL Infrastructure Unlocks Custom Agents
Current solutions force companies to choose between expensive frontier APIs or building complex distributed training infrastructure from scratch. Prime Intellect addresses this by providing a full loop: 2,500+ community RL environments, asynchronous prime-rl training supporting 1B to 70B+ parameter models, secure sandboxes, and pay-per-token LoRA inference that feeds production traces back into training runs.
Radical Ventures Leads Strategic Round
Radical Ventures led the round alongside hardware strategics NVIDIA, Intel, and Dell. The investor mix signals conviction that reinforcement learning infrastructure will drive demand for next-generation chips beyond hyperscaler data centers. NVIDIA's collaboration already integrates Prime tools into the Nemotron open model initiative.
AI Agent and RL Markets Accelerate
The AI agents market is projected to grow from $10.9 billion in 2026 to $182.9 billion by 2033 at a 49.6% CAGR, while the reinforcement learning market is expected to expand from $16.2 billion to $111.1 billion over the same period. Prime Intellect sits at the intersection of these high-growth segments plus the $117.8 billion AI inference market.
Competitors include Together AI, which raised $800 million in a July 2026 Series C at an $8.3 billion valuation, Fireworks AI with a $250 million Series C at $4 billion valuation in October 2025, and Baseten, which closed a $1.5 billion Series F at $13 billion valuation in June 2026.
Platform Validated by Rapid Traction
The company reached $100 million in annualized revenue and 6,000 customers within roughly two years of founding in 2024. Its INTELLECT-3 100B+ MoE model, trained entirely on the platform, achieved state-of-the-art results for its size across math, code, and reasoning benchmarks.
As Radical Ventures partner David Katz noted:
"They've stitched this together and built it in such a way that they're operating at the frontier in a way that's affordable."
CEO Vincent Weisser framed the broader mission:
"It shouldn't just be a few nerds in a glass tower in San Francisco that have the capability to train AI models. It should be every enterprise, every nation state."