Open source
Self-hosted Nucleus
Free
Run the Nucleus core on your own computers and servers.
- Your own machines and compute
- You manage installation and operation
- No managed subscription
Nucleus: AI-Managed Private Cloud
Nucleus software.
Positronic management.
Install it yourself, or have us operate it.
Run open-source Nucleus yourself, or choose Positronic, the paid managed service powered by Nucleus. Nucleus manages machines, approved open-source models, workload placement, and shared organization context. Start with your own computers and servers, or add dedicated servers supplied and operated by Positronic. Both paid plans include approved text model serving and shared organization context.
All prices in USD. Parallax bills paid plans monthly per organization. See Positronic pricing.
Already subscribed? Manage billing
The current alpha adds approved CPU text model installation and serving, shared organization documents, and scoped API and MCP access. Models run on your configured workers; readiness is reported by the machine.
Powered by Nucleus
Managed
$99/ month
per organization
5 managed machines included.
- $29 / month for each additional machine
- Approved Hugging Face text model installation and serving
- Shared organization documents and source citations
- NEBULA cluster management included when available
Sign in with NEXUS and choose your organization to manage your subscription. Hardware charges are separate.
Powered by Nucleus
Unlimited
$299/ month
per organization
Unlimited managed machines for one organization.
- The same model and context services as Managed
- A flat monthly management price
- NEBULA cluster management included when available
- Dedicated servers are quoted separately
Sign in with NEXUS and choose your organization to manage your subscription. Hardware charges are separate.
Included in both paid plans
Models and shared organization context
Both Positronic plans cover the same service. Choose a plan by the number of machines you want managed.
- Approved open-source models
- Choose an approved catalog model with its exact checksum, revision, and license. Install it on an eligible online worker after local owner approval.
- Model serving and agent access
- Run text generation on your organization’s configured CPU workers. Connect Slipstream or another client through scoped API keys and the Nucleus MCP endpoint.
- Organization-level Context-as-a-Service
- Create, import, and search organization text and Markdown documents. Context search and model responses return source citations.
Monthly management cost
Compare your monthly price
The subscription covers Nucleus management and the model and context services above. Your machines supply the compute.
5 are included with Managed. Enter 1–1,000 machines.
Enter a whole number from 1 to 1,000.
Price shown for 5 machines.
Monthly estimate for planning. Server charges are additional.
Managed
- Base plan 5 machines included
- $99
- Additional machines 0 above the included 5
- $0
- Monthly total
- $99
Unlimited
Unlimited managed machines
$299/ month
Servers and setup
Dedicated servers and setup
Parallax bills you for Positronic managed service and any dedicated servers we supply. Server charges are quoted separately.
- Dedicated servers
- Positronic supplies and operates servers we resell from traditional dedicated-server partners. Ask us about the configuration and capacity you need; Parallax quotes and bills the customer.
- Setup and migration
- Quoted separately.
- Server billing
- Parallax quotes and bills for the servers we supply. Server charges are additional to the management-plan prices above.
Questions about the plans
Can I self-host Nucleus for free?
The open-source core is the free option for operating Nucleus yourself. You supply the hardware and manage its operation.
What happens after 5 machines?
Each additional machine on Managed adds $29 per month. You can also choose Unlimited at $299 per month for one organization.
Is NEBULA cluster management a separate subscription?
No. NEBULA cluster management is included in both paid Positronic plans. There is no separate NEBULA management fee. Hosted cluster provisioning is not yet available. Servers supplied by Parallax are quoted and billed separately.
What does Unlimited include?
Unlimited refers to the number of managed machines for one organization. Model throughput depends on the hardware. Shared context supports up to 200 documents and 5 MiB per organization, with 64 KiB per document. Server charges are additional to management fees and are quoted and billed by Parallax.
Is shared organization context a separate subscription?
Shared organization context is included in both paid Positronic plans. The current service supports text and Markdown documents, with up to 200 documents, 64 KiB per document, and 5 MiB per organization. An owner or admin manages documents; organization members can read them.
Do the plans include dedicated servers?
The prices above cover management of your Nucleus fleet. If you need additional hardware, Parallax can source and resell dedicated servers. Server charges are additional to management fees and are quoted and billed by Parallax.
How do I install Nucleus?
Install it now for Linux or WSL2. The current alpha supports node pairing, hosted enrollment, resource telemetry, and explicitly configured CPU model workers. Follow the versioned agent installation guide, then use the dashboard for approved model installation and shared organization context.