Marvy-3
The ServiceNow delivery specialist.
A proprietary 220B model for ServiceNow requirements, platform assessment, CSDM data modelling, CMDB assessment, solution design, and implementation. Join the waitlist to request managed Marvy API access.
A ServiceNow specialist and a frontier reference model.
Claude Fable 5 by Anthropic is used here as a frontier reference model. This is an operating-fit, integration, and published base-rate comparison, not a head-to-head quality benchmark.
Compare base rates directly.
Marvy-3 is 70% lower for input and 86% lower for output than Claude Fable 5 when token volumes are equal.
A planning estimate rather than a guaranteed quantity. Actual usage varies with scope, source material, iteration, and output volume.
Marvy-3 is about 83% lower in this equal-volume blended example.
Base-rate comparison
Input tokens
About 70% lowerOutput tokens
About 86% lowerUSD per 1M tokens. Equal-volume illustration; excludes caching, batch pricing, taxes, infrastructure, support, and negotiated terms.
From requirement to production.
Marvy-3 supports the work from requirements and platform assessment through data modelling, solution design, implementation, and production.
Requirements
Turns stakeholder input into structured requirements, constraints, acceptance criteria, and delivery scope.
Platform Assessment
Reviews platform architecture, configuration, integrations, technical debt, and delivery risks.
CSDM Data Modelling
Designs CSDM-aligned service and application models, ownership, lifecycle, and relationships.
CMDB Assessment
Assesses CI quality, class usage, relationships, reconciliation, governance, and model gaps.
Solution Design
Produces architecture decisions, integration patterns, controls, and implementation plans.
Implementation
Creates configuration guidance, scripts, tests, deployment steps, and production-ready artefacts.
Managed Marvy API access.
Marvy-3 is available through a managed API agreement. Join the waitlist to request access. The model weights are not distributed publicly.
Marvy-3 API
Connect Marvy-3 to approved internal applications and delivery workflows. Authentication, data handling, limits, and support are agreed during onboarding.
Join API Waitlist[ Marvy-3 FAQ ]
Marvy-3 is MainStack's proprietary 220B model for ServiceNow delivery work. It supports requirements, platform assessment, CSDM data modelling, CMDB assessment, solution design, implementation, testing, and production delivery.
Claude Fable 5 by Anthropic is used as a frontier reference model for long-running knowledge work and coding. This page compares operating fit, integration, and published base rates; it is not a head-to-head quality benchmark. Marvy-3 is positioned specifically for ServiceNow deliverables.
Marvy-3 reference API base rates are $3 per 1M input tokens and $7 per 1M output tokens. Claude Fable 5's published base rates are $10 input and $50 output per 1M tokens. MainStack's internal usage estimate is ~4M tokens per end-to-end project. This is a planning estimate, not a guaranteed quantity.
Join the Marvy API waitlist to request managed Marvy-3 access. MainStack reviews each request before onboarding. The model weights are not distributed publicly.
Yes. Marvy-1 and public Marvy-2 releases remain available through MainStack on Hugging Face. Marvy-3 is the proprietary model tier.
Join the Marvy API waitlist.
Register your interest in managed Marvy-3 API access. MainStack reviews each request and follows up about onboarding, data handling, limits, and support.
Request managed API access
Complete the three fields below to join the Marvy API waitlist.