Model Announcement
Claude Sonnet 4.5 Now Available in Heavy
Breakthrough performance meets production reliability. Deploy Anthropic's most capable model through Heavy's intelligent orchestration framework.
Starting today, Claude Sonnet 4.5 is available in Heavy—Anthropic's breakthrough model that sets new standards for reasoning, coding, and complex task execution, now amplified by Heavy's production-grade orchestration framework.
Why This Matters
Raw Capability Meets Production Reliability
Claude Sonnet 4.5 delivers exceptional performance on complex reasoning tasks. Heavy transforms that raw capability into production-ready economic value through intelligent context management, verification loops, and seamless tool integration.
Context Engineering at Scale
Sonnet 4.5 shows remarkable context awareness—proactively managing its token budget and maintaining coherence across long-running tasks. Heavy's orchestration framework prevents "context anxiety" that causes shortcuts, ensuring agents finish multi-hour workflows with production-grade artifacts.
Verification That Compounds
While Sonnet 4.5 excels at self-testing and creating feedback loops, Heavy adds comprehensive verification systems that catch compounding errors before they cascade—turning impressive model capabilities into reliable business outcomes.
What You Can Build Now
Complex Code Generation
From architectural design to multi-file refactors—Sonnet 4.5 with Heavy handles sophisticated engineering tasks with verification at every step.
Research & Analysis
Deep research across multiple sources with citation verification, competitor analysis, and comprehensive market reports—all production-ready.
Document Generation
Legal briefs, technical documentation, executive summaries—professional-grade deliverables crafted with context awareness and quality gates.
Data Workflows
SQL generation, analysis pipelines, visualization creation—turn natural language into production data workflows with automated validation.
The Heavy Advantage
Frontier models like Claude Sonnet 4.5 achieve near-parity with human experts on real-world tasks. Heavy's orchestration framework makes that expertise deployable at scale:
- →Context engineering that prevents shortcuts under token pressure
- →Verification loops that catch compounding errors before they cascade
- →Tool orchestration that maintains coherent execution across multi-hour workflows
- →Production reliability that transforms demos into dependable business systems
Get Started Today
Claude Sonnet 4.5 is now available across all Heavy workspaces. Existing users can select it from the model picker in any agent or workflow. New to Heavy? Start with our comprehensive guide.
About Heavy: Heavy is Opulent OS's production-grade orchestration framework that transforms frontier AI capabilities into reliable business outcomes. Through intelligent context management, verification loops, and seamless tool integration, Heavy helps organizations deploy AI that completes professional work 100x faster and cheaper than human experts—across 44 knowledge-work occupations.