Claude Code vs Hy4 preview: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Claude Code and Hy4 preview — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
Claude Code
Anthropic
A command-line agent that embeds Claude in your terminal or IDE to map, edit, and manage million-line codebases and automate PR workflows.
Key features
- Agentic Codebase Mapping: Automatically discovers and maps project structure, dependencies, and relevant files across million-line repositories using agentic search, enabling rapid understanding without manual file selection.
- Terminal and IDE Integration: Embeds Claude directly in terminals and popular IDEs (VS Code, JetBrains), giving the assistant access to full repository context so suggestions and edits are applied directly in code files.
- End-to-End Workflow Automation: Reads issues, writes code, runs tests, and submits pull requests by connecting to GitHub/GitLab and local CLI tools—letting developers delegate complete tasks from discovery to PR creation.
- Model Context Protocol (MCP) & Plugins: Supports MCP and third-party plugins (e.g., semantic code search backends) to provide efficient, scalable context retrieval from vector stores and other sources for large codebases.
- Extensible SDK and Agent Harness: Provides Headless, TypeScript, and Python SDKs with built-in tools (file ops, code execution, web search), session management, error handling, and monitoring to build production-ready agents.
- Hooks and Guardrails: Configurable hooks let teams intercept proposed file changes or system commands to require approvals, enforce policies, log activity, or modify actions before execution.
- Advanced Permissions and Monitoring: Fine-grained controls over agent capabilities and production essentials such as prompt caching, performance optimizations, session tracing, and auditing for enterprise deployment.
- CLI-based coding assistant for terminals and headless workflows
- IDE plugins for VS Code, JetBrains, and community Emacs integrations
- Agent system with subagents for specialized roles and workflows
- Model Context Protocol (MCP) support for extensible context providers and plugins
- Hooks system to intercept, validate, modify, or block autonomous actions
- Automatic project context gathering (CLAUDE.md support) and agentic search to map codebases
- SDKs in TypeScript and Python plus headless mode for automation
- Integrations with GitHub/GitLab for reading issues, creating PRs, and CI workflows
- File operations, code execution, test running, and error handling built-in
- Support for semantic code search via MCP plugins and vector DB indexing
Best for
- Rapid Codebase Onboarding: New team members or cross-functional collaborators use Claude Code to instantly map and explain project structure, dependencies, and common patterns to reduce ramp-up time.
- Automated Bug Fixing and Testing: Developers delegate triage, create fixes, run tests, and generate pull requests from the terminal to accelerate routine maintenance and reduce context switching.
- Large-Scale Refactors and Feature Implementation: Use Claude Code’s deep repository understanding and subagents to plan and execute coordinated refactors or add multi-file features with fewer manual edits.
- Semantic Code Search and Context Augmentation: Integrate MCP plugins (vector stores) to provide targeted semantic search results as context, reducing token usage and surfacing the most relevant code for complex queries.
- Policy-Enforced Automation: Organizations implement hooks and permission policies to allow autonomous edits only after review or to block risky operations, enabling safe automation in production workflows.
- Prototyping and Cross-Discipline Collaboration: Product managers, QA, and non-ML engineers can prototype features or generate documentation with Claude Code assisting as a thought partner and implementation aide.
- Rapid feature prototyping and implementation from natural-language prompts
- Large-scale codebase navigation, comprehension, and refactoring
- Automated bug diagnosis, fix generation, and test execution
- Generating and submitting PRs or patches from the terminal
- Creating specialized agent assistants (e.g., legal review, finance reports) within a code workflow
- Enriching model context using semantic code search and vector-indexed repositories
- Embedding safety and compliance through custom hooks and permissioning
Hy4 preview
Tencent
Tencent's open-weight Hy4 preview, a 770B-parameter Mixture-of-Experts model with 49B active parameters and a 1M-token context window.
Key features
- 770B Mixture-of-Experts Architecture: Holds 770 billion total parameters while activating only 49 billion per token, so capacity scales without proportional inference cost.
- 1M-Token Context Window: Accepts inputs exceeding one million tokens, allowing whole codebases, long document sets or extended agent traces in a single prompt.
- Apache 2.0 Open Weights: Released under a permissive licence that allows commercial use, modification and redistribution with no separate agreement.
- Productivity Task Focus: Tuned for real-world coding, office work and scientific research rather than narrow benchmark optimisation.
- Multi-Product Availability: Accessible globally through Tencent's WorkBuddy, CodeBuddy, Yuanbao and ima applications in addition to the raw weights.
- API Access via TokenHub and OpenRouter: Can be called through Tencent Cloud TokenHub or OpenRouter for teams that prefer hosted inference over self-hosting.
Best for
- Whole-Repository Code Work: Load an entire codebase into the million-token context to reason about refactors and cross-file dependencies at once.
- Long-Horizon Agent Tasks: Drive multi-step agent workflows where the full history of tool calls and intermediate results must stay in context.
- Self-Hosted Deployment: Run a frontier-scale open-weight model on private infrastructure where data cannot leave the organisation.
- Scientific Literature Analysis: Ingest large collections of papers or experimental logs and synthesise findings without chunking the input.
- Office Document Processing: Summarise, draft and restructure long reports, contracts and spreadsheets in enterprise workflows.
- Commercial Fine-Tuning: Adapt the weights for a proprietary product under the Apache 2.0 licence without negotiating a model licence.