Hy4 preview vs Mureka O2: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Hy4 preview and Mureka O2 — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
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.
Mureka O2
Mureka
Mureka O2 is a next-generation music generation model focused on audio-prompted composition, multilingual singing, editing, and rights-aware workflows.
Key features
- Audio-Prompted Generation: Accepts existing audio as a prompt to produce new compositions or variations, enabling users to build on melodies, stems, or recordings.
- Integrated Editing Tools: Provides model-driven editing capabilities that let creators refine generated music and vocal performances without leaving the platform.
- Multilingual Vocal Synthesis: Demonstrated AI singer capable of producing vocals in multiple languages, enabling localization and cross-market releases.
- Style Versatility: Produces music in varied styles (examples include classic and funk) allowing rapid experimentation across genres.
- Rights-Aware Workflow: Built to work within a platform that includes copyright trading and rights management, aiming to simplify licensing and monetization.
- Model Family Updates: Released alongside other versions (e.g., V7.6) under a 'Smarter Ears' initiative, indicating iterative improvements in audio understanding and quality.
- Generative music and vocal synthesis tuned for multiple musical styles (demonstrated Classic and Funk demos)
- Audio-prompted generation workflow (accepts audio examples/prompts to guide generation)
- Multilingual vocal capability (demonstrated 10-language single by Mureka singer)
- Integration with Mureka online audio editor for trimming, mixing and post-generation edits
- Part of 'Smarter Ears' model family designed to address global music business needs
- Designed to feed into Mureka's copyright-trading and rights-management features
- Web-based demos and example content (YouTube channel and platform galleries)
Best for
- Songwriting and Idea Development: Seed a new song by uploading a melody or beat and using Mureka O2 to generate full arrangements and vocal lines.
- Multilingual Single Releases: Produce localized vocal versions of a track in multiple languages using the platform’s multilingual singing capabilities.
- Style Exploration and Demos: Quickly generate stylistic variations (e.g., classic, funk) to evaluate direction and present options to collaborators or labels.
- Rapid Prototyping for Media: Create music beds, themes, or vocal hooks for ads, games, or films where fast iteration is required.
- Rights Management and Monetization: Package generated works with built-in copyright-tracking workflows to prepare assets for licensing or marketplace listing.
- Creative Collaboration: Use audio prompts from collaborators to generate variations and iterate on compositions without manual re-recording.
- Rapid prototyping of song ideas and style-specific musical demos
- Generating multilingual vocal tracks for international releases
- Creating backing tracks or stems for production and editing in the Mureka editor
- Producing demo content and marketing assets (e.g., music videos, platform showcases)
- Preparing generated works for copyright listing/trading within Mureka's marketplace