Hy4 preview vs Ollama: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Hy4 preview and Ollama — 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.
Ollama
Ollama
A local-first runtime and tooling to run, manage, and integrate large language models on personal or self-hosted infrastructure.
Key features
- Local Model Runtime: Run and host large language models on a developer's machine or private server, enabling low-latency inference and data privacy compared with cloud-only offerings.
- API & CLI Management: Simple programmatic API and command-line tooling to create, start, stop, list, and manage models and chat sessions, streamlining development and deployment workflows.
- Model Library & Publishing: Includes a catalog of pre-built models and supports creating models via Modelfile and pushing/publishing models with namespace support for sharing or distribution.
- Web Search Augmentation: Built-in web search API to augment model context with up-to-date web results, reducing hallucinations and improving factual accuracy for time-sensitive queries.
- Cross-Platform Desktop App: Official desktop client (Windows/macOS/Linux) that connects to a local or remote Ollama server to provide a chat UI, message layout optimizations, and faster chat switching.
- SDKs & Community Integrations: Ecosystem libraries and community clients (examples in Elixir, .NET, Flutter) that simplify integration into applications and enable language-specific developer experiences.
- Performance Optimizations: Support for performance features like flash attention and BPE encoding improvements to accelerate inference and improve handling of tokenization edge cases.
- Local model runtime for running large language models on-device or on private servers
- HTTP/REST API for inference, model info and management operations
- Command-line interface (ollama CLI) for creating, running and pushing models
- Support for GPU-accelerated inference (GPU docs available)
- Library of pre-built community models and ability to create/push custom models
- Client SDKs and community libraries (examples: .NET, Elixir, R, Python/JS)
- Desktop/mobile frontends that connect to an Ollama API endpoint (Flutter app available)
- Local-first privacy and on-prem deployment; optional model hosting via Ollama account/registry
- Portable Linux executable for desktop app; standard desktop data locations
Best for
- Privacy-preserving chatbots: Deploy conversational agents that run fully on a user's machine or on private infrastructure to keep data local and reduce exposure to third-party cloud providers.
- Application integration: Integrate Ollama as an inference backend for web, mobile, or desktop apps using available SDKs (e.g., .NET, Elixir) to serve completions, summaries, or assistants.
- Custom model development and distribution: Create models with Modelfile, test locally, and push to a namespace to share or deploy across machines or teams.
- Augmented research and knowledge assistants: Use the web search augmentation to provide up-to-date information in assistants, reducing hallucinations for queries requiring recent facts.
- Embedded chat UIs and clients: Connect the Ollama desktop or community chat UIs to a local server for a fast, offline-capable chat experience integrated into product workflows.
- Multi-model experimentation: Run and orchestrate interactions between different models (e.g., conversational pipelines or model-vs-model experiments) for research and prototype scenarios.
- Embedding a local LLM backend for chat UIs and chatbots (desktop, web, mobile)
- Summarization extensions and browser sidebar summarizers (e.g., SpaceLlama)
- Video/text summarization services (e.g., YouTube summarizer integrations)
- Research and development with private or offline LLM inference
- Multi-model experiments (e.g., dual-model conversations)
- Integrating LLMs into enterprise on-premise systems requiring data locality