Cohere vs Hy4 preview: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Cohere and Hy4 preview — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
Cohere
Cohere
Enterprise-grade language models, SDKs, and tooling for building private, secure, and customizable NLP applications and RAG systems.
Key features
- Multi-language SDKs: Official SDKs and client libraries for Python, TypeScript, Java, and Go enabling easy integration of Cohere endpoints into existing applications and workflows.
- Prebuilt RAG Components: Cohere Toolkit includes ready-made connectors and components for retrieval-augmented generation (RAG) pipelines, standardizing document formats and accelerating grounded chatbot construction.
- Streaming Chat & Generate Endpoints: Support for streaming responses in chat and generation APIs to enable low-latency interactive user experiences and progressive output consumption.
- Embeddings & Semantic Search: Managed embeddings service for creating vector representations of text used for semantic search, similarity matching, and retrieval to back RAG systems.
- Enterprise Controls & Privacy: Features and positioning focused on private, secure, and customizable deployments suitable for enterprise governance, data protection, and internal-use cases.
- Developer Experience & Examples: Extensive docs, code snippets, Jupyter notebooks, and sample connectors (quick-start connectors repo) to speed prototyping and production adoption across cloud providers.
- Cross-cloud Deployment Support: Guidance and tooling to use Cohere models on external cloud platforms (AWS, Azure, OCI) or Cohere-hosted environments to meet enterprise infrastructure requirements.
- Model Tooling & Parsing: Tools and SDKs (e.g., Compass and parsing helpers in repos) to assist in model parsing, structured output extraction, and integration into downstream systems.
- HTTP/REST API with published OpenAPI spec (cohere-openapi.yaml)
- Official SDKs: Python, TypeScript, Java, Go (golang) and community/unofficial SDKs (e.g., Ruby gem)
- Cohere Toolkit: prebuilt components for building and deploying RAG applications
- Chat and generate endpoints with named models (example model: command-a-03-2025)
- Streaming support for chat via chatStream / streaming endpoints
- Client libraries expose error classes (CohereError, CohereTimeoutError) and typed clients (e.g., CohereClientV2)
- Developer resources: code snippets, Jupyter notebooks, sample apps and GitHub repos
- Supports usage on external cloud providers (AWS, Azure, OCI) as well as Cohere platform
- Open-source examples and SDKs hosted on GitHub (cohere-ai organization)
Best for
- Knowledge-centered Chatbots: Build internal or customer-facing chat assistants that use connector-fed documents and embeddings to provide accurate, grounded answers using RAG.
- Semantic Search & Discovery: Index and embed large corpora (documents, FAQs, product content) to enable semantic search and relevance-ranked retrieval across enterprise data.
- Document Summarization & Insight Extraction: Summarize long-form documents, extract structured insights (entities, actions, highlights) to streamline reporting and decision workflows.
- Automating Internal Workflows: Generate draft emails, policy summaries, or triage support tickets by integrating generation endpoints into business process automation tools.
- Developer Rapid Prototyping: Use SDKs, sample notebooks, and the developer-experience repository to prototype and validate language features quickly before productionizing.
- Custom Private Deployments: Deploy tailored models and configurations with enterprise privacy and security considerations for sensitive internal data and regulated industries.
- Build conversational agents and chatbots using chat and streaming endpoints
- Implement Retrieval-Augmented Generation (RAG) workflows with Cohere Toolkit components
- Automate enterprise workflows and document understanding to turn fragmented data into insights
- Prototype and deploy LLM-powered features across multi-cloud environments (AWS, Azure, OCI)
- Integrate model inference into backend services using official SDKs (Python, TypeScript, Java, Go)
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.