ChatGPT vs Hy4 preview: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of ChatGPT and Hy4 preview — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
ChatGPT
OpenAI
A conversational, multimodal assistant by OpenAI for answering, drafting, researching, generating and acting on complex tasks.
Key features
- Conversational Dialogue: Supports multi-turn conversations that can answer follow-up questions, admit mistakes, and refine outputs based on user feedback, enabling iterative task completion and clarification.
- Multimodal Input and Image Editing: Accepts image uploads for interpretation, extraction, and question-answering about visuals and can generate or modify images and mockups from natural-language prompts.
- Web Search and Live Information: Built-in browsing (ChatGPT Search) to look up recent or real-time internet information, cite sources, and support questions about current events or unfamiliar topics.
- Agentic Workflows: ChatGPT Agent can navigate websites, securely prompt for logins when needed, run code, filter results, and produce end-to-end deliverables (editable slides, spreadsheets, reports) based on complex instructions.
- Deep Research & Synthesis: Designed to read and synthesize content across multiple online sources to produce structured, cited outputs suitable for literature reviews, strategy reports, and long-form research tasks.
- Transcription and Meeting Capture (Record): Capture audio (meetings, brainstorms, voice notes) and automatically transcribe, summarize, and convert recordings into actionable outputs like follow-ups, plans, or code (available on select plans/apps).
- Interactive Learning (Study Mode): Guided learning mode that asks diagnostic questions, tailors explanations by skill level, and uses Socratic-style interaction to progressively build understanding of topics.
- Code Execution and Analysis: Ability to run code and perform analyses as part of agent workflows, enabling tasks like data analysis, prototype generation, and automated testing integrated into conversational sessions.
- Multi-turn conversational interface with follow-up, clarification, and correction handling
- Fine-tuned from GPT-3.5 series using RLHF for instruction-following behavior
- Multimodal input/output: image analysis, image generation and editing, and audio transcription/summarization (Record mode)
- Web browsing / ChatGPT Search for recent and source-backed information
- Deep research capabilities: reading and synthesizing across sources with cited outputs
- Agentic system (ChatGPT Agent) with ability to interact with websites, run code, and carry out iterative multi-step workflows using a virtual execution environment
- Model switching and expanded model support (GPT-3.5, GPT-4, GPT-5 as rolled out in product)
- Available on web, iOS, Android, macOS, Windows (desktop apps) and via OpenAI model APIs and plugin/extension ecosystems
- Privacy and safety mitigations implemented through iterative deployment and RLHF
Best for
- Content Drafting and Editing: Quickly draft blog posts, marketing copy, emails, and rewrite or summarize text with style and length control for faster content production.
- Deep Multi-Source Research: Perform literature reviews or strategic research by synthesizing information from multiple web sources, producing cited summaries, annotated bibliographies, and structured reports.
- Automated Competitive Analysis and Deliverables: Instruct ChatGPT to gather competitor information, analyze findings, and generate editable slide decks or spreadsheets summarizing strengths, weaknesses, and recommendations.
- Task Automation and Planning: Use agent capabilities to plan and execute real-world tasks (for example, plan a meal, buy ingredients online, and create shopping lists) by navigating sites and producing checklists.
- Meeting Transcription and Action Items: Record meetings or voice notes, automatically transcribe and summarize them, and produce follow-ups, action items, or task lists for participants.
- Coding Assistance and Prototyping: Generate, debug, and refactor code; run snippets for analysis; and produce working prototypes or implementation plans integrated into the conversational workflow.
- Tutoring and Study Support: Use Study Mode to teach complex topics interactively, provide stepwise explanations, quizzes, and progressively harder problems tailored to the learner’s level.
- Answering questions, explaining concepts, and tutoring
- Drafting, rewriting, and summarizing content (emails, reports, articles)
- Code generation, debugging, and providing programming help
- Analyzing and extracting information from images, charts, and diagrams
- Conducting deep research and producing cited literature reviews or briefs
- Automating workflows: scheduling, website interaction, data extraction, and report generation via agents
- Transcribing and summarizing meetings or voice notes (Record mode)
- Creating and editing images or mockups from natural-language prompts
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.