hy4

This page lists parameters from the ModelFold model catalog.

The official release of Hy4 delivers comprehensive and substantial improvements over Hy4 Preview, with particularly strong gains in agentic capabilities and performance across a wide range of long-horizon, real-world productivity...

Overview

Field	Value
Model ID	hy4
Family slug	hy4
Modality	Chat Models (chat)
Endpoint	POST /v1/chat/completions

Request example

export API_BASE="https://modelfold.ai/v1"
export MODELFOLD_API_KEY="mf-..."   # 在控制台 API Key 页面创建
curl -X POST "$API_BASE/chat/completions" \
  -H "Authorization: Bearer $MODELFOLD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"hy4","messages":[{"role":"user","content":"Explain what a diffusion model does in two sentences."}],"max_tokens":512}'

Related models

• Model overview
• See all 97 chat models models
• beam-1-0-501b-a23b
• claude-fable-5
• claude-fable-5-1
• claude-fable-5-2
• claude-haiku-4-5
• claude-haiku-5-5

See also

• API reference