HY4 Preview API

HY4 Preview is available through the zcloud gateway behind one API key, alongside every other model in the catalog. HY4 Preview API pricing is pay-as-you-go: $0.0417 per 1M input tokens and $0.12505 per 1M output tokens — no subscription, no monthly minimum, and the same OpenAI-compatible endpoint your tools already use.

Against the official API — $0.834 input and $2.501 output per 1M tokens — zcloud runs about 95% cheaper, so sustained workloads cost a fraction of list price. Every request is metered per token and settled in real time, and live rates stay visible on the pricing page. The model provides a 1,000,000 token context window, so long documents, large codebases and extended agent sessions fit in a single request.

For predictable spend, prepaid Token Plans for HY4 Preview start at $1 and are consumed first; PAYG covers anything beyond the plan. HY4 Preview runs behind the same OpenAI-compatible and Anthropic-compatible endpoints as the rest of the catalog, so existing tooling keeps working after a one-line base-URL change — a practical fit for chat products, coding agents and batch jobs that need frontier quality without official-API prices.