# Tencent — Hy4 preview > AI lab announcements, news reports and podcasts. forck.live follows what companies announce about their own products. Press may corroborate an official story; it never leads and never appears as an item of its own. A missing date stays missing. A title is the publisher's words — where a company does not publish in English, an English rendering is listed separately as `Title in English` and named as this site's translation, never as theirs. This file is the record of one model version: what the model registry states about it, Tencent's launch post, the first-party posts this record holds about it, the outlets that reported on those posts, and other companies' announcements that it runs on their platforms. A model ranks nothing here and nothing is composed: each date names whose it is, and a field nothing states is `not stated` rather than missing. - This model's page: https://forck.live/models/hy4-preview - Tencent's page: https://forck.live/company/tencent - Every model: https://forck.live/models - Catalogue: https://forck.live/llms.txt ## Model - Name: Hy4 preview - Company: Tencent (tencent.com) - Launch post: Introducing Hy4 preview — https://forck.live/items/4575-introducing-hy4-preview - Announced: 2026-08-27T16:00:00+00:00 - Launch source: https://hunyuan.tencent.com/research/hy4-preview - Launch chosen by: a person, pinned in the model registry - Released (per models.dev): not stated - Listed (per OpenRouter): 2026-08-28 - Open weights: not stated - Posts about it: 2 - Outlets named under its posts: 3 - Also written: Hy4 - OpenRouter id: tencent/hy4-preview — https://openrouter.ai/tencent/hy4-preview - Context window: 1M-token context window — from https://forck.live/items/4575-introducing-hy4-preview - Price: $0.042 per 1M tokens for cached input, $0.834 per 1M tokens for input, $2.501 per 1M tokens for output — from https://forck.live/items/4575-introducing-hy4-preview ## Posts about it _Tencent's own posts whose title names Hy4 preview, and its launch post, in the record's order: dated newest first, undated last. The record reads the newest 50 first-party posts mentioning the model, every company's together, so a model mentioned more often than that lists the newest of them._ Every entry is one first-party announcement, and carries the same eight fields in this order before any others: Company · Announced · Category · Coverage · Announcement · Group · Source · Record `Source` is the company's own page the announcement was traced to and `Record` is this site's page for it. Both are safe to cite. `Coverage` is a number of outlets, or `not counted` — which means this record reached no count of its own, never that nobody wrote about it. `Category` is this tracker's own analysis, and is authoritative wherever it is stated. `not stated` means either that nothing has analysed the post yet or that the analysis placed it outside this taxonomy; neither is a verdict about the announcement. `Announcement` is whether the post is news of something the company did, rather than a how-to, a customer story, a changelog listing or a staffing note. `Group` is which of this record's groups the entry falls in, carried on the entry itself so it holds where the groups are headings and where they are not. One of: `models`, `covered`, `announcements`, `routine`. Anything after `Record` is held detail that only some announcements carry. ### Tencent — Tencent Releases and Open-Sources Tencent Hy4 preview - Company: Tencent (tencent.com) - Announced: 2026-08-28T08:48:45+00:00 - Category: open-weight-release - Coverage: not counted - Announcement: yes - Group: models - Source: https://www.tencent.com/tencent-releases-and-open-sources-tencent-hy4-preview/ - Record: https://forck.live/items/7438-tencent-releases-and-open-sources-tencent-hy4-preview - Subject: Hunyuan Tencent released and open-sourced Hy4 preview, a 770B-parameter large language model with 49B active parameters and a context window exceeding 1M tokens. The model is available through Tencent products and via API, with free access on WorkBuddy and CodeBuddy for two weeks. API pricing is set at USD 0.834 per million input tokens, USD 2.501 per million output tokens, and USD 0.042 per million tokens for cache hits. ### Tencent — Introducing Hy4 preview - Company: Tencent (tencent.com) - Announced: 2026-08-27T16:00:00+00:00 - Category: new-model - Coverage: not counted - Announcement: yes - Group: models - Source: https://hunyuan.tencent.com/research/hy4-preview - Record: https://forck.live/items/4575-introducing-hy4-preview - Subject: Hunyuan Tencent releases Hy4 preview, a 770B-parameter model with 49B active parameters and a 1M-token context window, open-sourced and available on Tencent Cloud and OpenRouter. ## Who reported on it _Outlets this record can name and link, under the first-party post each one covered. Their number is `Outlets named under its posts` above, and the rows are not totalled again. A post's own `Coverage` can be higher: it counts outlets the signal saw that this record cannot name and link._ ### On: Introducing Hy4 preview Record: https://forck.live/items/4575-introducing-hy4-preview - TestingCatalog — Tencent released open-source Hy4 preview model (2026-08-29T12:32:00+00:00): https://www.testingcatalog.com/tencent-released-open-source-hy4-preview-model/ - Pandaily — Tencent Hunyuan Releases Hy4 Preview, Ranking Among the Top Tier of Open-Source Models (2026-08-28T08:07:01+00:00): https://pandaily.com/tencent-hunyuan-hy4-preview-open-source-aug2026 ### On: Tencent Releases and Open-Sources Tencent Hy4 preview Record: https://forck.live/items/7438-tencent-releases-and-open-sources-tencent-hy4-preview - TechNode — Tencent open-sources Hy4 preview with 770B parameters and a 1M-token context (2026-08-28T13:32:49+00:00): https://technode.com/2026/08/28/tencent-open-sources-hy4-preview-with-770b-parameters-and-a-1m-token-context/ --- Record: https://forck.live/models/hy4-preview Catalogue: https://forck.live/llms.txt Current issue: https://forck.live/feed.md