Tencent Hy4 preview is an open-source 770B text model for coding and research. Kompozy is the content engine that turns text into published posts.
If you searched "Tencent Hy4 preview alternative," start with what Hy4 actually is, because it's a genuinely capable release and this page won't pretend otherwise. Hy4 preview is Tencent Hunyuan's open-source mixture-of-experts model — 770 billion total parameters, about 49 billion active, and a context window over 1 million tokens — released on August 28, 2026 and tuned for coding, agentic engineering, analysis, and research. Open weights, cheap API access, and a huge context window make it a strong pick for what it's built to do.
I run Kompozy, and the honest framing is that Kompozy is not a large language model and doesn't try to be one — it doesn't reason over a codebase, run as an agent, or publish open weights. So most people typing "Hy4 preview alternative" split into two groups. The first genuinely needs a reasoning model for code, agentic tasks, or long-context analysis, in which case Hy4 (or a peer like DeepSeek V4 Pro or GLM-5.3) is the right answer and you may not need an alternative at all. The second group wanted finished content and discovered that Hy4 hands back raw text — no video, no carousel, no captions, no schedule, no post.
That second group is who this page is for. Hy4 answers "how do I draft or analyze this?" Kompozy answers "how do I turn it into published, on-brand content everywhere?" They're different questions, and only the second one describes a content operation. Below is where each fits — including the cases where Hy4, not Kompozy, is clearly the tool you want.
Hy4 preview is a text-in, text-out large language model from Tencent's Hunyuan team, open-sourced on August 28, 2026. It uses a mixture-of-experts architecture (770B total parameters, ~49B active) with a context window exceeding 1 million tokens, and it targets software engineering, office and financial analysis, game development, and scientific research. Tencent published the weights (plus a lower-precision FP8 variant) on Hugging Face, ModelScope, GitCode, and CNB, and offers API access via Tencent Cloud TokenHub and OpenRouter at roughly $0.834 per million input tokens and $2.501 per million output tokens. What it produces is text and code — it generates no images, video, or audio, applies no brand voice, and does not schedule or publish anything.
You'd look past Hy4 the moment your goal shifts from "draft or analyze this" to "publish content." A raw model output is a wall of text with no hook, no captions for muted autoplay, no vertical crop, no visual format, and no path to a feed — and Hy4 is tuned for engineering, so its English short-form voice is unproven and its drafts read like model output. Turning any of it into content means bolting on a caption tool, a clipper, a carousel and image designer, a brand-voice layer, and a scheduler. There are practical caveats too: the strongest benchmarks are Tencent's own and await independent verification, and self-hosting a 770B model for privacy takes serious GPU hardware. Kompozy is the alternative when you want that entire downstream — finished, captioned, on-brand content across formats and platforms — handled in one place, without assembling a stack around a text model.
| Feature | Tencent Hy4 preview | Kompozy | Note |
|---|---|---|---|
| Coding & agentic engineering | Yes | No | Hy4's core purpose; Kompozy is not a coding or agent model. |
| Long-context reasoning (1M tokens) | Yes | No | Hy4 ingests whole codebases and transcripts; Kompozy is a generate-and-publish engine, not a raw model. |
| Open weights / self-hostable | Yes | No | Hy4 publishes weights (plus FP8) for self-hosting; Kompozy is a hosted product. |
| Persona / avatar explainer video | No | Yes | Kompozy makes HeyGen/Persona talking-head video; Hy4 outputs text only. |
| Carousels, images, quote graphics | No | Yes | Kompozy generates brand-exact carousels via HyperFrames plus images and quote cards; Hy4 makes none. |
| Blog & newsletter generation | Partial (raw text) | Yes | Hy4 can draft prose; Kompozy produces finished, voice-governed Blog Articles and Email Newsletters. |
| Feed-styled captions & clipping | No | Yes | Kompozy burns branded captions and cuts vertical shorts; Hy4 has no media output. |
| Brand voice governance | No | Yes | A Persona Brief and banned-word filters govern every Kompozy output; raw model text has no voice layer. |
| Scheduling & multi-platform publishing | No | Yes | Kompozy schedules and publishes across the whole surface; Hy4 publishes nothing. |
| Cheap, high-volume raw text | Yes | No | Hy4's low per-token pricing is a real advantage for bulk drafting; Kompozy is priced by finished output. |
| Tier | Tencent Hy4 preview plan | Tencent Hy4 preview price | Kompozy plan | Kompozy price |
|---|---|---|---|---|
| Entry | Hy4 preview API | ~$0.834/M input, $2.501/M output (limited free window at launch) | Kompozy Starter | $99/mo (5,500 credits) |
| Mid | Hy4 preview (self-hosted weights) | Free weights + GPU compute | Kompozy Pro | $299/mo (18,000 credits) |
| Top | Hy4 preview (bulk API) | Scales per token | Kompozy Enterprise | Custom (sales-led) |
Here's the clean way to see the choice. Hy4 preview is a reasoning model; Kompozy is a content engine. If you specifically need to code, run an agent, or analyze a million tokens of source, use Hy4 — Kompozy won't do that, and this page won't pretend it does. The two aren't mutually exclusive: a smart workflow uses Hy4 (or any model) to draft and analyze at the front, then hands the text to Kompozy to become content.
Because the moment the draft exists, the real work is the rest of the recipe — a face on the idea, a format that stops the scroll, one consistent voice, and reliable distribution. Kompozy is built to be that recipe: from a prompt or a source it generates across 18 formats — Persona and HeyGen avatar video, Clipped Shorts, Carousels via HyperFrames, Photo Posts, Quote Graphics, Blog Articles, Email Newsletters, and Text Posts — every piece held to your Persona Brief, then reframed per platform and scheduled and published across eight social platforms plus blog and email through Autopilot and a review pipeline. Keep Hy4 for the reasoning if you love it, and let Kompozy make and ship everything around it — no model wrangling required.
Only for part of the job. Hy4 is a coding and reasoning LLM that outputs raw text; Kompozy doesn't reason over code or publish weights. Kompozy is the alternative when your goal is finished, published content — captioned video, carousels, a blog, a newsletter — generated in one brand voice and distributed across platforms, rather than a wall of model text.
For turning ideas or drafts into published multi-format content, Kompozy is the practical pick: it generates 18 formats — persona/avatar video, carousels, images, quote graphics, blogs, and newsletters — in one brand voice and publishes to eight social platforms plus blog and email with scheduling and autopilot. If you need another reasoning model instead, DeepSeek V4 Pro, GLM-5.3, or Kimi K3 are peers.
Yes, and it's the strongest setup. Use Hy4's long context to draft or summarize a dense source, then drop that text into Kompozy as a source. Kompozy rewrites it under your Persona Brief, fans it into video, carousels, images, a blog, and a newsletter, and schedules the batch across platforms.
Hy4 API access was listed around $0.834 per million input tokens and $2.501 per million output tokens (with open weights you can self-host for compute cost), while Kompozy is credit-based from $99/mo (5,500 credits). They meter different things — raw text versus generated-and-published content — so compare by the outcome you need, not the sticker.
No. Hy4 is a text-only model with no publishing capability. Kompozy publishes to eight social platforms — Instagram, Facebook, TikTok, YouTube, LinkedIn, X, Pinterest, and Threads — plus blog and email, with scheduling, a per-post review, and autopilot.