Hy4 previewvsSeed 2.1 Pro
Both language models, compared at each maker’s own API list prices. Every figure links to its source.
Compare at your usage
Every model priced for the same request8,000 tokens in, 2,000 out
| Hy4 preview on Tencent Cloud TokenHub | Seed 2.1 Pro on Volcengine Ark | |
|---|---|---|
| Rate applied | Base rate | Base rate |
| Inputper 1M tokens | ¥6.00 | ¥6.00 |
| Cache readper 1M tokens | ¥0.30 | ¥1.20 |
| Outputper 1M tokens | ¥18.00 | ¥30.00 |
| Cost per request | ¥0.084 | ¥0.108 |
| Per 1,000 requests | ¥84.00 | ¥108.00 |
- Hy4 preview 腾讯云 TokenHub：模型价格 · as of Nov 5, 2026
- Seed 2.1 Pro 火山方舟：模型价格 · as of Nov 2, 2026
Every model is priced for the same request at its maker’s own list prices (each with its source and date), so bold marks the cheapest. A model that can’t serve the request is named, not ranked; a condition its seller doesn’t price says which rate was used.
Cost per request as prompts grow
2K tokens out, list price on each maker’s API.
- Hy4 preview · Tencent Cloud TokenHub
- Seed 2.1 Pro · Volcengine Ark
Key differences
These differences use verified vendor specifications or each maker’s official API on the same region, currency, meter and billing conditions. Different conditions remain side by side in the full table; they do not establish which model is cheaper. Declared features describe support, not measured quality or a recommendation. Missing evidence does not mean a feature is unsupported.
Full comparison
| Hy4 preview Tencent | Seed 2.1 Pro ByteDance Seed | |
|---|---|---|
| Overview | ||
| Released | Aug 28, 2026 | Sep 2026 |
| Open weights | — | |
| Specs | ||
| Context | 1.02M | 1.02M |
| Max input | 960K | Not stated |
| Max output | 64K | 256K |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
| Reasoning | ||
| Reasoning efforts | none, high | low, medium, high, minimal |
| Reasoning can be off | ||
| Tool use | ||
| Structured output | ||
| Pricing · per 1M tokens | ||
| Input price | ¥6.00 | ¥6.00 |
| Output price | ¥18.00 | ¥30.00 |
| Cache read price | ¥0.30 | ¥1.20 |
| Blended price (3 input : 1 output) | ¥9.00 | ¥12.00 |
| Pricing under conditions · per 1M tokens | ||
| Batch input price | ¥3.00Batch | ¥3.00Batch |
| Batch output price | ¥9.00Batch | ¥15.00Batch |
| Flex tier input price | Not offered | ¥3.00Flex tier |
| Flex tier output price | Not offered | ¥15.00Flex tier |
Headline prices may come from different channels, regions or tiers. Check each source before choosing a model; missing facts stay blank.
Model details and sources
- Hy4 preview → Preview
- Seed 2.1 Pro → Available
Cited scores
- LMArena (Arena), leaderboard-dataset on Hugging Face, licensed CC BY 4.0 · LMArena leaderboard dataset (Hugging Face) · CC BY 4.0 · as of Oct 28, 2026