# DeepSeek V4 Flash vs Hy4 preview - AI Model Comparison

- Page: https://opencode.ai/data/compare/deepseek/deepseek-v4-flash/tencent/hy4-preview
- Updated: 2026-11-05T09:10:24.000Z

|  | DeepSeek V4 Flash | Hy4 preview |
| --- | --- | --- |
| Lab | DeepSeek | Tencent |
| Context window | 1M | 1M |
| Max output | 384K | 64K |
| Input modalities | text | text |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Open weights | Yes | Yes |
| Release date | 2026-04-24 | 2026-08-28 |
| Input price per 1M tokens | $0.22 | $0.83 |
| Output price per 1M tokens | $0.66 | $2.50 |
| Cached input price per 1M tokens | $0.0070 | $0.04 |
| OpenCode tokens: past 2 months | 55T | 170B |
| Share of all tokens | 4.1% | 0.0% |
| Rank by tokens last week | #41 | #37 |
| Unique users | 1.2M | 47K |
| Weekly retention | 60.3% | 48.5% |

Model pages: [DeepSeek V4 Flash](https://opencode.ai/data/deepseek/deepseek-v4-flash.md), [Hy4 preview](https://opencode.ai/data/tencent/hy4-preview.md)

## Methodology

- Updates: Aggregated every hour. Days and weeks use UTC.
- Tokens: Input, output, reasoning, and cached tokens for each request.
- Users and sessions: Approximate counts of distinct users and OpenCode sessions.
- Cost: Session cost is the average cost per OpenCode session. Token prices are list prices from the OpenCode model catalog.
- Retention: The share of a model's users in one week who use it again the next week.
- Citation: Cite OpenCode Data (opencode.ai/data) with the update time shown at the top of the page.