# Jamba Large vs Hy4 preview - AI Model Comparison

- Page: https://opencode.ai/data/compare/ai21/jamba-large/tencent/hy4-preview
- Updated: 2026-10-02T10:37:25.000Z

|  | Jamba Large | Hy4 preview |
| --- | --- | --- |
| Lab | AI21 | Tencent |
| Context window | 256K | 1M |
| Max output | 4.1K | 64K |
| Input modalities | text | text |
| Reasoning | No | Yes |
| Tool calling | Yes | Yes |
| Open weights | Yes | Yes |
| Release date | 2025-07-01 | 2026-08-28 |
| Input price per 1M tokens | $2.00 | $0.96 |
| Output price per 1M tokens | $8.00 | $2.88 |
| Cached input price per 1M tokens | - | $0.05 |
| OpenCode tokens: past 2 months | - | 320B |
| Share of all tokens | - | 0.0% |
| Rank by tokens last week | - | #32 |
| Unique users | - | 39K |
| Weekly retention | - | 54.9% |

Model pages: [Jamba Large](https://opencode.ai/data/ai21/jamba-large.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.