# DeepSeek V4 Flash vs Step 5 Preview - AI Model Comparison

- Page: https://opencode.ai/data/compare/deepseek/deepseek-v4-flash/stepfun/step-5-preview
- Updated: 2026-10-10T07:45:57.000Z

|  | DeepSeek V4 Flash | Step 5 Preview |
| --- | --- | --- |
| Lab | DeepSeek | StepFun |
| Context window | 1M | 1M |
| Max output | 384K | 1M |
| Input modalities | text | text, image, video |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Open weights | Yes | No |
| Release date | 2026-04-24 | 2026-09-16 |
| Input price per 1M tokens | $0.30 | $0.96 |
| Output price per 1M tokens | $1.20 | $2.74 |
| Cached input price per 1M tokens | $0.0060 | $0.05 |
| OpenCode tokens: past 2 months | 168T | 1.9T |
| Share of all tokens | 18% | 0.2% |
| Rank by tokens last week | #5 | #8 |
| Unique users | 3.3M | 24K |
| Weekly retention | 62.5% | - |

Model pages: [DeepSeek V4 Flash](https://opencode.ai/data/deepseek/deepseek-v4-flash.md), [Step 5 Preview](https://opencode.ai/data/stepfun/step-5-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.