DeepSeek V4.1 Flash
DeepSeek V4.1 Flash is a sparse mixture-of-experts model from DeepSeek, and the cost-efficient tier of the V4.1 family.
Specifications
| Lab | DeepSeek |
|---|---|
| Context window | 1M tokens |
| Input price | $0.30/1M |
| Output price | $1.20/1M |
| Release | Sep 2026 |
Strengths
- 1M-token context window for long documents and agent traces
- Sparse MoE design keeps inference cost low at $0.15/$0.60 per million tokens
- Text and image input for coding and technical tasks
Weaknesses
- New release with limited independent benchmark coverage
- OpenRouter pricing varies by time-of-day schedule
Best for
- Long-context coding and repository analysis
- Cost-sensitive agents with large prompts
- Mixed text-and-image technical tasks
In Depth: DeepSeek V4.1 Flash
Summary
DeepSeek V4.1 Flash is an AI model from DeepSeek.
Released in Sep 2026. It takes text and image input and produces text output, with a context window of 1M tokens. Input pricing is $0.30 per 1M tokens and output is $1.20 per 1M tokens on OpenRouter.