SIDE BY SIDE
DeepSeek V4.1 Flash vs DeepSeek V4.1 Flash 1017
Both are DeepSeek models. DeepSeek V4.1 Flash 1017 was added to OpenRouter on 2026-10-17, DeepSeek V4.1 Flash on 2026-09-10.
| Field | DeepSeek V4.1 Flash | DeepSeek V4.1 Flash 1017 |
|---|---|---|
| Provider | DeepSeek | DeepSeek |
| Family | DeepSeek | DeepSeek |
| Province | Snow Country | Snow Country |
| Context window | 1.05M tokens | 1.05M tokens |
| Maximum output | 944K tokens | 393K tokens |
| Input / 1M tokens | $0.020 | $0.150 |
| Output / 1M tokens | $1.00 | $0.600 |
| Accepts | text, images | text, images |
| Produces | text | text |
| Reasoning | Yes | Yes |
| Tool use | Yes | Yes |
| Added to OpenRouter | 2026-09-10 | 2026-10-17 |
| Model ID | deepseek/deepseek-v4.1-flash | deepseek/deepseek-v4.1-flash-1017 |
Questions and answers
Which is cheaper, DeepSeek V4.1 Flash or DeepSeek V4.1 Flash 1017?
It depends on the mix: DeepSeek V4.1 Flash is cheaper for input ($0.020 vs $0.150), DeepSeek V4.1 Flash 1017 for output ($0.600 vs $1.00) per million tokens. At three input tokens per output token, DeepSeek V4.1 Flash 1017 costs less. On input, DeepSeek V4.1 Flash is 87% cheaper.
Which has the larger context window?
Both have a 1.05M-token context window.
What can one do that the other cannot?
Nothing among reasoning, tool use and image input: both support reasoning, tool use and image input.
Answers are computed from the 2026-10-24 catalog snapshot.
See DeepSeek V4.1 Flash in 3DSee DeepSeek V4.1 Flash 1017 in 3D