DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek V4.1 Flash, served upstream by DeepSeek under the deepseek-flash API model name. It pins a fixed checkpoint for teams that need reproducible behaviour, while the deepseek/deepseek-v4.1-flash alias continues to track the latest rollout; capabilities and pricing match the base model. Like the base, V4.1 Flash is a sparse mixture-of-experts model with native multimodal visual understanding: it accepts text and images and returns text, serves a 1M-token context window with up to 384K output tokens, and supports thinking (with selectable reasoning effort) and non-thinking modes, JSON and structured output, and tool calls across the Chat Completions, Responses and Anthropic-compatible APIs. Pin this snapshot when a workflow must not shift under a silent model update; use the deepseek/deepseek-v4.1-flash alias when you want the latest improvements automatically.
It is the dated October 17, 2026 snapshot of DeepSeek V4.1 Flash, served upstream as deepseek-flash. It pins a fixed checkpoint for reproducible behaviour, while the deepseek/deepseek-v4.1-flash…
A sparse mixture-of-experts model with native multimodal visual understanding: text and images in, text out. 1M-token context window, up to 384K output tokens. Thinking and non-thinking modes with selectable reasoning effort, JSON and structured output, and tool calls with parallel tool calls.
Same pricing as the base DeepSeek V4.1 Flash, with DeepSeek's peak / off-peak schedule. See the pricing on this page for the current rate.
Call it with model deepseek/deepseek-v4.1-flash-1017 through your OrcaRouter API key over the Chat Completions, Responses, or Anthropic-compatible APIs — any OpenAI or Anthropic SDK works by setting the base URL to OrcaRouter. Supports tools / function calling, response_format for structured outputs, and selectable reasoning effort.
OpenAI-compatible — keep the SDK you already use
https://api.orcarouter.ai/v1import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.orcarouter.ai/v1",
api_key=os.environ["ORCAROUTER_API_KEY"],
)
response = client.chat.completions.create(
model="deepseek/deepseek-v4.1-flash-1017",
messages=[{"role": "user", "content": "Hello"}],
)
print(response.choices[0].message.content)frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_completion_tokensmax_tokensmin_pparallel_tool_callspresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p| Input / 1M tokens · Off-peak | $0.150 |
|---|---|
| Output / 1M tokens · Off-peak | $0.600 |
| Cache read / 1M · Off-peak | $0.0030 |
| Peak hours | 01:00–04:00, 06:00–10:00 ×2 (UTC) |
| Input / 1M tokens · ×2 | $0.300 |
| Output / 1M tokens · ×2 | $1.20 |
| Cache read / 1M · ×2 | $0.0060 |
| Currency | USD |
Estimate based on list price
Estimate only — actual token counts depend on the provider's tokenizer.
What developers are saying this week
GET /api/public/models/deepseek/deepseek-v4.1-flash-1017Open @misc{orcarouter_deepseek_v4_1_flash_1017,
title = {DeepSeek V4.1 Flash 1017 API},
author = {DeepSeek},
year = {2026},
howpublished = {OrcaRouter},
url = {https://www.orcarouter.ai/models/deepseek/deepseek-v4.1-flash-1017}
}DeepSeek. (2026). DeepSeek V4.1 Flash 1017 API. OrcaRouter. https://www.orcarouter.ai/models/deepseek/deepseek-v4.1-flash-1017