Update (October 23, 2026): AIHubMix’s limited-time 30% discount on DeepSeek V4.1 Flash ended on September 27, 2026. The prices, cost example, and comparison below have been updated to current list prices on both platforms.
DeepSeek V4.1 Flash is now available on AIHubMix and OpenRouter. It supports text and image inputs, a 1M-token context window, tool calling, structured outputs, and agent-oriented workflows.
On AIHubMix, the lowest-priced routes list DeepSeek V4.1 Flash at $0.1408 per million input tokens and $0.5632 per million output tokens off-peak. OpenRouter lists the model at $0.165 per million input tokens and $0.66 per million output tokens, with cache reads at $0.006 per million tokens.
DeepSeek V4.1 Flash API pricing at a glance
| Platform / route | Input price | Output price | Cache read |
|---|---|---|---|
| OpenRouter (listed price) | $0.165 / 1M | $0.66 / 1M | $0.006 / 1M |
| AIHubMix — Bytedance off-peak | $0.1408 / 1M | $0.5632 / 1M | $0.0028 / 1M |
| AIHubMix — Bytedance peak | $0.2816 / 1M | $1.1264 / 1M | $0.0056 / 1M |
The Bytedance off-peak hours are 04:00–06:00 and 10:00–01:00 UTC (13:00–15:00 and 19:00–10:00 GMT+9). At peak, 01:00–04:00 and 06:00–10:00 UTC, prices double. The Bytedance route also bills cache storage at $0.0024 per 1M tokens per hour.
What does a typical workload cost?
For a workload using 10 million input tokens and 2 million output tokens, the Bytedance off-peak route on AIHubMix costs about $2.53. The same workload costs about $5.07 at peak. At OpenRouter’s listed price it costs $2.97, or about $3.13 including the 5.5% fee OpenRouter charges on card credit purchases. Off-peak, AIHubMix is about 15% below OpenRouter’s listed price (about 19% with the fee); at peak it costs more.
Does DeepSeek V4.1 Flash support long context?
Yes. DeepSeek V4.1 Flash supports a context window of approximately 1,048,576 tokens. This is useful for large codebases, long technical documents, multi-step research, persistent agent conversations, browser workflows, and large collections of logs or business data.
What makes DeepSeek V4.1 Flash different?
DeepSeek V4.1 Flash is a sparse mixture-of-experts model built on DeepSeek’s Causal Encoder-Decoder architecture. OpenRouter describes a 552B-parameter backbone, with approximately 8B parameters activated for input processing and 16B activated for output generation.
The model also includes native visual understanding. Text and image representations are trained jointly, allowing the model to process images alongside text.
Multimodal input and tool calling
DeepSeek V4.1 Flash accepts text and image input and returns text output. It supports function calling through tools and tool_choice, as well as structured outputs using JSON Schema through response_format.
This makes it suitable for coding agents, terminal agents, browser and computer-use systems, structured data extraction, visual document analysis, automated research, and multi-step business process automation.
AIHubMix vs OpenRouter for DeepSeek V4.1 Flash
AIHubMix
AIHubMix provides an OpenAI-compatible API, a unified model ID, multiple provider routes, time-based peak and off-peak pricing, provider monitoring, automatic retry and fallback, streaming, tool calling, structured outputs, and multimodal input.
OpenRouter
OpenRouter provides the model ID deepseek/deepseek-v4.1-flash, multi-provider routing, provider selection and exclusion, automatic failover, and public provider-level pricing and performance data.
OpenRouter currently lists about 40 provider endpoints for the model, including Relace, Morph, DeepInfra, Sail Research, Wafer, Fireworks, and StreamLake, with input prices from $0.07 to $0.60 per million tokens. Several of the cheapest serve fp4 or fp8 quantized weights.
How to use DeepSeek V4.1 Flash through AIHubMix
AIHubMix provides an OpenAI-compatible endpoint:
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AIHUBMIX_API_KEY"],
base_url="https://aihubmix.com/v1",
)
response = client.chat.completions.create(
model="deepseek-v4.1-flash",
messages=[
{"role": "user", "content": "Analyze this codebase and identify the highest-priority reliability risks."}
],
max_tokens=1024,
stream=False,
)
print(response.choices[0].message.content)
The AIHubMix model ID is deepseek-v4.1-flash. The OpenRouter model ID is deepseek/deepseek-v4.1-flash.
What is DeepSeek V4.1 Flash best used for?
DeepSeek V4.1 Flash is suitable for coding assistants, repository-level code analysis, terminal and computer-use agents, document and chart understanding, image-aware customer support, structured extraction, research agents, multi-step automation, and long-running workflows with repeated tool calls.
Frequently asked questions
Is DeepSeek V4.1 Flash free?
No. It is a paid API model, billed per token at the prices above.
Does it support images and function calling?
Yes. It accepts text and image inputs, supports tools and tool_choice, and can return structured JSON outputs.
Is the AIHubMix discount still running?
No. The 30% promotion ended on September 27, 2026, and the model is now billed at list price. Check the model page for current prices before committing to a long-running workload.
The practical takeaway
DeepSeek V4.1 Flash combines a 1M-token context window, native image understanding, tool calling, structured outputs, and agent-oriented capabilities at a low per-token cost.
For AIHubMix users, use deepseek-v4.1-flash and check the route’s peak and off-peak schedule before estimating costs.
