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DeepSeek V4.1 Flash

Chat-30%
deepseek/deepseek-v4.1-flash
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DeepSeek V4.1 Flash is DeepSeek's efficiency-focused Mixture-of-Experts model with native vision understanding. It supports reasoning enabled by default, tool calls, JSON output, and prompt caching. Context window: 1M tokens, output: up to 384K. Its upstream model ID is deepseek-flash. Available through Ofox via OpenAI and Anthropic protocols.

Context Window
1M
Max Output Tokens
384K
Released
2026-09-10
Capabilities
VisionFunction CallingReasoningPrompt Caching
Available Providers
DeepSeekVolcengine
Supported Protocols
openaianthropic

Providers

DeepSeekprovider.type: "deepseek"
-30%
Input Tokens
$0.21/M
$0.3/M
Output Tokens
$0.84/M
$1.2/M
Cache Read
$0.0042/M
$0.006/M
Protocols
openai/v1/chat/completions/v1/responses
anthropic
Volcengineprovider.type: "volcengine"
-30%
Input Tokens
$0.21/M
$0.3/M
Output Tokens
$0.84/M
$1.2/M
Cache Read
$0.0042/M
$0.006/M
Protocols
openai/v1/chat/completions/v1/responses
anthropic

Playground

Open in OfoxChat

Code Examples

from openai import OpenAI


client = OpenAI(
    base_url="https://api.ofox.run/v1",
    api_key="YOUR_OFOX_API_KEY",
)


response = client.chat.completions.create(
    model="deepseek/deepseek-v4.1-flash",
    messages=[
        {"role": "user", "content": "Hello!"}
    ],
)


print(response.choices[0].message.content)

Related Models

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DeepSeek V4 Flash 0731
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DeepSeek V4 Flash 0423
$0.19/M/$0.51/M

Similar Models

OpenAI: GPT-6.1 Sol
$2/M/$10/M
Anthropic: Claude Sonnet 5.5
$2/M/$10/M
Anthropic: Claude Opus 5.5
$4/M/$20/M

Frequently Asked Questions

DeepSeek V4.1 Flash on Ofox.ai costs $0.3/M per million input tokens and $1.2/M per million output tokens. Pay-as-you-go, no monthly fees.