AELDER
DeepSeekModel API

DeepSeek V4.1 Flash API

Pay 91% less.

On input and output tokens, compared with official prices.

OpenAI-compatible · Pay as you go

MODEL IDdeepseek-v4.1-flash
One key. No subscription.
01 / OVERVIEW

DeepSeek V4.1 Flash
overview.

DeepSeek V4.1 Flash is an open-weight reasoning model with visual understanding. This entry is the 1017 release from 17 October 2026, rather than the earlier September version. It is distinct from DeepSeek V4 Pro: compare their published input capabilities, evaluation results and current token rates before choosing between the two.

Published model specifications

Context window1M tokens
ReasoningSupported
Inputtext & image
Outputtext
AA Intelligence Index45 / v4.3.2
Catalog release17 Oct 2026
Source: Artificial Analysis ↗
OPTIONAL / CONNECTIONAPI request example

Set the model ID and base URL in your OpenAI-compatible client.

BASE URL
https://aelder.dev/v1
API documentation ↗

Compare DeepSeek model prices or follow the Python and JavaScript SDK setup. n8n connection guide covers a small text workflow.

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["AELDER_API_KEY"],
    base_url="https://aelder.dev/v1",
)

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

print(response.choices[0].message.content)
MODELdeepseek-v4.1-flashChat Completions
02 / MODEL BENCHMARKS

DeepSeek V4.1 Flash benchmarks.

Compare models in the AELDER catalog on the same external measure. The Artificial Analysis Intelligence Index combines evaluations of model capability. Higher is better; the score is not a percentage.

Artificial Analysis Intelligence Index

VERSION 4.3.2 · INDEX POINTS · HIGHER IS BETTER
DeepSeek V4.1 Flash45
41 scored catalog models
Catalog models and their external Artificial Analysis evaluation configurations
ModelSource configurationIndex
Claude Opus 5.5Claude Opus 5.5 (Max, Default Fallback)58
Claude Sonnet 5.5Claude Sonnet 5.5 (Max, Default Fallback)56
Claude Fable 5.1Claude Fable 5.1 (Max, Default Fallback)53
GPT 6 AstraGPT-6 Astra (Max)53
GPT 6.1 SolGPT-6.1 Sol (Max)52
Claude Opus 5Claude Opus 5 (Max)51
Claude Fable 5Claude Fable 5 (Max, Opus 4.8 Fallback)50
GPT 6 SolGPT-6 Sol (Max)48
GPT 5.6 SolGPT-5.6 Sol (Max)47
DeepSeek V4.1 FlashCurrentDeepSeek V4.1 Flash 1017 (Max)45
GLM 5.3GLM-5.3 (Max)45
Qwen3.8 Max 0902Qwen3.8 Max (0902)45
Grok 4.6Grok 4.6 (Xhigh)44
Kimi K3Kimi K3 (Max)44
Claude Haiku 5.5Claude Haiku 5.5 (Max)43
Claude Opus 4.8Claude Opus 4.8 (Max)42
GLM 5.3 FlashGLM-5.3-Flash42
GPT 5.6 TerraGPT-5.6 Terra (Max)42
Claude Opus 4.7 (1M)Claude Opus 4.7 (Max)41*
Gemini 3.8 FlashGemini 3.8 Flash (High)41
Qwen3.8 2.4T-A95BQwen3.8 2.4T A95B40
Qwen3.8 MaxQwen3.8 Max40
Claude Sonnet 5Claude Sonnet 5 (Max)38
GPT 6 LunaGPT-6 Luna (Max)38
GPT 5.6 LunaGPT-5.6 Luna (Max)37
DeepSeek V4 ProDeepSeek V4 Pro 0813 (Max)36
GLM 5.2GLM-5.2 (Max)34
Qwen3.8 27BQwen3.8 27B (Xhigh)34
GPT 5.3 CodexGPT-5.3 Codex (Xhigh)33*
Claude Opus 4.6Claude Opus 4.6 (Max)32*
Claude Sonnet 4.6Claude Sonnet 4.6 (Max)30
Gemini 3.1 ProGemini 3.1 Pro Preview30
Claude Opus 4.5Claude Opus 4.5 (Reasoning)29*
MiniMax M3MiniMax-M329
Kimi K2.6Kimi K2.6 (Reasoning)27
GLM 5.1GLM-5.1 (Reasoning)26
Kimi K2.7 CodeKimi K2.7 Code26
Hy3Hy325
DeepSeek V4 FlashDeepSeek V4 Flash 0420 (Max) · April 2026 reference24
Kimi K2.5Kimi K2.5 (Reasoning)23*
MiniMax M2.7MiniMax-M2.723
Current modelScroll to explore all models →Sources checked 21 Oct 2026

DeepSeek V4 Flash uses the April 0420 release reference, labelled in the chart and table. External results refer to the labelled source configurations, which may differ from AELDER’s configuration. They do not measure AELDER API speed or uptime. Source score markers (*) are preserved.

Why are 4 catalog models missing a score?

41 of 45 catalog models have a source reference on this index version. A missing result is not a zero score. These models remain in the catalog.

KEEP EXPLORING

DeepSeek V4.1 Flash alternatives.

Explore all models ↗
MODEL DETAILS

DeepSeek V4.1 Flash
questions, answered.

Which DeepSeek V4.1 Flash release is this?
This entry refers to the 1017 release dated 17 October 2026. Select deepseek-v4.1-flash on AELDER. The external benchmark is explicitly labelled DeepSeek V4.1 Flash 1017 (Max).
How does Flash compare with DeepSeek V4 Pro on price?
DeepSeek V4.1 Flash costs $0.0135 per million input tokens and $0.054 per million output tokens. DeepSeek V4 Pro costs $0.0924 for input and $0.2772 for output. These are the current AELDER rates; the chart compares the labelled external model evaluations. Compare DeepSeek V4 Pro API pricing.
BUILD WITH AELDER

Your next idea,
one API away.

Get API key

One key. Multiple models. Pay as you go.