Synapse GardenSynapse Garden
DeepSeek · MultimodalReleased 2026-09-29

deepseek-v4.1-flash-fast

deepseek/deepseek-v4.1-flash-fast id

Higher-throughput variant of DeepSeek V4.1 Flash for responsive coding, reasoning, and agentic workloads.

ReasoningTool useChatStructured output
Type
Use deepseek-v4.1-flash-fast
# Drop-in OpenAI-compatible client
$ import { generateText } from 'ai'
$ 
$ const { text } = await generateText({
$   model: 'deepseek/deepseek-v4.1-flash-fast',
$   baseURL: 'https://synapse.garden/api/v1',
$   apiKey: process.env.MG_KEY,
$   prompt: 'Why is the sky blue?',
$ })
1.0M
CONTEXT WINDOW
32.8K
MAX OUTPUT
$0.660/M
INPUT · PER M
$2.64/M
OUTPUT · PER M
PRICING

List prices, every modality.

RatePer million tokens · USD
Input$0.660/M
Output$2.64/M
Cache read$0.015/M
Honest list pricesHow we calculate prices
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FAQ · DEEPSEEK-V4.1-FLASH-FAST

Frequently asked

01 / 04

How do I call deepseek-v4.1-flash-fast from my code?

Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘deepseek/deepseek-v4.1-flash-fast’ and supply your Synapse Garden API key. No code changes beyond the base URL.

02 / 04

How much does deepseek-v4.1-flash-fast cost?

Input: $0.660/M per million tokens. Output: $2.64/M per million tokens. The free tier includes a million tokens every month at no cost.

03 / 04

What's the context window for deepseek-v4.1-flash-fast?

deepseek-v4.1-flash-fast supports a context window of 1.0M tokens, with a maximum output of 32.8K tokens.

04 / 04

Do I need a separate Anthropic or OpenAI account?

No. Synapse Garden is the single API surface — one key gives you OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, Cohere, and more. Billing, rate limits, and audit logs are unified.

READY

Try deepseek-v4.1-flash-fast in three minutes.

Sign up, create a key, drop our base URL into your existing client. The free tier includes a million tokens every month — no credit card.

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