DeepSeek · Text

DeepSeek V4.1 Flash API pricing

DeepSeek V4.1 Flash through one prepaid, OpenAI-compatible key: $0.15 input, $0.60 output per 1M tokens, the provider’s list price with nothing added per request.

Model id deepseek-flash Add credit

DeepSeek V4.1 Flash price per 1M tokens

Input
$0.15
per 1M tokens
Cached input
$0.003
per 1M tokens, on a cache hit
Output
$0.60
per 1M tokens

2× at peak DeepSeek charges double Mon–Fri 01:00–04:00 and 06:00–10:00 UTC. You pay the rate in force when the request runs.

Off-peak and peak prices per 1M tokens
Per 1M tokensOff-peakPeak
Input$0.15$0.30
Cached input$0.003$0.006
Output$0.60$1.20

DeepSeek’s list price, in US dollars. Tokens.Pay adds a 5% fee (minimum $0.79) when you add credit, never per request.

What DeepSeek V4.1 Flash is good at

The provider's recommended tier. 1M context, image understanding, tool calls.

In short: fast everyday reasoning, 1M context.

  • Tool calls
  • JSON output
  • Image understanding
  • Thinking mode

Text model, called at /v1/chat/completions. Listed under text generation, reasoning and vision.

DeepSeek V4.1 Flash context window and limits

Provider
DeepSeek
Type
Text
Context window
1M tokens
Max output
384K tokens
Endpoint
/v1/chat/completions
Model id
deepseek-flash

What DeepSeek V4.1 Flash costs per request

Typical requests at the list rate, worked out once. Your own counts go in the calculator below.

What typical DeepSeek V4.1 Flash requests cost at the list price
RequestInputOf which cachedOutputPer requestPer 1,000
Short chat reply1,500—300$0.000405$0.4050
Support bot, cached system prompt6,0005,000500$0.000465$0.4650
Summarise a 100-page document60,000—1,500$0.009900$9.90
Agent step, long cached context200,000180,0002,000$0.004740$4.74

Token counts are examples; the rates are DeepSeek’s list prices off-peak (peak hours cost double). Tokens.Pay adds nothing per request.

DeepSeek V4.1 Flash cost calculator

Set the size of a typical request. Prices are per token, so the estimate is exact for those counts.

The share of input the provider serves from its cache, billed at $0.003 per 1M.

Per request
$0.000453
Per 1,000 requests
$0.4530
$25 of credit covers
55,187requests

Call DeepSeek V4.1 Flash with the OpenAI SDK

Base URL https://api.airuntime.dev/v1, your key as the bearer token, and model set to deepseek-flash.

curl

curl https://api.airuntime.dev/v1/chat/completions \
  -H "Authorization: Bearer $TOKENS_PAY_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "deepseek-flash",
    "messages": [{"role": "user", "content": "Say hello in five words."}]
  }'

Who processes DeepSeek V4.1 Flash requests

Your code calls AI Runtime directly. It forwards the request to the provider and keeps only the bill.

Processing and storage

Model provider
DeepSeek, mainland China · data terms
Fallback
Fireworks AI, United States · data terms
Fallback
DeepInfra, United States · data terms
Gateway
AI Runtime, AWS us-east-1

DeepSeek’s own API serves the model first. If it cannot, AI Runtime sends the request to Fireworks AI or DeepInfra, which run the same open model in the US.

Not stored by Tokens.Pay or AI Runtime. Prompts and outputs exist in memory only while the request runs; we keep the billing record. The provider processes the request under its own terms. Zero data retention, exactly

Compare DeepSeek V4.1 Flash with similar models

All 16 models
DeepSeek V4.1 Flash compared with similar models
ModelProviderInput /1MCached /1MOutput /1MContext
DeepSeek V4.1 Flash (this page) DeepSeek $0.15$0.003$0.601M
GPT-6 Luna OpenAI $0.10$0.01$0.501.05M
GPT-6.1 Terra OpenAI $1.00$0.05$5.001.05M
GPT-6.1 Sol OpenAI $2.00$0.10$10.001.05M
Kimi K3.1 Pro Moonshot AI $1.92$0.192$10.041M
Kimi K3.1 Pro Highspeed Moonshot AI $3.84$0.192$20.081M

DeepSeek V4.1 Flash API questions

How much does the DeepSeek V4.1 Flash API cost?

$0.15 per 1M input tokens, $0.003 per 1M cached input tokens and $0.60 per 1M output tokens: DeepSeek’s list price off-peak (it doubles at the provider’s weekday peak). Tokens.Pay adds nothing per request; a 5% fee (minimum $0.79) applies when you add credit.

What is the model id for DeepSeek V4.1 Flash?

Send model "deepseek-flash" to https://api.airuntime.dev/v1/chat/completions with your Tokens.Pay key as the bearer token. Any OpenAI-compatible SDK works.

What is the DeepSeek V4.1 Flash context window?

1M tokens, with up to 384K output tokens per request.

Does Tokens.Pay store my DeepSeek V4.1 Flash prompts?

No. AI Runtime, the gateway your key calls, keeps prompts and outputs in memory only while the request runs and stores just the billing record. The request is processed by DeepSeek (mainland China), or as a fallback Fireworks AI or DeepInfra (United States), under the provider’s own API data terms.

Does DeepSeek V4.1 Flash support prompt caching?

Yes. Input tokens served from DeepSeek’s cache are billed at $0.003 per 1M instead of $0.15. Your Dashboard shows your cache hit rate.

Add credit, then call DeepSeek V4.1 Flash.

From $5, plus a 5% top-up fee (minimum $0.79). No subscription; paid credit never expires.

Add credit