The smallest model in DeepSeek's new architecture family, with native image understanding. It runs in thinking mode by default and also offers a non-thinking mode; DeepSeek reports it outperforms its earlier DeepSeek-V4-Pro flagship on benchmarks.
- Modalities
- text, image → text
- In / out price30% off
List price $0.30 / $1.20$0.209351 / $0.837404per 1M tokens- Context
- 1Mtokens
- Released
- 2026-09-10
Pricing
Prices in US dollars, charged from your prepaid balance as you go. No subscription.
30% off30% below the list price, on every token price.
- Input
List price $0.30$0.209351/ 1M tokens- Output
List price $1.20$0.837404/ 1M tokens- Cache read
List price $0.006$0.004187/ 1M tokens- Cache write
- $0/ 1M tokens
Specs
Limits and capabilities as published by the model’s provider.
- Context
- 1Mtokens
- Max output
- 384Ktokens
- Input types
- text, image
- Output types
- text
- Released
- 2026-09-10
- Open weights
- Hugging Face
- License
- MIT
- Tokens, last 7 days
- 82Mtokens
Call this model
The examples read your key from the CHEAPAIMODEL_API_KEY environment variable.
curl https://api.cheapaimodel.ai/v1/chat/completions \
-H "Authorization: Bearer $CHEAPAIMODEL_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "deepseek-v4-1-flash",
"messages": [{"role": "user", "content": "Hello!"}]
}'Endpoints
Endpoints that accept this model, each with its API reference.
- API reference
POST /v1/chat/completionsChat Completions · OpenAI compatible - API reference
POST /v1/responsesResponses · OpenAI compatible
Compare with other models
DeepSeek-V4.1-Flash side by side with each other model in the catalog: price, context and the same code.
From the blog
Posts on our blog that cover DeepSeek-V4.1-Flash: pricing, setup and troubleshooting.
- DeepSeek API Payment: PayPal, Credit Cards and Top-Ups
Does the DeepSeek API take PayPal or credit cards? Sign-up, top-ups, refunds and invoices outside China, and when one multi-model account helps.
- OpenAI-Compatible APIs: A Migration Checklist for Developers
Move an app to an OpenAI-compatible API safely. Check base URLs, model IDs, Chat versus Responses, structured output, streaming, and rollback.
- DeepSeek API Not Working? Fix Authentication, Billing, and Rate-Limit Errors
Diagnose DeepSeek API failures by checking the provider, key, endpoint, request format, balance, and rate limits before retrying or changing services.