DeepSeek V4.1 Flash API
About
Build advanced reasoning agents with DeepSeek V4.1 Flash, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.65/1M input and $1.45/1M output tokens, native tool calling support, open weights architecture. Access DeepSeek V4.1 Flash via the Tinfoil API with up to 384K output tokens.
Capabilities
Input Modalities
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Output Modalities
text
Reasoning
Yes
Structured Output
Limits
Context Window
1.0M
Tokens
Input Limit
1.0M
Tokens
Max Output
384K
Tokens
Pricing
Standard (per 1M tokens)
Input
$0.65
Output
$1.45
Caching (per 1M tokens)
Read
$0.13
Frequently Asked Questions
DeepSeek V4.1 Flash by Tinfoil costs $0.65 per 1M input tokens and $1.45 per 1M output tokens. Cached reads cost $0.13 per 1M tokens.
Model Details
ID
deepseek-v4-1-flash
Provider
TinfoilFamily
deepseek-flash
Release Date
Sep 10, 2026
Knowledge Cutoff
May 1, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
TINFOIL_API_KEY
API Base URL
https://inference.tinfoil.sh/v1