DeepSeek V4.1 Flash Marathon API
About
Build advanced reasoning agents with DeepSeek V4.1 Flash Marathon, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.14/1M input and $0.28/1M output tokens, native tool calling support, open weights architecture. Access DeepSeek V4.1 Flash Marathon via the Subconscious API with up to 384K output tokens.
Capabilities
Input Modalities
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Output Modalities
text
Reasoning
Yes
Limits
Context Window
5.0M
Tokens
Input Limit
5.0M
Tokens
Max Output
384K
Tokens
Pricing
Standard (per 1M tokens)
Input
$0.14
Output
$0.28
Caching (per 1M tokens)
Read
$0.0028
Frequently Asked Questions
DeepSeek V4.1 Flash Marathon by Subconscious costs $0.14 per 1M input tokens and $0.28 per 1M output tokens. Cached reads cost $0.0028 per 1M tokens.
Model Details
ID
subconscious/deepseek-v4.1-flash-marathon
Provider
SubconsciousFamily
deepseek-flash
Release Date
Sep 10, 2026
Knowledge Cutoff
May 1, 2025
API Integration
NPM Package
@ai-sdk/anthropic
Environment Variables
SUBCONSCIOUS_API_KEY
API Base URL
https://api.subconscious.dev/v1