Shadow Siren API
About
Build advanced reasoning agents with Shadow Siren, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.08/1M input and $0.33/1M output tokens, native tool calling support, open weights architecture. Access Shadow Siren via the NanoGPT API with up to 33K output tokens.
Capabilities
Input Modalities
textimage
Output Modalities
text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsOpen
Temperature
Fixed
Attachment
Supported
Limits
Context Window
262K
Tokens
Input Limit
262K
Tokens
Max Output
33K
Tokens
Pricing
Standard (per 1M tokens)
Input
$0.08
Output
$0.33
Caching (per 1M tokens)
Read
$0.04
Frequently Asked Questions
Shadow Siren by NanoGPT costs $0.08 per 1M input tokens and $0.33 per 1M output tokens. Cached reads cost $0.04 per 1M tokens.
Model Details
ID
google/gemma-4-26b-a4b-it-shadowsiren
Provider
NanoGPTFamily
gemma
Release Date
Aug 28, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
NANO_GPT_API_KEY
API Base URL
https://nano-gpt.com/api/v1