LongCat 2.0 API
About
Build advanced reasoning agents with LongCat 2.0, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.30/1M input and $1.20/1M output tokens, native tool calling support, open weights architecture. Access LongCat 2.0 via the OpenRouter API with up to 262K output tokens.
Capabilities
Input Modalities
text
Output Modalities
text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsOpen
Limits
Context Window
1.0M
Tokens
Input Limit
1.0M
Tokens
Max Output
262K
Tokens
Pricing
Standard (per 1M tokens)
Input
$0.30
Output
$1.20
Caching (per 1M tokens)
Read
$0.0060
Frequently Asked Questions
LongCat 2.0 by OpenRouter costs $0.30 per 1M input tokens and $1.20 per 1M output tokens. Cached reads cost $0.0060 per 1M tokens.
Model Details
API Integration
NPM Package
@openrouter/ai-sdk-provider
Environment Variables
OPENROUTER_API_KEY
API Base URL
https://openrouter.ai/api/v1