LongCat API Platform
API platform providing access to LongCat series models with OpenAI and Anthropic compatibility, featuring 1M context window and high-throughput agentic capabilities.
Product Overview
What is LongCat API Platform?
LongCat API Platform is Meituan's AI model service that provides access to the LongCat series of large language models, including LongCat-2.0 and LongCat-Flash-Chat. The platform offers OpenAI and Anthropic API format compatibility, allowing developers to integrate LongCat models using existing SDKs and tools. LongCat-2.0 features 1.6 trillion total parameters with approximately 48B active per token and a native 1 million token context window, while LongCat-Flash-Chat delivers 560B parameters with roughly 27B active per token for high-throughput conversational and agentic tasks.
Key Features
Dual API Format Compatibility
Full compatibility with both OpenAI and Anthropic API specifications, enabling seamless integration with existing tools and SDKs by simply changing the base URL.
Massive Context Window
LongCat-2.0 supports up to 1M token context window with 128K maximum output, enabling processing of entire codebases, documents, and multi-turn conversations in a single session.
High-Throughput MoE Architecture
Mixture-of-Experts design dynamically activates 27B-48B parameters per token from 560B-1.6T total parameters, delivering frontier-level performance with efficient compute costs.
Agentic Task Optimization
Models excel at tool use, function calling, and multi-step interactions with consistent behavior across extended sessions, making them ideal for AI agent development.
Flexible Access Tiers
Free tier offering up to 5M tokens per day, plus pay-as-you-go pricing and token packs with no expiration, accommodating various usage levels and budgets.
Use Cases
- AI Agent Development : Build autonomous agents that reliably execute multi-step tasks with tool calling and maintain consistent behavior across extended conversations.
- Code Analysis and Refactoring : Leverage 1M token context to analyze entire repositories, trace cross-file dependencies, and refactor large codebases in a single session.
- High-Volume Chat Applications : Deploy instruction-following chatbots and conversational interfaces with fast inference speeds exceeding 100 tokens per second.
- Enterprise Document Processing : Process lengthy documents, legal contracts, and technical manuals within the massive context window for comprehensive analysis and summarization.
FAQs
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