Moonshot AI
Kimi K3
Moonshot AI’s proprietary long-context model family for agentic and multimodal API workloads.
OpenRouter-informed model coverage
Closed-Source Models
Proprietary frontier model families available through hosted APIs. This view separates API access from releases that can be downloaded and self-hosted.
Anthropic
Claude
Anthropic’s frontier API model family, including Claude Opus, Sonnet and Haiku.
OpenAI
GPT-5
OpenAI’s proprietary frontier GPT family for general reasoning, coding and multimodal work.
Gemini 2.5
Google’s proprietary multimodal models, available in Pro, Flash and Flash-Lite service tiers.
xAI
Grok 4.6
xAI's proprietary frontier model for long-running agents, coding, knowledge work and interactive visual projects.
Mistral AI
Mistral Large
Mistral’s flagship proprietary API model for general-purpose and enterprise workloads.
Cohere
Command A
Cohere’s enterprise-focused model line for retrieval, tools and business workflows.
Amazon
Amazon Nova
Amazon’s proprietary multimodal foundation-model family available through Bedrock.
Perplexity
Sonar
Perplexity’s proprietary answer-engine model family with web-grounded API capabilities.