Abacus ChatLLM
All-models hosted chat/agent platform at $10/month; enterprise features.
A hosted agent - I haven’t tried it but several people recommended it.
ChatLLM (from Abacus.AI) is an “AI super-assistant” subscription: one ~$10/month account for a rotating roster of all the frontier models (the FAQ names GPT-6 variants, Sonnet/Opus, Gemini, Grok, Qwen, DeepSeek, Kimi, GLM plus ~20 more, updated 24–48h after releases), image and video generation, a coding agent CLI, and a general Abacus AI Agent. The differentiators are breadth plus enterprise plumbing: team seats, conversation imports from ChatGPT/Claude, connectors to GDrive/Slack/Confluence, custom chatbots on your data, SOC-2 Type-2 and HIPAA. Hosted only — nothing local — with generous-feeling token limits and automatic model-switching when rate-limited.
Source: https://chatllm.abacus.ai/faq