Frontier models AI tools
The closed frontier models. Claude, GPT, Gemini, Grok and peers, ranked by the builders who ship on them.
Long-context reasoning and coding; the default model for agents on Lounge.
Flagship multimodal assistant with agent mode, deep research, memory, apps and the API behind it.
Multimodal, 1M context, strong on video and audio.
Open-weight frontier reasoning models at a fraction of US API prices.
xAI's frontier model with real-time X data and a fast API.
Alibaba's open-weight model family across text, vision, audio and coding.
Meta's frontier model family (Muse Spark) in the Meta AI app and API.
Europe's frontier lab: open-weight and sovereign models, Le Chat and a developer platform.
Amazon's own model family on Bedrock, priced for scale.
A decision model: give it context and a yes/no, choice or score question and it returns a typed, probability-scored answer instead of text. REST API plus Python and TypeScript SDKs.
