Solar Pro 2

Solar Mini 4

Upstage

Solar Mini 4 is Upstage’s compact agent model for high-volume retrieval, structured generation, and tool-driven workflows. Its mixture-of-experts architecture has 35B total parameters and 3B active per token, with a 512K context and up to 128K output tokens. It supports parallel function calling and is offered through Upstage’s hosted API, with on-premises deployment options. The model emphasizes compute efficiency for repetitive work while retaining long-context reasoning. On-premises availability does not imply publicly downloadable weights; memory requirements still reflect the full 35B parameters.

Grok 4.7

xAI

Grok 4.7 is a proprietary xAI language-model release. The September frontier update improves coding, agentic tasks, and knowledge work and is available through the API. It uses text and image inputs and text output, configurable reasoning effort, and tool interfaces. A faster serving option uses the same underlying model and is recorded as a deployment variant, not a separate checkpoint. Weights are not publicly downloadable. Published agent and coding results depend on the evaluation harness, tool permissions, and inference settings, so no unsupported standalone benchmark score is assigned.

Muse Spark 1.3

Meta

Muse Spark 1.3 is a proprietary Meta multimodal reasoning model for coding and agentic knowledge work. The 1.3 update improves long instruction adherence, multi-task coordination, self-awareness of task limits, and cooperation with users during extended work. It accepts text, images, video, and audio and produces text; the API specifies a 1,048,576-token context for these versions. Standard and, where offered, Contributor access use the same model capabilities but different data-use terms. Contributor access is a serving tier rather than a separate model. Future open-weight plans are not a weight release.