Magistral Medium

Mistral Large 4

Mistral AI

Mistral Large 4, also called Le Chonk, is Mistral’s trillion-parameter multimodal flagship, first offered as a public API preview on October 6, 2026. It targets software engineering, long-running agents, visual grounding, and specialist enterprise work including finance, law, and cybersecurity. Training took place on Mistral’s European infrastructure. Its planned weight release is later in October; the preview available at the audit date does not include downloadable weights. Architecture and post-training details beyond the mixture-of-experts configuration remain limited.

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.