Leanstral 1.5

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.

MAI-Thinking-1

Microsoft

MAI-Thinking-1 is Microsoft AI’s medium-inference-footprint reasoning model, first announced at Build in June and made available in public preview on Microsoft Foundry on August 12, 2026. It uses a sparse mixture-of-experts architecture and was trained in-house without third-party model distillation. The model targets mathematical reasoning, software engineering, and complex enterprise questions. Clean-data and benchmark statements are provider claims rather than guarantees of domain correctness. June announcement-only exposure is not used as its public release date.

Mistral Medium 3.5

Mistral AI

Mistral Medium 3.5 is a dense open-weight multimodal model that combines instruction following, coding, and adjustable reasoning in a single checkpoint. It launched in public preview as the default model in Le Chat and Mistral Vibe, supporting long-running software and productivity tasks, parallel tool calls, and structured outputs. A newly trained vision encoder handles variable image dimensions and aspect ratios. The modified MIT license must be checked for commercial restrictions; the published four-GPU deployment is a configuration example rather than a universal memory requirement.