# Mistral Large 4 (1T)

> Mistral's trillion-parameter multimodal MoE combines MLA with sparse token selection and cross-layer KV sharing.

| Property | Value |
| --- | --- |
| Lab | Mistral AI (France) |
| Released | 2026-10-29 |
| Decoder type | Sparse MoE |
| Family | Sparse MoE |
| Scale | 1T total, 52B active (5.2% active) |
| Context window | 1,048,576 tokens |
| Attention | MLA with modified DeepSeek Sparse Attention, index reuse, and KV sharing |
| Layer mix | 72 MLA/DSA |
| KV cache / token (bf16) | 80.75 KiB (Moderate) |
| License | Mistral Ecosystem Open-Weight License |

**Key detail:** Selects the top 2,048 tokens, reuses sparse indices across layers, and alternates three LeRoPE layers with one NoPE layer.

## Architecture concepts

- [Multi-Head Latent Attention (MLA)](https://llm-atlas-7or.pages.dev/concepts/mla.md): Keys and values are compressed into a small latent vector that is cached instead of full K/V.
- [DeepSeek Sparse Attention (DSA)](https://llm-atlas-7or.pages.dev/concepts/deepseek-sparse-attention.md): A lightweight indexer scores past tokens and each query attends only to its top-k picks.
- [IndexShare (IndexShare)](https://llm-atlas-7or.pages.dev/concepts/indexshare.md): Nearby layers reuse the token selection computed by one DSA indexer.
- [Cross-Layer KV Sharing (KV sharing)](https://llm-atlas-7or.pages.dev/concepts/kv-sharing.md): Later layers reuse key/value states produced by earlier layers.
- [Mixture of Experts (MoE)](https://llm-atlas-7or.pages.dev/concepts/moe.md): Many feed-forward experts, but a router sends each token to only a few of them.
- [No Positional Embeddings (NoPE)](https://llm-atlas-7or.pages.dev/concepts/nope.md): Some or all layers drop explicit positional encodings and rely on the causal mask.

## Benchmark (Artificial Analysis Intelligence Index)

- AA Intelligence Index v5.0: total 26 (Knowledge Work 40.6, Coding 18.9, Science 13, General 31.7)

## Links

- Architecture diagram: https://sebastianraschka.com/llm-architecture-gallery/images/architectures/mistral-large-4.webp
- config.json: https://huggingface.co/mistralai/Mistral-Large-4-1T-A52B/blob/main/config.json
- License: https://huggingface.co/mistralai/Mistral-Large-4-1T-A52B/blob/main/LICENSE
- Tech report: https://huggingface.co/mistralai/Mistral-Large-4-1T-A52B/blob/main/assets/technical_report.pdf
- Source card (source of truth): https://sebastianraschka.com/llm-architecture-gallery/#card-mistral-large-4
- Web page: https://llm-atlas-7or.pages.dev/models/mistral-large-4/
- JSON: https://llm-atlas-7or.pages.dev/api/models/mistral-large-4.json

_Data from Sebastian Raschka's LLM Architecture Gallery (https://sebastianraschka.com/llm-architecture-gallery/). Synced 2026-11-04._