Mistral Large 4

As of November 9, 2026, Mistral Large 4 by Mistral costs $0.70 per 1M input tokens and $2.10 per 1M output tokens, with a 1M-token context window.

Mistral Large 4 is the largest model Mistral has built and the first to put a trillion parameters behind a European price card. Announced October 6, 2026 as a public preview on Mistral Studio and the Mistral API under the name mistral-large-4-0, it is a mixture-of-experts with roughly 1 trillion total parameters and 52 billion active per token, natively multimodal. The price settled when the weights shipped: $0.70 per million input tokens, $0.07 cached, and $2.10 output, after a preview that charged a sale rate of $0.68, $0.07, and $2.09 against a $1.36, $0.14, and $4.18 list. Mistral's model card advertises a 1 million token context window, though third-party registries showed 512K on launch day and OpenRouter documents a 262,144 token completion cap, so verify the window your provider actually serves before you design around it. The launch post publishes a full self-reported table: DeepSWE v1.1 at 61.7 percent, SWE-Atlas-QnA at 59.4, Terminal-Bench 4 at 28.3, a Coding Agent Index of 49.8, AutomationBench at 59.9, 1,393 Elo on AA-Briefcase, Cybench at 93 percent, 82 percent on a vulnerability reproduce-and-patch test that Mistral says is the highest reported, and 42 percent on Dense 200 visual grounding against 41 for GPT-6 Astra. The most honest row is the blind human coding evaluation Mistral commissioned from Surge AI, where Large 4 scored 3.74 out of 5, second of five and behind Claude Opus 5 at 4.22. The open-weight part is now a fact: on October 29, 2026 Mistral published the weights on Hugging Face under the Mistral Ecosystem Open-Weight license, a modified MIT that permits use, modification, fine-tuning, and commercial use but requires anyone operating a model-as-a-service business to sign a separate commercial license first. Self-hosting runs on vLLM or SGLang. It is also the settled flagship now rather than a preview to evaluate: Mistral deprecated Medium 3.5 and Large 3 on October 31, 2026, both retiring April 30, 2027, and names Large 4 as the replacement for each.