Leanstral 1.5 发布
阅读原文· docs.mistral.aiLeanstral 1.5 是 Lean 4 形式证明工程模型的更新版，专为自动定理证明和自动形式化优化。总参数量 119B，激活参数 6.5B，上下文窗口 256k，免费使用。支持 Chat Completions、Function Calling、Agents、Structured Outputs、OCR、Embeddings 等 API 功能。
June 30, 2026
Labs v 1.5
Leanstral 1.5
An updated Lean 4 formal proof engineering model optimised for automated theorem proving and autoformalization. 119B total parameters, 6.5B active.
labs-leanstral-1-5
Speed
Performance
Modalities
Context
i
256k
Price
i
$0
Speed
Performance
Modalities
Context
256k
Price
$0
FEATURES WEIGHTS
Features
Chat Completions /v1/chat/completions
Function Calling /v1/chat/completions/v1/conversations
Agents & Conversations /v1/agents/v1/conversations
Built-In Tools /v1/agents/v1/conversations
Structured Outputs /v1/chat/completions/v1/conversations
Predicted Outputs /v1/chat/completions/v1/conversations
Prefix /v1/chat/completions/v1/conversations
Annotations - Structured /v1/ocr
Document QnA /v1/chat/completions/v1/conversations
Chat Moderations /v1/chat/moderations
Transcriptions /v1/audio/transcriptions
Text to Speech /v1/audio/speech
Timestamps /v1/audio/transcriptions
Other Models
Other Models
### Mistral Medium 3.5 v 26.04
### Voxtral TTS v 26.03
### Mistral Small 4 v 26.03