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Leanstral 1.5

Pricing & Specs API
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Leanstral 1.5 is Mistral AI's language model with a 256K context window. An updated version of Mistral's Leanstral sub-brand, offering improved performance in a lightweight, resource-efficient LLM.
Specifications
Canonical IDmistral-leanstral-1-5
TypeLanguage
StatusActive
CreatorMistral AIMistral AI
Context Window256K tokens
Input ModalitiesText
Output ModalitiesText

Capabilities

Input1/5
Text✓
Image·
Audio·
Video·
PDF·
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities0/13
Reasoning·
Adaptive Reasoning·
Function Calling·
Parallel Function Calling·
Structured Outputs·
Native JSON Schema·
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching·
Assistant Prefill·

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
Leanstral 1.5—256K——Current
Leanstral—256K——Available

Model IDs

labs-leanstral-1-5
mistral-leanstral-1-5