How much does Leanstral 1.5 cost per month?

For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, Leanstral 1.5 costs about $0 per month at Mistral's list prices (free input, free output).

Does Leanstral 1.5 support prompt caching?

No cache read price is published for Leanstral 1.5.

How long is Leanstral 1.5's context window?

Leanstral 1.5 accepts up to 262,144 tokens (262K) of context and returns up to 128,000 tokens per response.

Leanstral 1.5 API Pricing

Mistral has deprecated this model. The price is kept here for reference; check the provider's documentation before building on it.

Mistral · released Jun 30, 2026 · 262K context · API model ID labs-leanstral-1-5-1

Leanstral 1.5 by Mistral API pricing: free input and free output (provider list price via models.dev, Oct 10, 2026).

Prices

Leanstral 1.5 prices, USD per 1M tokens
Price	USD per 1M tokens
Input	Free
Output	Free
Cache read	Not published
Cache write	Not published

Mistral's list price for its own API, as compiled by models.dev and checked Oct 10, 2026, 09:00 UTC. Prices on cloud platforms and resellers can differ. Provider documentation

Estimated monthly cost

per month

per day: $0
per request: $0

Cost = input tokens × input price + output tokens × output price, 30 days a month. Cached input uses the cache read price. Cache write fees are not included.

Compare this workload across models

Monthly cost by workload

Workload	Per month
Chatbot1,000 in / 500 out tokens, 10,000 requests a day	$0/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day	$0/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input	$0/mo

Context and capabilities

Context: 262,144 tokens
Max output: 128,000 tokens
Input: text, image
Output: text
Knowledge cutoff: Not published
Open weights: Yes
Tool calling: Yes
Reasoning: Yes
Structured outputs: Yes

Capabilities and limits as listed by models.dev.

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Price history

No price changes since we started tracking on Oct 8, 2026.

Questions

How much does Leanstral 1.5 cost per month?: For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, Leanstral 1.5 costs about $0 per month at Mistral's list prices (free input, free output).
Does Leanstral 1.5 support prompt caching?: No cache read price is published for Leanstral 1.5.
How long is Leanstral 1.5's context window?: Leanstral 1.5 accepts up to 262,144 tokens (262K) of context and returns up to 128,000 tokens per response.