Labs Leanstral 1.5.1 API Pricing
As of October 10, 2026, Labs Leanstral 1.5.1 is free to use on Mistral AI. It has a 262,144-token context window and returns up to 131,072 tokens per response.
- Price
- Free
- Context window
- 262,144 tokens
- Max output
- 131,072 tokens
- Providers
- 1
- Added to LiteLLM
- August 29, 2026
Labs Leanstral 1.5.1 pricing by provider
1 listing across 1 provider. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.
| Provider | Model name in LiteLLM | Input | Output | Context |
|---|---|---|---|---|
| Mistral AI | mistral/labs-leanstral-1-5-1 | $0 | $0 | 256K |
What Labs Leanstral 1.5.1 costs in practice
1,000 requests with 2,000 input and 500 output tokens each
| Mistral AI | $0 |
100 long-document requests with 100,000 input and 2,000 output tokens each
| Mistral AI | $0 |
Labs Leanstral 1.5.1 features
- Function calling
- Structured output
Use Labs Leanstral 1.5.1 with LiteLLM
Call Labs Leanstral 1.5.1 through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/chat/completions. LiteLLM tracks the cost of every request at these prices.
from litellm import completion
response = completion(
model="mistral/labs-leanstral-1-5-1",
messages=[{"role": "user", "content": "Hello!"}],
)model_list:
- model_name: labs-leanstral-1-5-1
litellm_params:
model: mistral/labs-leanstral-1-5-1
api_key: os.environ/MISTRAL_API_KEYcurl http://0.0.0.0:4000/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer sk-1234" \
-d '{
"model": "labs-leanstral-1-5-1",
"messages": [{"role": "user", "content": "Hello!"}]
}'Labs Leanstral 1.5.1 FAQ
How much does Labs Leanstral 1.5.1 cost?
Labs Leanstral 1.5.1 is free to use on Mistral AI.
What is the context window of Labs Leanstral 1.5.1?
Labs Leanstral 1.5.1 has a 262,144-token context window and returns up to 131,072 tokens per response.
Which providers offer Labs Leanstral 1.5.1?
Labs Leanstral 1.5.1 is available from Mistral AI through LiteLLM, using the model name mistral/labs-leanstral-1-5-1.
How do I call Labs Leanstral 1.5.1 with an OpenAI-compatible API?
Use the LiteLLM Python SDK with model="mistral/labs-leanstral-1-5-1", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/chat/completions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.
What features does Labs Leanstral 1.5.1 support?
Labs Leanstral 1.5.1 supports function calling and structured output.
When did LiteLLM add Labs Leanstral 1.5.1?
Labs Leanstral 1.5.1 was added to LiteLLM's model price file on August 29, 2026.
Sources
Prices come from LiteLLM's open-source model_prices_and_context_window.json, which LiteLLM uses to calculate the cost of every request. Provider pricing pages:
LiteLLM docs: Mistral AI.
Provider pages: Mistral AI.
