leanstral-1-5@eu

Name: leanstral-1-5@eu
Brand: misc
SKU: misc/leanstral-1-5-eu

misc·misc/leanstral-1-5-eu·GA·Closed·NEW

Leanstral 1.5 is an updated Lean 4 formal proof engineering model from Mistral AI, optimized for automated theorem proving and autoformalization. It has 119B total parameters with 6.5B active and supports a 256K token context window. It supports native function calling and structured output.

At a glance

Reference price$0 / $0 per 1M

Cache read — · Requesty

Lowest paidNo paid channels

1 more $0 channels

Context262,144

Output limit32,768

Capabilities

Reasoning✓ Tool use✓ Structured output? TemperatureAttachments

Modalities

Text

Knowledge cutoff—

Released / updated2026-05-27 / 2026-05-27

Quality & performance

Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.

Available at 1 providers0 with public prices · 1 free

Priced only

Provider	Tier	Input	Output	Cache read	Cache write	Context	Output limit	Status
Requesty leanstral-1-5@eu	Gateway	Free		—	—	262,144	32,768

Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.

Your usage cost

Input tokens / month

Output tokens / month

Cache hit rate

Common scenarios

This model is $0 across all listed channels (Requesty).

Price historyone sample accumulated per data sync

Input list $0Output list $0Min blended —

Price history accumulates from each data sync; currently only 1 sample(s) (2026-08-19). Each future sync adds a point, and once accumulated a line is drawn here.