LLM Comparison
Leanstral 1.5 vs LFM2-24B-A2B
Side-by-side specs, pricing & capabilities · Updated August 2026
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2/6 modelsSame tier:
| Organization | ||
| OpenTools Score | ||
| Family | Leanstral | LFM2-24B-A2B |
| Status | Current | Current |
| Release Date | Jun 2026 | Feb 2026 |
| Context Window | 256K tokens | 33K tokens |
| Input Price | Free | $0.03/M tokens |
| Output Price | Free | $0.12/M tokens |
| Pricing Notes | Mistral model card lists Leanstral 1.5 price as $0. Changelog says the Labs endpoint is scheduled to retire on 2026-09-30. | — |
| Capabilities | textreasoningcodingformal-verificationtool-usestructured-output | textcode |
| Max Output | 128K tokens | — |
| API Identifier | labs-leanstral-1-5 | liquid/lfm-2-24b-a2b |
| Benchmarks | ||
| miniF2F | 100mistral | — |
| PutnamBench | 587mistral | — |
| FLTEval pass@8 | 43.2mistral | — |
| View Leanstral 1.5 | View LFM2-24B-A2B | |
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| Leanstral 1.5Cheapest | $0.00 | $0.00 | $0.00 | — |
| LFM2-24B-A2B | $0.03 | $0.06 | $0.09 | +0% |
Mistral AI
Leanstral 1.5
Leanstral 1.5 is Mistral AI free Lean 4 formal proof-engineering model for automated theorem proving, autoformalization, and real-world code verification. Official Mistral docs list it as a Labs model with 119B total parameters, 6.5B active parameters, a 256k context window, 128k max output, $0 pricing, and the labs-leanstral-1-5 API identifier.
Liquid AI
LFM2-24B-A2B
LFM2-24B-A2B is a large language model from Liquid AI. Supports up to 32,768 token context window. Available from $0.03/M input tokens.
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