LLM Comparison
Leanstral 1.5 vs Maple-Preview
Side-by-side specs, pricing & capabilities · Updated August 2026
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2/6 models| Organization | ||
| OpenTools Score | 50 | |
| Family | Leanstral | Maple |
| Status | Current | Current |
| Release Date | Jun 2026 | Aug 2026 |
| Context Window | 256K tokens | 131K tokens |
| Input Price | Free | Free |
| Output Price | Free | Free |
| 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. | Open-source model card; no hosted API pricing found in the official source. Local inference costs depend on user hardware and runtime. |
| Capabilities | textreasoningcodingformal-verificationtool-usestructured-output | textreasoningcodeon-device-inference |
| Max Output | 128K tokens | 131K tokens |
| API Identifier | labs-leanstral-1-5 | deepgrove/maple-preview |
| Benchmarks | ||
| miniF2F | 100mistral | — |
| PutnamBench | 587mistral | — |
| FLTEval pass@8 | 43.2mistral | — |
| LiveCodeBench v6 | — | 75.1DeepGrove model card |
| AIME 2026 | — | 87.5DeepGrove model card |
| HMMT 2026 | — | 78.8DeepGrove model card |
| GPQA Diamond | — | 73.5DeepGrove model card |
| View Leanstral 1.5 | View Maple-Preview | |
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| Leanstral 1.5Cheapest | $0.00 | $0.00 | $0.00 | — |
| Maple-PreviewCheapest | $0.00 | $0.00 | $0.00 | — |
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.
DeepGrove
Maple-Preview
Maple-Preview is DeepGrove’s open-source 20B-A1B ternary-weight reasoning LLM for efficient on-device inference. The model card reports 20.2B total parameters, 1.49B active parameters, a 131,072-token context window, and 5.31 GB checkpoint size.
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