MathForm-8B

Name: MathForm-8B
Author: OpenBMB

OpenBMBOpen WeightsPending Human Review

MathForm-8B is OpenBMB’s language-to-code model for translating natural-language mathematical statements into Lean 4. It fine-tunes Qwen3-8B on FormalVerse with supervised learning followed by reinforcement learning using compilation and semantic-consistency feedback. The research framework retrieves Mathlib definitions and revises generated formalizations using diagnostics, supporting more faithful mathematical translation. Apache-licensed weights, approximately 367K verified examples, and evaluation code accompany the August 14 paper. This is a named mathematical language specialization; the model is distinct from the surrounding retrieval and verification pipeline. Successful compilation alone does not establish that a formal statement preserves the intended proposition.

2026-08-14

Decoder-only Transformer

Apache-2.0

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Specifications

Parameters: 8B
Architecture: Decoder-only Transformer
License: Apache-2.0
Type: text
Modalities: text

Benchmark Scores

Advanced Specifications

Model Family: MathForm
Finetuned From: Qwen3-8B
API Access: Not Available
Chat Interface: Not Available

Capabilities & Limitations

Capabilities: mathematical autoformalizationLean code generationformal reasoning
Known Limitations: Lean syntax success does not guarantee semantic equivalenceDepends on compatible Mathlib knowledge and compiler toolingSpecialized formalization behavior may not generalize to broad dialogue
Notable Use Cases: mathematical formalization researchLean statement translationverification-guided code generation

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