FINER-SQL-0.5B-v2

FINER-SQL 0.5B SQL-Writer continually trained with GRPO (format + execution reward) on CoRE-DB, the compact counterexample-enriched database environment of Small Language Models for Text-to-SQL against Spurious Correctness. Checkpoint step 6750 (dev-selected). Code: github.com/thanhdath/core-db.

BIRD dev EX Spider dev EX Spider dev TS Spider test EX
53.59 (822/1534) 76.31 (789/1034) 67.89 (702/1034) 75.27 (1616/2147)

k = 30 samples, T = 1.0, seed 42, at most 2048 new tokens, vote-after-verify selection, official evaluators (BIRD: evaluation_bird_ex.py with SQLite 3.45.3 and --meta_time_out 3600; Spider: taoyds/test-suite-sql-eval @e97acc54, default flags; TS on the distilled Spider dev test suites). Prompts: thanhdath/core-db-evaluation-prompts (bird_dev, spider_dev; Spider test: spider_test_full_schema).

Provenance: these weights are byte-identical to thanhdath/05b-core-noam-13k-ict @ cc5327057cc295782a4de3570b9096d0f17493b8, sub-folder checkpoints/step06750/checkpoint-6750 (training step 6750). The saved predictions and the re-scoring script are in scripts/rq2/ of the code repository.

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