Update Airy research model card (0.8b)

README.md

@@ -13,3 +13,23 @@
 - These files are more experimental than the release bundle.
 - Production-facing use should prefer the release bundle.
 - If prompting in Vietnamese, write with full accents for best consistency.
+
+## Evaluation Snapshot
+
+Research GGUFs were continued from the existing results and merged with the latest rerun on the same curated 58-question bilingual benchmark.
+
+| Quant | Think | No-Think | Avg | Status |
+|---|---:|---:|---:|---|
+| Q3_K_M | 74.1% | 72.4% | 73.2% | Best current research quant |
+| IQ3_M | 60.3% | 60.3% | 60.3% | Heavy quality loss |
+| IQ2_M | 20.7% | 19.0% | 19.8% | Below usable threshold |
+| IQ2_XS | 5.2% | 3.4% | 4.3% | Triggered early-stop for lower bits |
+
+## Research Guidance
+
+- Public research recommendation: **Q3_K_M** only
+- **IQ3_M** is still uploadable for experiments, but quality is clearly degraded
+- The rerun auto-stopped below **IQ2_XS** because average pass rate fell under 50%, so lower-bit quants should be considered archival artifacts rather than viable deployments
+- For any user-facing scenario, prefer the release bundle instead of this research branch
+
+For cross-family ranking and release-vs-research comparison, see `results/COMPARISON.md` in the workspace.