Change in correct-patch rate with fix instructions by baseline difficulty (%)

0+10+20+30+40IMPROVEMENT WITH FIXED INSTRUCTIONS(%)DIFFICULTY TIER+12.50%+25.00%+31.25%moderaten=10 vulnerabilitieshardn=9 vulnerabilitiesvery hardn=12 vulnerabilities
Figure 4. Change in correct-patch rate after adding fix instructions, compared with the baseline across all four models. Tiers count how many baseline models fixed each vulnerability correctly: moderate = 3 of 4, hard = 2 of 4, and very hard = 0–1 of 4.