Step 1: Recall the WTO base count.
For several years the WTO had 164 member states.
Step 2: Add recent members.
Two countries, Comoros and Timor-Leste, completed accession and joined.
Step 3: Do the sum.
\[ 164 + 2 = 166 \]
Step 4: Conclude.
As of 2026 the WTO has 166 members.
Answer: 166 (Option 2).