Adds GPT 5.5 to table for individuals with an annual plan (#61042)

Author: sophietheking

content/copilot/reference/copilot-billing/model-multipliers-for-annual-plans.md

@@ -47,6 +47,8 @@ These new multipliers will **only apply** if you remain on an annual {% data var
 
 Model multipliers and costs are subject to change.
 
+{% data reusables.copilot.gpt-55-promo-period %}
+
 | Model | Current multiplier | New multiplier |
 | --- | ---: | ---: |
 | {% for entry in tables.copilot.annual-subscriber-model-multipliers %} |

data/tables/copilot/annual-subscriber-model-multipliers.yml

@@ -98,6 +98,10 @@
   current_multiplier: '0.33'
   new_multiplier: '6'
 
+- model: 'GPT-5.5'
+  current_multiplier: '7.5'
+  new_multiplier: 'TBD'
+
 - model: 'GPT-5 mini'
   current_multiplier: '0'
   new_multiplier: '0.33'