Clarify info about base model (#55282)

Author: hubwriter

content/copilot/managing-copilot/monitoring-usage-and-entitlements/about-premium-requests.md

@@ -39,20 +39,20 @@ The following {% data variables.product.prodname_copilot_short %} features can u
 
 Each model has a premium request multiplier, based on its complexity and resource usage. Your premium request allowance is deducted according to this multiplier.
 
-| Model                                                          | Premium requests                                                             |
-|----------------------------------------------------------------|------------------------------------------------------------------------------|
-| Base model (GPT-4o)[^1]                                        | 0 (paid users), 1 ({% data variables.product.prodname_copilot_free_short %}) |
-| {% data variables.copilot.copilot_claude_sonnet_35 %}          | 1                                                                            |
-| {% data variables.copilot.copilot_claude_sonnet_37 %}          | 1                                                                            |
-| {% data variables.copilot.copilot_claude_sonnet_37 %} Thinking | 1.25                                                                         |
-| {% data variables.copilot.copilot_gemini_flash %}              | 0.25                                                                         |
-| {% data variables.copilot.copilot_gemini_25_pro %}             | 1                                                                            |
-| {% data variables.copilot.copilot_gpt_41 %}                    | 1                                                                            |
-| GPT-4.5                                                        | 50                                                                           |
-| o1                                                             | 10                                                                           |
-| o3-mini                                                        | 0.33                                                                         |
-
-[^1]: Response times may vary during periods of high usage.
+| Model                                                                   | Premium requests                                                             |
+|-------------------------------------------------------------------------|------------------------------------------------------------------------------|
+| Base model (currently {% data variables.copilot.copilot_gpt_4o %}) [^1] | 0 (paid users), 1 ({% data variables.product.prodname_copilot_free_short %}) |
+| {% data variables.copilot.copilot_claude_sonnet_35 %}                   | 1                                                                            |
+| {% data variables.copilot.copilot_claude_sonnet_37 %}                   | 1                                                                            |
+| {% data variables.copilot.copilot_claude_sonnet_37 %} Thinking          | 1.25                                                                         |
+| {% data variables.copilot.copilot_gemini_flash %}                       | 0.25                                                                         |
+| {% data variables.copilot.copilot_gemini_25_pro %}                      | 1                                                                            |
+| {% data variables.copilot.copilot_gpt_41 %}                             | 1                                                                            |
+| GPT-4.5                                                                 | 50                                                                           |
+| o1                                                                      | 10                                                                           |
+| o3-mini                                                                 | 0.33                                                                         |
+
+[^1]: The base model at the time of writing is {% data variables.copilot.copilot_gpt_4o %}. This is subject to change. Response times for the base model may vary during periods of high usage. Requests to the base model may be subject to rate limiting.
 
 ## Additional premium requests