Fix mini v2 model config names

Author: Muhtasham

.env.example

@@ -11,3 +11,6 @@ OPENAI_API_KEY=
 GEMINI_API_KEY=
 XAI_API_KEY=
 DASHSCOPE_API_KEY=
+
+# Optional: only needed for legacy configs that still set `model_class: portkey`.
+PORTKEY_API_KEY=

configs/examples/BattleSnake__claude-sonnet-4-5-20250929__o3__r5__s1000.yaml

@@ -13,7 +13,7 @@ players:
   config:
     agent: !include mini/default.yaml
     model:
-      model_name: '@anthropic/claude-sonnet-4-5-20250929'
+      model_name: 'anthropic/claude-sonnet-4-5-20250929'
       model_kwargs:
         temperature: 0.2
         max_tokens: 4096
@@ -22,7 +22,7 @@ players:
   config:
     agent: !include mini/default.yaml
     model:
-      model_name: '@openai/o3'
+      model_name: 'openai/o3'
 prompts:
   game_description: |-
     You are a software developer ({{player_id}}) competing in a coding game called BattleSnake.

configs/examples/CoreWar__claude-sonnet-4-5-20250929__o3__r5__s1000.yaml

@@ -10,7 +10,7 @@ players:
   config:
     agent: !include mini/default.yaml
     model:
-      model_name: '@anthropic/claude-sonnet-4-5-20250929'
+      model_name: 'anthropic/claude-sonnet-4-5-20250929'
       model_kwargs:
         temperature: 0.2
         max_tokens: 4096
@@ -19,7 +19,7 @@ players:
   config:
     agent: !include mini/default.yaml
     model:
-      model_name: '@openai/o3'
+      model_name: 'openai/o3'
 prompts:
   game_description: |-
     You are a software developer ({{player_id}}) competing in a coding game called CoreWar.

configs/examples/Halite__claude-sonnet-4-5-20250929__o3__r5__s250.yaml

@@ -10,7 +10,7 @@ players:
   config:
     agent: !include mini/default.yaml
     model:
-      model_name: '@anthropic/claude-sonnet-4-5-20250929'
+      model_name: 'anthropic/claude-sonnet-4-5-20250929'
       model_kwargs:
         temperature: 0.2
         max_tokens: 4096
@@ -19,7 +19,7 @@ players:
   config:
     agent: !include mini/default.yaml
     model:
-      model_name: '@openai/o3'
+      model_name: 'openai/o3'
 prompts:
   game_description: |-
     You are a software developer ({{player_id}}) competing in a coding game called Halite.

configs/examples/HuskyBench__claude-sonnet-4-5-20250929__o3__r5__s100.yaml

@@ -10,7 +10,7 @@ players:
   config:
     agent: !include mini/default.yaml
     model:
-      model_name: '@anthropic/claude-sonnet-4-5-20250929'
+      model_name: 'anthropic/claude-sonnet-4-5-20250929'
       model_kwargs:
         temperature: 0.2
         max_tokens: 4096
@@ -19,7 +19,7 @@ players:
   config:
     agent: !include mini/default.yaml
     model:
-      model_name: '@openai/o3'
+      model_name: 'openai/o3'
 prompts:
   game_description: |-
     You are a software developer ({{player_id}}) competing in a coding game called HuskyBench.

configs/examples/RoboCode__claude-sonnet-4-5-20250929__o3__r5__s250.yaml

@@ -13,7 +13,7 @@ players:
   config:
     agent: !include mini/default.yaml
     model:
-      model_name: '@anthropic/claude-sonnet-4-5-20250929'
+      model_name: 'anthropic/claude-sonnet-4-5-20250929'
       model_kwargs:
         temperature: 0.2
         max_tokens: 4096
@@ -22,7 +22,7 @@ players:
   config:
     agent: !include mini/default.yaml
     model:
-      model_name: '@openai/o3'
+      model_name: 'openai/o3'
 prompts:
   game_description: |-
     You are a software developer ({{player_id}}) competing in a coding game called RoboCode.

configs/examples/RobotRumble__claude-sonnet-4-5-20250929__o3__r5__s250.yaml

@@ -11,7 +11,7 @@ players:
   config:
     agent: !include mini/default.yaml
     model:
-      model_name: '@anthropic/claude-sonnet-4-5-20250929'
+      model_name: 'anthropic/claude-sonnet-4-5-20250929'
       model_kwargs:
         temperature: 0.2
         max_tokens: 4096
@@ -20,7 +20,7 @@ players:
   config:
     agent: !include mini/default.yaml
     model:
-      model_name: '@openai/o3'
+      model_name: 'openai/o3'
 prompts:
   game_description: |-
     You are a software developer ({{player_id}}) competing in a coding game called RobotRumble.

configs/models.yaml

@@ -16,7 +16,7 @@
 - model_name: xai/grok-code-fast-1
   model_kwargs:
     temperature: 0.2
-- model_name: google/gemini-2.5-pro
+- model_name: gemini/gemini-2.5-pro
   model_kwargs:
     temperature: 0.2
 - model_name: openai/gpt-5