docs: update Qodo Merge model configuration with new model names and December 2025 defaults

Author: ofir-frd

docs/docs/usage-guide/qodo_merge_models.md

@@ -1,41 +1,56 @@
 
-The default models used by Qodo Merge 💎 (October 2025) are a combination of GPT-5, Haiku-4.5, and Gemini 2.5 Pro.
+The default models used by Qodo Merge 💎 (December 2025) are a combination of GPT-5, Haiku-4.5, and Gemini 2.5 Pro.
 
 ### Selecting a Specific Model
 
 Users can configure Qodo Merge to use only a specific model by editing the [configuration](https://qodo-merge-docs.qodo.ai/usage-guide/configuration_options/) file.
 The models supported by Qodo Merge are:
 
-- `gpt-5`
-- `claude-haiku-4.5`
-- `gemini-2.5-pro`
-- `o4-mini`
-- `deepseek/r1`
+- `anthropic/claude-haiku-4-5-20251001`
+- `anthropic/claude-sonnet-4-5-20250929`
+- `vertex_ai/gemini-2.5-pro`
+- `vertex_ai/gemini-3-pro-preview`
+- `gpt-5-2025-08-07`
+- `gpt-5.2-2025-12-11`
 
-To restrict Qodo Merge to using only `o4-mini`, add this setting:
+To restrict Qodo Merge to using `anthropic/claude-haiku-4-5-20251001`:
 
 ```toml
 [config]
-model="o4-mini"
+model="anthropic/claude-haiku-4-5-20251001"
 ```
 
-To restrict Qodo Merge to using only `GPT-5`, add this setting:
+To restrict Qodo Merge to using `anthropic/claude-sonnet-4-5-20250929`:
 
 ```toml
 [config]
-model="gpt-5"
+model="anthropic/claude-sonnet-4-5-20250929"
 ```
 
-To restrict Qodo Merge to using only `gemini-2.5-pro`, add this setting:
+To restrict Qodo Merge to using `vertex_ai/gemini-2.5-pro`:
 
 ```toml
 [config]
-model="gemini-2.5-pro"
+model="vertex_ai/gemini-2.5-pro"
 ```
 
-To restrict Qodo Merge to using only `claude-4-sonnet`, add this setting:
+To restrict Qodo Merge to using `vertex_ai/gemini-3-pro-preview`:
 
 ```toml
 [config]
-model="claude-4-sonnet"
+model="vertex_ai/gemini-3-pro-preview"
+```
+
+To restrict Qodo Merge to using `gpt-5-2025-08-07`:
+
+```toml
+[config]
+model="gpt-5-2025-08-07"
+```
+
+To restrict Qodo Merge to using `gpt-5.2-2025-12-11`:
+
+```toml
+[config]
+model="gpt-5.2-2025-12-11"
 ```