fix: correct gpt-5.1-codex-max pricing to match codex

Same pricing as gpt-5.1-codex: $1.25/M input, $10/M output
Also aligned max token limits with the codex model.

Change-Id: I030014df05a5ccae62f5c93d7435ec2363d23317
Signed-off-by: Thomas Kosiewski <tk@coder.com>

Author: ThomasK33

src/common/utils/tokens/models-extra.ts

@@ -90,20 +90,19 @@ export const modelsExtra: Record<string, ModelData> = {
   },
 
   // GPT-5.1-Codex-Max - Extended reasoning model with xhigh support
-  // Pricing TBD - using estimated values based on Codex pricing pattern
+  // Same pricing as gpt-5.1-codex: $1.25/M input, $10/M output
   // Supports 5 reasoning levels: off, low, medium, high, xhigh
   "gpt-5.1-codex-max": {
-    max_input_tokens: 400000, // Estimated based on compaction capability
-    max_output_tokens: 272000, // Same as gpt-5-pro
-    input_cost_per_token: 0.00002, // $20/M - placeholder estimate
-    output_cost_per_token: 0.00008, // $80/M - placeholder estimate
+    max_input_tokens: 272000, // Same as gpt-5.1-codex
+    max_output_tokens: 128000, // Same as gpt-5.1-codex
+    input_cost_per_token: 0.00000125, // $1.25 per million input tokens
+    output_cost_per_token: 0.00001, // $10 per million output tokens
     litellm_provider: "openai",
     mode: "chat",
     supports_function_calling: true,
     supports_vision: true,
     supports_reasoning: true,
     supports_response_schema: true,
-    knowledge_cutoff: "2025-06-30", // Estimated
     supported_endpoints: ["/v1/responses"],
   },
 };