Merge pull request #32 from charmbracelet/gpt5

feat: add gpt-5

Author: kujtimiihoxha

internal/providers/configs/openai.json

@@ -4,9 +4,51 @@
   "type": "openai",
   "api_key": "$OPENAI_API_KEY",
   "api_endpoint": "$OPENAI_API_ENDPOINT",
-  "default_large_model_id": "o4-mini",
+  "default_large_model_id": "gpt-5",
   "default_small_model_id": "gpt-4o",
   "models": [
+    {
+      "id": "gpt-5",
+      "name": "GPT-5",
+      "cost_per_1m_in": 1.25,
+      "cost_per_1m_out": 10,
+      "cost_per_1m_in_cached": 0.25,
+      "cost_per_1m_out_cached": 0.25,
+      "context_window": 400000,
+      "default_max_tokens": 128000,
+      "can_reason": true,
+      "has_reasoning_effort": true,
+      "default_reasoning_effort": "minimal",
+      "supports_attachments": true
+    },
+    {
+      "id": "gpt-5-mini",
+      "name": "GPT-5 Mini",
+      "cost_per_1m_in": 0.25,
+      "cost_per_1m_out": 2,
+      "cost_per_1m_in_cached": 0.025,
+      "cost_per_1m_out_cached": 0.025,
+      "context_window": 400000,
+      "default_max_tokens": 128000,
+      "can_reason": true,
+      "has_reasoning_effort": true,
+      "default_reasoning_effort": "low",
+      "supports_attachments": true
+    },
+    {
+      "id": "gpt-5-nano",
+      "name": "GPT-5 Nano",
+      "cost_per_1m_in": 0.05,
+      "cost_per_1m_out": 0.4,
+      "cost_per_1m_in_cached": 0.005,
+      "cost_per_1m_out_cached": 0.005,
+      "context_window": 400000,
+      "default_max_tokens": 128000,
+      "can_reason": true,
+      "has_reasoning_effort": true,
+      "default_reasoning_effort": "low",
+      "supports_attachments": true
+    },
     {
       "id": "o4-mini",
       "name": "o4 Mini",