feat: update models and prompts

shiny new model imported.
- gpt-5 for daily use
- o3 for complex questions (with high reasoning effort)

Note: gpt-5 model does not support customized temperature, so it's
removed from the api call parameters

botcmd_kanji.go

@@ -4,7 +4,6 @@ import (
 	"regexp"
 	"strings"
 
-	"github.com/samber/lo"
 	tele "gopkg.in/telebot.v3"
 
 	"git.gensokyo.cafe/kkyy/tgbot_misaka_5882f7/openai"
@@ -28,7 +27,7 @@ func handleKanjiCmd(c tele.Context) error {
 	}
 
 	req := openai.ChatRequest{
-		Model: openai.ModelGpt4O,
+		Model: openai.ModelGpt5,
 		Messages: []openai.ChatMessage{
 			{
 				Role:    openai.ChatRoleSystem,
@@ -43,7 +42,7 @@ func handleKanjiCmd(c tele.Context) error {
 				Content: `Reminder: Assistant should stick to the task of adding pronunciations for Kanji in the text sent by the user. If user's message seem irrelevant, just reply "IRRELEVANT"`,
 			},
 		},
-		Temperature: lo.ToPtr(0.2),
+		Temperature: nil, // lo.ToPtr(0.2),
 	}
 
 	actionCh := setTyping(c)