# pip install tiktoken
import tiktoken
 
enc = tiktoken.encoding_for_model("gpt-4o")
 
texts = {
    "EN (kısa)":  "Hello, how can I help you today?",
    "TR (kısa)":  "Merhaba, sana bugün nasıl yardımcı olabilirim?",
    "EN (uzun)":  "The quick brown fox jumps over the lazy dog. " * 10,
    "TR (uzun)":  "Hızlı kahverengi tilki tembel köpeğin üzerinden atlar. " * 10,
}
 
for label, t in texts.items():
    tokens = enc.encode(t)
    print(f"{label:14s} | {len(t):4d} karakter | {len(tokens):4d} token | {len(t)/len(tokens):.2f} char/token")
 

# Senaryo: Türkiye'de production LLM uygulaması cost modeli
 
USD_TO_TRY = 33.5  # Ocak 2026 kuru
 
# Sistem yapısı
SYSTEM_PROMPT_TOKENS = 500
TOOL_DEFINITIONS_TOKENS = 1500
DOCUMENT_CONTEXT_TOKENS = 50_000
USER_QUERY_TOKENS_AVG = 100
OUTPUT_TOKENS_AVG = 500
 
# Trafik
REQUESTS_PER_MONTH = 100_000
CACHE_HIT_RATIO = 0.95  # ilk istek miss, gerisi hit
 
# Claude Sonnet 4.6 fiyatları ($/1M token)
INPUT_PRICE = 3.00
OUTPUT_PRICE = 15.00
CACHE_WRITE_PRICE = 3.75
CACHE_READ_PRICE = 0.30
 
# --- Cache YOK senaryosu ---
total_input = (SYSTEM_PROMPT_TOKENS + TOOL_DEFINITIONS_TOKENS +
               DOCUMENT_CONTEXT_TOKENS + USER_QUERY_TOKENS_AVG)
cost_no_cache_usd = (
    REQUESTS_PER_MONTH * (
        total_input / 1_000_000 * INPUT_PRICE +
        OUTPUT_TOKENS_AVG / 1_000_000 * OUTPUT_PRICE
    )
)
 
# --- Cache AÇIK senaryosu ---
cacheable_tokens = SYSTEM_PROMPT_TOKENS + TOOL_DEFINITIONS_TOKENS + DOCUMENT_CONTEXT_TOKENS
dynamic_tokens = USER_QUERY_TOKENS_AVG
 
misses = REQUESTS_PER_MONTH * (1 - CACHE_HIT_RATIO)
hits = REQUESTS_PER_MONTH * CACHE_HIT_RATIO
 
cost_with_cache_usd = (
    misses * (
        cacheable_tokens / 1_000_000 * CACHE_WRITE_PRICE +
        dynamic_tokens / 1_000_000 * INPUT_PRICE +
        OUTPUT_TOKENS_AVG / 1_000_000 * OUTPUT_PRICE
    )
    + hits * (
        cacheable_tokens / 1_000_000 * CACHE_READ_PRICE +
        dynamic_tokens / 1_000_000 * INPUT_PRICE +
        OUTPUT_TOKENS_AVG / 1_000_000 * OUTPUT_PRICE
    )
)
 
# --- Rapor ---
print(f"Aylık {REQUESTS_PER_MONTH:,} istek senaryosu:")
print(f"")
print(f"  Cache YOK:   ${cost_no_cache_usd:>10,.2f}  |  {cost_no_cache_usd * USD_TO_TRY:>12,.2f} TL")
print(f"  Cache AÇIK:  ${cost_with_cache_usd:>10,.2f}  |  {cost_with_cache_usd * USD_TO_TRY:>12,.2f} TL")
print(f"")
savings = cost_no_cache_usd - cost_with_cache_usd
savings_pct = savings / cost_no_cache_usd * 100
print(f"  TASARRUF:    ${savings:>10,.2f}  |  {savings * USD_TO_TRY:>12,.2f} TL  ({savings_pct:.1f}%)")
print(f"  Yıllık:                          {savings * USD_TO_TRY * 12:>12,.2f} TL")