# Estimating context usage
import tiktoken

enc = tiktoken.get_encoding("cl100k_base")

system_prompt = "You are a helpful assistant..."
conversation_history = [...]  # previous messages
new_message = "What is the capital of France?"

total_tokens = (
    len(enc.encode(system_prompt)) +
    sum(len(enc.encode(m["content"])) for m in conversation_history) +
    len(enc.encode(new_message))
)

print(f"Context usage: {total_tokens:,} / 128,000 tokens")
print(f"Cost estimate: ${total_tokens * 0.000005:.4f}")  # GPT-4o pricing

LLMs — Large Language Models, GPT, Claude

LLMs — Large Language Models, GPT, Claude

LLMs — Large Language Models, GPT, Claude