LLM API cost calculator

Your workload, every model, one table. Prices are per million tokens, July 2026, synced with the KostLens price catalog (cache discounts and >200k long-context tiers exist too — the dashboard applies them automatically).

Model $ / call $ / day $ / month
This is list-price math on one workload. Your real bill has cache hits, streaming, retries, long prompts and ten different features mixed together — KostLens measures that automatically, per customer. Free up to 10k events/month.

Reference prices (USD per 1M tokens, July 2026)

openai

Model Input Output
gpt-5.6-sol $5.00 $30.00
gpt-5.6-terra $2.50 $15.00
gpt-5.6-luna $1.00 $6.00
gpt-5.5 $5.00 $30.00
gpt-5.4 $2.50 $15.00
gpt-4.1-nano $0.10 $0.40
gpt-4o-mini $0.15 $0.60

anthropic

Model Input Output
claude-fable-5 $10.00 $50.00
claude-opus-4-8 $5.00 $25.00
claude-sonnet-5 (intro) $2.00 $10.00
claude-haiku-4-5 $1.00 $5.00

Google (Gemini)

Model Input Output
gemini-3.5-flash $1.50 $9.00
gemini-3.1-pro $2.00 $12.00
gemini-3.1-flash-lite $0.25 $1.50
gemini-3-flash $0.50 $3.00
gemini-2.5-pro $1.25 $10.00
gemini-2.5-flash $0.30 $2.50
gemini-2.5-flash-lite $0.10 $0.40