OpenAI LLM API Cost Calculator
Compare what your prompts cost across every major LLM — with exact token counts for OpenAI models, right in your browser.
Prices verified 2026-07-11 · per 1M tokens · sources linked per provider
| Model | Cost / call | Cost / month | × best price |
|---|---|---|---|
| GPT-5.4 nanocheapest | $0.00145 | $1.45 | — |
| GPT-5.4 mini | $0.00525 | $5.25 | 3.6× |
| GPT-5.6 Luna | $0.007 | $7.00 | 4.8× |
| GPT-5.6 Terra | $0.0175 | $17.50 | 12.1× |
| GPT-5.6 Sol | $0.035 | $35.00 | 24.1× |
Token counter
0 tokens
Token counts are exact for OpenAI models (tiktoken o200k_base, run in your browser). For other providers the count is an estimate — notably Claude Opus 4.7+/Sonnet 5 and similar newer models use a tokenizer that produces roughly 30% more tokens for the same text.
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