OpenAI API pricing
OpenAI API pricing: current per-token rates
OpenAI's current API rates per 1M tokens, input / output / cached-read, verified 2026-10-15. Every rate links to its official source.
Current OpenAI model prices
| Model | Input ($/1M) | Output ($/1M) | Cached in ($/1M) | Context |
|---|---|---|---|---|
| GPT-5.4 | $2.50 | $15 | $0.25 | 1.1M |
| GPT-5.5 | $5 | $30 | $0.50 | 1.1M |
| GPT-5.6 Luna | $0.20 | $1.20 | $0.02 | 1.1M |
| GPT-5.6 Luna Pro | $0.20 | $1.20 | $0.02 | 1.1M |
| GPT-5.6 Sol | $4 | $20 | $0.40 | 1.1M |
| GPT-5.6 Terra | $2 | $12 | $0.20 | 1.1M |
| GPT-6 Astra | $10 | $50 | $1 | 1.1M |
| GPT-6 Luna | $0.10 | $0.50 | $0.01 | 1.1M |
| gpt-oss-120b | $0.15 | $0.60 | $0.07 | 131K |
| gpt-oss-20b | $0.02 | $0.09 | $0.01 | 131K |
Non-official data by OpenRouter (passthrough pricing — the provider’s own rate, no markup); verify against the provider's own page before relying on it.
Recent price changes
- GPT-5.6 Sol: $2/$10 → $4/$20 per 1M (effective 2026-10-15)
- gpt-oss-120b: $0.04/$0.17 → $0.15/$0.60 per 1M (effective 2026-10-15)
- gpt-oss-20b: $0.03/$0.13 → $0.02/$0.09 per 1M (effective 2026-09-29)
- GPT-5.6 Luna: $1/$6 → $0.20/$1.20 per 1M (effective 2026-09-24)
- GPT-5.6 Luna Pro: $0.10/$0.60 → $0.20/$1.20 per 1M (effective 2026-09-24)
- GPT-5.6 Terra: $1/$6 → $2/$12 per 1M (effective 2026-09-24)
Common questions
Can I use the OpenAI API for free?
No — API access is metered per token at the rates above. Subscriptions (where offered) bundle usage into a flat monthly price; the API itself is pay-as-you-go.
Which model is cheapest?
The lowest input/output rate in the table above for light work; match the model to the task rather than defaulting to the cheapest — routing the hard steps up and the cheap steps down usually beats a single choice.
Prices change. Verified 2026-10-15 — re-check the source before relying on them. Corrections: hello@aiarch.dev.
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