GPT-6 Luna API pricing and agent cost
| Provider | OpenAI |
|---|---|
| Input | $0.1 / 1M tokens |
| Output | $0.5 / 1M tokens |
| Cached input | $0.01 / 1M tokens |
Prompts with more than 272K input tokens are priced at 2x input and cache rates and 1.5x output for the full request (OpenAI model page). Derived long-context rate: $0.20 in / $0.02 cached / $0.75 out.
Source: https://developers.openai.com/api/docs/pricing (checked 2026-10-25)
Example agent cost
An agent making 5 tool calls per task, with 3,000 input and 800 output tokens per call, running 100 tasks a day costs about $0.0035 per task, $0.3500 per day, and $10.50 per month on GPT-6 Luna.
Not sure your numbers are right? Get a $9 AI Agent Cost Audit
Most agent bills are dominated by context re-sent on every tool call, retries and output length, which a quick estimate misses. Send us your setup and get a written breakdown per task, day and month, cheaper model options and specific savings ideas within 48 hours.
Get my audit: $9 See a sample report
One-time $9 via Stripe Checkout. Nothing recurring. Prices from official provider pages.
Get the TokenTab newsletter
Model price changes and agent cost tips, straight to your inbox. Unsubscribe anytime; we only use your email for this newsletter.
Sponsor this tool
Reach AI builders, agent developers and vibe coders who are choosing models and platforms. See sponsor options or email tokentab+sponsors@mail.grokbot.com.