OpenAI API pricing
The GPT-6 family — Astra for the hardest end-to-end work, Sol for complex coding and agentic workflows, and Luna for efficient high-volume tasks.
OpenAI models — price per 1M tokens
All prices in USD. Catalog updated 2026-10-07; model pages show the source-specific verification date. Cheapest reference cost first.
| Model | Input /1M | Output /1M | Cost / call* | Context | Type |
|---|---|---|---|---|---|
| GPT-6 Luna Efficient model for focused, high-volume tasks · >272K input uses long-context rates | $0.100 | $0.500 | $0.0006 | 1.05M | Fast / cheap |
| GPT-5.6 Luna Cost-sensitive, high-volume tier | $0.200 | $1.20 | $0.0014 | 1.05M | Balanced |
| GPT-5.4 nano Cheapest OpenAI tier | $0.200 | $1.25 | $0.0015 | 400K | Fast / cheap |
| GPT-5.4 mini | $0.750 | $4.50 | $0.0053 | 400K | Balanced |
| GPT-6.1 Sol Sol 6.1 · $0.10 cache reads · >272K input uses long-context rates | $2.00 | $10.00 | $0.012 | 1.05M | Flagship |
| GPT-6 Sol Complex coding and agentic workflows · >272K input uses long-context rates | $2.00 | $10.00 | $0.012 | 1.05M | Flagship |
| GPT-5.6 Terra Balances intelligence and cost | $2.00 | $12.00 | $0.014 | 1.05M | Flagship |
| GPT-5.4 Balanced flagship | $2.50 | $15.00 | $0.017 | 400K | Flagship |
| GPT-5.6 Sol Flagship for complex professional work | $4.00 | $20.00 | $0.024 | 1.05M | Flagship |
| GPT-5.5 Flagship | $5.00 | $30.00 | $0.035 | 400K | Flagship |
| GPT-6 Astra Also called GPT-6 or Astra · >272K input uses long-context rates | $10.00 | $50.00 | $0.060 | 1.05M | Flagship |
*Reference cost of one call with 1,000 input + 1,000 output tokens — a neutral yardstick. Use the calculator for your real usage. Cheapest row highlighted.
OpenAI usage tiers: Build, Launch and Grow
Announced 2026-10-06 · verified 2026-10-07
OpenAI replaced five paid usage tiers with three. Organizations upgrade automatically when cumulative credit purchases meet these thresholds. These are lifetime purchase thresholds, not monthly subscription fees.
| Paid tier | Total credit purchases | Monthly usage limit |
|---|---|---|
| Build | $5 | $500 |
| Launch | $100 | $5,000 |
| Grow | $500 | $200,000 |
Grow lowers the highest-tier qualification from $1,000 to $500. Paid organizations migrate automatically. The change expands calling capacity; it does not reduce model token prices.
Published Standard rate limits
| Tier | Astra / Sol / Terra RPM | Astra / Sol / Terra TPM | Luna RPM | Luna TPM |
|---|---|---|---|---|
| Build | 5,000 | 1,000,000 | 5,000 | 2,000,000 |
| Launch | 10,000 | 4,000,000 | 10,000 | 10,000,000 |
| Grow | 15,000 | 40,000,000 | 30,000 | 180,000,000 |
RPM = requests per minute; TPM = tokens per minute. These are the guide's Standard model limits, separate from Ultrafast limits and endpoint-specific constraints. Check your organization's Limits settings for applicable limits. Usage limits are also separate from configured spend alerts and hard spend caps.
Sources: OpenAI rate-limit guide · October 6 changelog · Official tier-change announcement.
Decisions API pricing · public beta
GPT-6 Luna via /v1/decisions costs $0.10 per million input tokens, with no output or cache charges. Long-context and regional processing adjustments still apply. OpenAI reports up to 10× faster decisions than Luna through Responses.
Decisions price table, billing exceptions and examples → · Official documentation
How OpenAI API pricing works
OpenAI bills per token: an input price for everything you send and a higher output price for what the model generates, both quoted per million tokens. To estimate a real bill, multiply by your monthly request volume — the cost calculator does this across every model at once.
Before committing to volume, always confirm the current numbers on the official OpenAI pricing page — the list prices here are verified periodically but the market moves fast.