Hard facts side by side: free tiers, prices, limits, SDKs and privacy. Every value links to the official page it came from and is re-checked every week.
| Fact |  Stability AI |
|---|---|
| Free tier | 25 free credits New accounts created with Google login get 25 free credits, enough for 8 Stable Image Core images. Source, Nov 9, 2026 |
| Starting price | $0.03 per Core image Credits cost $1 per 100 (1 credit = $0.01). Stable Image Core is 3 credits; Ultra is 8 credits. Source, Nov 9, 2026 |
| Rate limit | 150 requests per 10 seconds Going over returns 429 and blocks requests for 60 seconds. Higher limits by contacting support. Source, Nov 9, 2026 |
| Storage | Async results kept 24 hours Results of async jobs (like Creative Upscale) are stored for 24 hours and fetched with the same API key. Source, Nov 9, 2026 |
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