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Documentation Index

Fetch the complete documentation index at: https://docs.stealthgpt.ai/llms.txt

Use this file to discover all available pages before exploring further.

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Word-Based Pricing

StealthGPT API uses a free-to-start + pay-as-you-go model.

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Billing Model

  • Starter access: $0 to begin after activating API access and adding a payment method
  • Pay-as-you-go rate: After your included/prepaid words are used, usage is billed at $0.20 per 1,000 charged words across all endpoints.
  • Tiered billing thresholds: Your invoice threshold starts lower and can advance automatically as spend increases within a billing period.

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API Billing Tiers

StealthGPT API pay-as-you-go accounts start at Tier 1. Each tier sets an automatic invoice threshold, and your account can move to the next tier after reaching the required spend within the current billing cycle.
  • Tier 1 — Invoice threshold: $50. Spend to advance: $200 (to reach Tier 2).
  • Tier 2 — Invoice threshold: $250. Spend to advance: $1,000 (to reach Tier 3).
  • Tier 3 — Invoice threshold: $500. Spend to advance: $2,000 (to reach Tier 4).
  • Tier 4 — Invoice threshold: $1,000. Spend to advance: $4,000 (to reach Tier 5).
  • Tier 5 — Invoice threshold: $5,000. Highest tier (no automatic advancement).
Need custom tier settings, higher invoice thresholds, or tailored billing limits? Email joey@stealthgpt.ai and include your expected billing-cycle usage and required limits.

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Word Consumption Rates

StealthGPT charges by input words + output words for /api/stealthify. /api/stealthify/detect charges input words per request (one charged word per input word). /api/stealthify/articles is a flat 50,000 charged words per request. /api/stealthify/agent charges ceil(output words × 10) Stealth API words per successful request, where output words are counted from the primary markdown result.
Business mode has been removed and replaced by the Stealth Agent endpoint. The business field is still accepted in /api/stealthify request bodies for backward compatibility but is ignored: every request is billed at the standard rate regardless of the value sent.
For premium-quality, multi-step output that previously justified Business mode (academic essays, SEO long-form, platform-tuned social posts), use Stealth Agent. The × 10 multiplier on output words funds the full research → draft → optional fact-check → humanize → optional images pipeline.

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Rate Limits

StealthGPT API has the following rate limits to ensure optimal performance and fair usage:
  • 3,500 RPM (Requests Per Minute)
  • 350,000 WPM (Words Per Minute)

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How to Get Started

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Get Started

  1. Activate API access at stealthgpt.ai/stealthapi
  2. Add a payment method during activation (required before API access is enabled)
  3. Start using the API with free starter access; pay-as-you-go billing applies after starter/prepaid words are exhausted