What the reliable flag means
2026-01-12 · Captchas
You are charged only when reliable is true. Otherwise refresh and solve a new image.
Each response has a confidence score and reliable. The boolean is what you should branch on. Confidence is there so you can log it.
reliable: true spends one credit. reliable: false returns that credit before the response is finished. You may still see a text value. Do not submit it to the portal.
The cutoff depends on the engine: 0.8 for text, 0.7 for arithmetic, 0.5 for Hindi-number captchas. You cannot set the cutoff on the request.
error set to invalid_image, timeout, model_unavailable, or internal_error is also free. Those are not low-confidence reads. The image was skipped or the call failed.
Ready to call it? Start with the quickstart, the API guide, or pricing.