v3.25.2

Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Jul. 31, 2025	Apr. 30, 2024	Apr. 30, 2025
Number of Stock Options Outstanding
Balance at beginning of period (in shares)	28,477
Options granted (in shares)	55
Options exercised (in shares)	(267)
Options cancelled (in shares)	(49)
Balance at end of period (in shares)	28,216
Vested and exercisable at end of period (in shares)	24,619
Vested and expected to vest at end of period (in shares)	28,216
Weighted Average Exercise Price
Balance at beginning of period (in dollars per share)	$ 15.13
Options granted (in dollars per share)	24.72
Options exercised (in dollars per share)	4.85
Options cancelled (in dollars per share)	36.95
Balance at end of period (in dollars per share)	15.21
Vested and exercisable at end of period (in dollars per share)	12.92
Vested and expected to vest at end of period (in dollars per share)	$ 15.21
Weighted Average Remaining Contractual Life (years)
Balance at beginning of period	4 years 9 months 14 days	5 years 3 days
Balance at end of period	4 years 9 months 14 days	5 years 3 days
Vested and exercisable at end of period	4 years 4 months 28 days
Vested and expected to vest at end of period	4 years 9 months 14 days
Aggregate Intrinsic Value
Balance at beginning of period	$ 235,602		$ 195,923
Balance at end of period	235,602		$ 195,923
Vested and exercisable at end of period	261,947
Vested and expected to vest at end of period	$ 235,602

Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract]

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Remaining Contractual Term [Abstract]

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share options (or share units) exercised during the current period.

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C3.ai, Inc. 10-Q