Documentation 2026-09-22 23:58 UTC to 2026-09-23 23:59 UTC

41| grok-4.20-0309-non-reasoning | T0: 37, T1: 50, T2: 75, T3: 125, T4: 208 | T0: 10M, T1: 15M, T2: 25M, T3: 45M, T4: 85M |41| grok-4.20-0309-non-reasoning | T0: 37, T1: 50, T2: 75, T3: 125, T4: 208 | T0: 10M, T1: 15M, T2: 25M, T3: 45M, T4: 85M |

42| grok-build-0.1 | T0: 37, T1: 50, T2: 75, T3: 125, T4: 208 | T0: 10M, T1: 15M, T2: 25M, T3: 45M, T4: 85M |42| grok-build-0.1 | T0: 37, T1: 50, T2: 75, T3: 125, T4: 208 | T0: 10M, T1: 15M, T2: 25M, T3: 45M, T4: 85M |

43| grok-4.20-multi-agent-0309 | T0: 9, T1: 12, T2: 18, T3: 31, T4: 56 | T0: 2.5M, T1: 3.7M, T2: 6.2M, T3: 11M, T4: 21M |43| grok-4.20-multi-agent-0309 | T0: 9, T1: 12, T2: 18, T3: 31, T4: 56 | T0: 2.5M, T1: 3.7M, T2: 6.2M, T3: 11M, T4: 21M |

44| grok-imagine-image-2.0 | T0: 6, T1: 12, T2: 25, T3: 50, T4: 100 | — |

45| grok-imagine-image | T0: 6, T1: 12, T2: 25, T3: 50, T4: 100 | — |44| grok-imagine-image | T0: 6, T1: 12, T2: 25, T3: 50, T4: 100 | — |

46| grok-imagine-image-quality | T0: 6, T1: 12, T2: 25, T3: 50, T4: 100 | — |45| grok-imagine-image-quality | T0: 6, T1: 12, T2: 25, T3: 50, T4: 100 | — |

47| grok-imagine-video | T0: 10, T1: 20, T2: 39, T3: 79, T4: 158 | — |46| grok-imagine-image-2.0 | T0: 6, T1: 12, T2: 25, T3: 50, T4: 100 | — |

48| grok-imagine-video-1.5 | T0: 10, T1: 20, T2: 39, T3: 79, T4: 158 | — |47| grok-imagine-video-1.5 | T0: 10, T1: 20, T2: 39, T3: 79, T4: 158 | — |

48| grok-imagine-video | T0: 10, T1: 20, T2: 39, T3: 79, T4: 158 | — |

49 49 

50**Voice & Audio**50**Voice & Audio**

51 51 

65 65 

66* `seed` (integer | null) — If specified, our system will make a best effort to sample deterministically, such that repeated requests with the same \`seed\` and parameters should return the same result. Determinism is not guaranteed, and you should refer to the \`system\_fingerprint\` response parameter to monitor changes in the backend.66* `seed` (integer | null) — If specified, our system will make a best effort to sample deterministically, such that repeated requests with the same \`seed\` and parameters should return the same result. Determinism is not guaranteed, and you should refer to the \`system\_fingerprint\` response parameter to monitor changes in the backend.

67 67 

68* `service_tier` ("default" | "priority")68* `service_tier` ("default" | "priority" | "fast")

69 69 

70* `stop` (array | null) — (Not supported by reasoning models) Up to 4 sequences where the API will stop generating further tokens.70* `stop` (array | null) — (Not supported by reasoning models) Up to 4 sequences where the API will stop generating further tokens.

71 71 

132* `output_files` (array | null) — Files generated during the response (e.g., by the code execution tool).132* `output_files` (array | null) — Files generated during the response (e.g., by the code execution tool).

133 Only populated when \`code\_execution\_files\_output\` is included.133 Only populated when \`code\_execution\_files\_output\` is included.

134 134 

135* `service_tier` ("default" | "priority", required) — Processing tier for a request. Determines scheduling priority and billing.135* `service_tier` ("default" | "priority" | "fast", required) — Processing tier for a request. \`Fast\` and \`Priority\` are interchangeable: the model's fast

136 deployment and its rates where configured, else higher scheduling priority at a higher price.

136 137 

137* `system_fingerprint` (string | null) — System fingerprint, used to indicate xAI system configuration changes.138* `system_fingerprint` (string | null) — System fingerprint, used to indicate xAI system configuration changes.

138 139 

299* `output_files` (array | null) — Files generated during the response (e.g., by the code execution tool).300* `output_files` (array | null) — Files generated during the response (e.g., by the code execution tool).

300 Only populated when \`code\_execution\_files\_output\` is included.301 Only populated when \`code\_execution\_files\_output\` is included.

301 302 

302* `service_tier` ("default" | "priority", required) — Processing tier for a request. Determines scheduling priority and billing.303* `service_tier` ("default" | "priority" | "fast", required) — Processing tier for a request. \`Fast\` and \`Priority\` are interchangeable: the model's fast

304 deployment and its rates where configured, else higher scheduling priority at a higher price.

303 305 

304* `system_fingerprint` (string | null) — System fingerprint, used to indicate xAI system configuration changes.306* `system_fingerprint` (string | null) — System fingerprint, used to indicate xAI system configuration changes.

305 307 

77 * `to_date` (string | null) — Date up to which to consider the results in ISO-8601 YYYY-MM-DD. See77 * `to_date` (string | null) — Date up to which to consider the results in ISO-8601 YYYY-MM-DD. See

78 \<https://en.wikipedia.org/wiki/ISO\_8601>.78 \<https://en.wikipedia.org/wiki/ISO\_8601>.

79 79 

80* `service_tier` ("default" | "priority")80* `service_tier` ("default" | "priority" | "fast")

81 81 

82* `store` (boolean | null) — Whether to store the input message(s) and model response for later retrieval.82* `store` (boolean | null) — Whether to store the input message(s) and model response for later retrieval.

83 83 

153 153 

154* `safety_identifier` (string | null) — A stable identifier used to help detect users of your application that may be violating xAI's usage policies.154* `safety_identifier` (string | null) — A stable identifier used to help detect users of your application that may be violating xAI's usage policies.

155 155 

156* `service_tier` ("default" | "priority", required)156* `service_tier` ("default" | "priority" | "fast", required)

157 157 

158* `status` (string, required) — Status of the response. One of \`completed\`, \`in\_progress\` or \`incomplete\`.158* `status` (string, required) — Status of the response. One of \`completed\`, \`in\_progress\` or \`incomplete\`.

159 159 

413 413 

414* `safety_identifier` (string | null) — A stable identifier used to help detect users of your application that may be violating xAI's usage policies.414* `safety_identifier` (string | null) — A stable identifier used to help detect users of your application that may be violating xAI's usage policies.

415 415 

416* `service_tier` ("default" | "priority", required)416* `service_tier` ("default" | "priority" | "fast", required)

417 417 

418* `status` (string, required) — Status of the response. One of \`completed\`, \`in\_progress\` or \`incomplete\`.418* `status` (string, required) — Status of the response. One of \`completed\`, \`in\_progress\` or \`incomplete\`.

419 419