diff --git a/openapi.yaml b/openapi.yaml
index 1fc5f4a..6f53452 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -7789,6 +7789,7 @@ components:
         - GRPO_LOSS_AGGREGATION_TYPE_UNSPECIFIED
         - GRPO_LOSS_AGGREGATION_TYPE_FIXED_HORIZON
         - GRPO_LOSS_AGGREGATION_TYPE_TOKEN_MEAN
+        - GRPO_LOSS_AGGREGATION_TYPE_SEQUENCE_MEAN
       default: GRPO_LOSS_AGGREGATION_TYPE_UNSPECIFIED
     RL.LossConfig:
       type: object
@@ -7900,12 +7901,14 @@ components:
       properties:
         target_tokens:
           $ref: '#/components/schemas/RL.LossTargetTokens'
-          description: Target tokens for loss computation (optional, defaults to shifted input_ids)
+          description: Target tokens for loss computation
         loss_mask:
           $ref: '#/components/schemas/RL.LossMask'
           description: Per-token loss mask (1=compute loss, 0=ignore)
         grpo_inputs:
           $ref: '#/components/schemas/RL.GRPOLossInputs'
+      required:
+        - target_tokens
     RL.TrainingSample:
       type: object
       required: