xAI retired the grok-imagine-image-quality and grok-imagine-image-pro endpoints; requests to them are now served by grok-imagine-image-2.0-low (grok-imagine-image-2.0 with quality set to low) at a lower per-image price. No request changes are needed, and usage.cost_in_usd_ticks reflects the lower price, with gRPC/xAI SDK responses reporting the new model name.
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What to doNo code changes are required, but check the migration guide and note that responses now report grok-imagine-image-2.0-low as the model.