gpt-4o-2024-11-20

条件：Snapshot identifier is explicitly listed by the official model page; no release date is inferred from the identifier.

证据：OpenAI lists model ID gpt-4o, default snapshot gpt-4o-2024-08-06, 128,000 context, 16,384 max output, and text-token prices of $2.50 input, $1.25 cached input and $10 output per 1M tokens. Listed snapshots are gpt-4o-2024-11-20, gpt-4o-2024-08-06 and gpt-4o-2024-05-13.