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from meshapi import (
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    BatchRequestItem,
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    CreateBatchParams,
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)
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# 1. Create the batch
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batch = client.batches.create(
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    CreateBatchParams(
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        requests=[
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            BatchRequestItem(
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                custom_id="req-1",
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                body={
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                    "model": "openai/gpt-5.4",
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                    "messages": [{"role": "user", "content": "Say hi."}],
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                },
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            ),
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            BatchRequestItem(
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                custom_id="req-2",
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                body={
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                    "model": "openai/gpt-5.4",
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                    "messages": [{"role": "user", "content": "Say bye."}],
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                },
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            ),
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        ],
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        completion_window="24h",
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    )
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)
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# 2. Poll later — results are included once status is "completed"
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status = client.batches.get(batch.id)
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if status.status == "completed":
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    for result in status.results or []:
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        print(result["custom_id"], result["response"]["body"]["choices"][0]["message"]["content"])