Example of chunk stream in Bruno (like Postman, Insomnia).

My POST request:

{
  "model": "gemini-2.5-flash,
  "messages": [
    {
      "role": "user",
      "content": "Была 1 кошка пришел мальчик стало 3 кошки сколько денег ТЕПЕРЬ у кошки? Тщательно подумай перед ответом. ТЩАТЕЛЬНО думай."
    }
  ],
  "stream": true
}


Chunks output from Bruno:

data: {"id": "chatcmpl-c80f917c-63b1-4141-9945-bcc8087dfcea", "object": "chat.completion.chunk", "created": 1761168653, "model": "gemini-2.5-flash", "choices": [{"index": 0, "delta": {"content": "", "role": "assistant", "reasoning": "\n", "reasoning_details": [{"type": "reasoning.text", "text": "\n", "format": "unknown", "index": 0}]}, "finish_reason": null, "logprobs": null, "matched_stop": null}], "usage": null}

data: {"id": "chatcmpl-c80f917c-63b1-4141-9945-bcc8087dfcea", "object": "chat.completion.chunk", "created": 1761168653, "model": "gemini-2.5-flash", "choices": [{"index": 0, "delta": {"content": "", "role": "assistant", "reasoning": "**Calculating the Deduction**\n\nI've carefully dissected the Russian text, noting the initial state (one cat) and the final state (three cats). The boy's arrival caused a change. Now, to determine the \"zero\" answer, I must identify what the question is asking, which presently involves an unknown amount of money. I'm focusing on the implied action to determine how to arrive at a solution.\n\n\n", "reasoning_details": [{"type": "reasoning.text", "text": "**Calculating the Deduction**\n\nI've carefully dissected the Russian text, noting the initial state (one cat) and the final state (three cats). The boy's arrival caused a change. Now, to determine the \"zero\" answer, I must identify what the question is asking, which presently involves an unknown amount of money. I'm focusing on the implied action to determine how to arrive at a solution.\n\n\n", "format": "unknown", "index": 0}]}, "finish_reason": null, "logprobs": null, "matched_stop": null}], "usage": null}

data: {"id": "chatcmpl-c80f917c-63b1-4141-9945-bcc8087dfcea", "object": "chat.completion.chunk", "created": 1761168653, "model": "gemini-2.5-flash", "choices": [{"index": 0, "delta": {"content": "", "role": "assistant", "reasoning": "**Unpacking the Riddle**\n\nI've moved past simple arithmetic and wordplay misdirections. The \"boy\" is key; if he's not adding a cat, and the question is about *the* cat's money, the boy's arrival must be a decoy, designed to distract from the core inquiry. I am now considering the logical implications of the question's wording. Is the \"now\" critical to unlocking the correct solution?\n\n\n", "reasoning_details": [{"type": "reasoning.text", "text": "**Unpacking the Riddle**\n\nI've moved past simple arithmetic and wordplay misdirections. The \"boy\" is key; if he's not adding a cat, and the question is about *the* cat's money, the boy's arrival must be a decoy, designed to distract from the core inquiry. I am now considering the logical implications of the question's wording. Is the \"now\" critical to unlocking the correct solution?\n\n\n", "format": "unknown", "index": 0}]}, "finish_reason": null, "logprobs": null, "matched_stop": null}], "usage": null}

data: {"id": "chatcmpl-c80f917c-63b1-4141-9945-bcc8087dfcea", "object": "chat.completion.chunk", "created": 1761168653, "model": "gemini-2.5-flash", "choices": [{"index": 0, "delta": {"content": "", "role": "assistant", "reasoning": "**Reframing the Problem**\n\nI've dismissed several straightforward interpretations, which led to considering the inherent characteristics of the subject, a cat, and the irrelevant element of the boy. The \"careful thinking\" directive confirms a need to consider a disconnect between the cat and money, and I am exploring the riddle's inherent assumptions, as well as the implied conditions of the question.\n\n\n", "reasoning_details": [{"type": "reasoning.text", "text": "**Reframing the Problem**\n\nI've dismissed several straightforward interpretations, which led to considering the inherent characteristics of the subject, a cat, and the irrelevant element of the boy. The \"careful thinking\" directive confirms a need to consider a disconnect between the cat and money, and I am exploring the riddle's inherent assumptions, as well as the implied conditions of the question.\n\n\n", "format": "unknown", "index": 0}]}, "finish_reason": null, "logprobs": null, "matched_stop": null}], "usage": null}

data: {"id": "chatcmpl-c80f917c-63b1-4141-9945-bcc8087dfcea", "object": "chat.completion.chunk", "created": 1761168653, "model": "gemini-2.5-flash", "choices": [{"index": 0, "delta": {"content": "", "role": "assistant", "reasoning": "**Unraveling the Conundrum**\n\nI've now considered the complete lack of financial capacity cats inherently possess, which further solidified the answer. The phrase, \"think carefully,\" was a signal to look beyond the numbers and at the core question: Does a cat have money? I have also eliminated all possible distractions and am confident in the final answer.\n\n\n", "reasoning_details": [{"type": "reasoning.text", "text": "**Unraveling the Conundrum**\n\nI've now considered the complete lack of financial capacity cats inherently possess, which further solidified the answer. The phrase, \"think carefully,\" was a signal to look beyond the numbers and at the core question: Does a cat have money? I have also eliminated all possible distractions and am confident in the final answer.\n\n\n", "format": "unknown", "index": 0}]}, "finish_reason": null, "logprobs": null, "matched_stop": null}], "usage": null}

data: {"id": "chatcmpl-c80f917c-63b1-4141-9945-bcc8087dfcea", "object": "chat.completion.chunk", "created": 1761168653, "model": "gemini-2.5-flash", "choices": [{"index": 0, "delta": {"content": "", "role": "assistant", "reasoning": "\n", "reasoning_details": [{"type": "reasoning.text", "text": "\n", "format": "unknown", "index": 0}]}, "finish_reason": null, "logprobs": null, "matched_stop": null}], "usage": null}

data: {"id": "chatcmpl-c80f917c-63b1-4141-9945-bcc8087dfcea", "object": "chat.completion.chunk", "created": 1761168653, "model": "gemini-2.5-flash", "choices": [{"index": 0, "delta": {"content": "\n\n", "role": "assistant", "reasoning": null, "reasoning_details": []}, "finish_reason": null, "logprobs": null, "matched_stop": null}], "usage": null}

data: {"id": "chatcmpl-c80f917c-63b1-4141-9945-bcc8087dfcea", "object": "chat.completion.chunk", "created": 1761168653, "model": "gemini-2.5-flash", "choices": [{"index": 0, "delta": {"content": "\u0423 \u043a\u043e\u0448\u043a\u0438, \u043a\u0430\u043a \u0438 \u0443 \u043b\u044e\u0431\u043e\u0439 \u0434\u0440\u0443\u0433\u043e\u0439 \u043a\u043e\u0448\u043a\u0438, \u043d\u0435\u0442 \u0434\u0435\u043d\u0435\u0433. \u041a\u043e\u0448\u043a\u0438 \u043d\u0435 \u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442\u0441\u044f \u0434\u0435\u043d\u044c\u0433\u0430\u043c\u0438. \u0418\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u0430 \u043a\u043e\u0448\u0435\u043a \u0432 \u0434\u043e\u043c\u0435 \u043d\u0438\u043a\u0430\u043a \u043d\u0435 \u0432\u043b\u0438\u044f\u0435\u0442 \u043d\u0430 \u0438\u0445 \u0444\u0438\u043d\u0430\u043d\u0441\u043e\u0432\u043e\u0435 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435, \u043f\u043e\u0441\u043a\u043e\u043b\u044c\u043a\u0443 \u0435\u0433\u043e \u0443 \u043d\u0438\u0445 \u043d\u0435\u0442.\n\n\u0422\u0430\u043a \u0447\u0442\u043e \u0434\u0435\u043d\u0435\u0433 \u0443 \u043a\u043e\u0448\u043a\u0438 **\u043d\u043e\u043b\u044c**.", "role": "assistant", "reasoning": null, "reasoning_details": []}, "finish_reason": null, "logprobs": null, "matched_stop": null}], "usage": null}

data: {"id":"chatcmpl-c80f917c-63b1-4141-9945-bcc8087dfcea","object":"chat.completion.chunk","created":1761168653,"model":"gemini-2.5-flash","choices":[{"index":0,"delta":{},"finish_reason":"stop"}],"usage":{"prompt_tokens":39,"completion_tokens":55,"total_tokens":94}}

data: [DONE]