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把任意 URL 轉成 Markdown,為大模型提供更好的事實依據。
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多模態多語言向量模型。
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讓搜尋相關性最大化的重排模型。
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在 Elasticsearch 中原生執行 Jina 模型。
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分類器

針對多模態和多語言資料的高效能零樣本和少樣本分類器。

分類器 API

試用我們的 API 沙盒,看看分類器的實際效果。
keyAPI 金鑰與計費
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upload
請求
POST
curl "https://api.jina.ai/v1/classify" \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $JINA_API_KEY" \
-d @- <<EOFEOF
{ "input": [ text_fieldsclose{ "text": "Calculate the compound interest on a principal of $10,000 invested for 5 years at an annual rate of 5%, compounded quarterly." }, text_fieldsclose{ "text": "分析使用CRISPR基因编辑技术在人类胚胎中的伦理影响。考虑潜在的医疗益处和长期社会后果。" }, text_fieldsclose{ "text": "AIが自意識を持つディストピアの未来を舞台にした短編小説を書いてください。人間とAIの関係や意識の本質をテーマに探求してください。" }, text_fieldsclose{ "text": "Erklären Sie die Unterschiede zwischen Merge-Sort und Quicksort-Algorithmen in Bezug auf Zeitkomplex… Leistung in der Praxis." }, text_fieldsclose{ "text": "Write a poem about the beauty of nature and its healing power on the human soul." }, text_fieldsclose{ "text": "Translate the following sentence into French: The quick brown fox jumps over the lazy dog." } + 新增輸入 ], "labels": [ "Simple task", "Complex reasoning", "Creative writing", "Complex reasoning", "Creative writing", "Simple task" ] }
EOFEOF


什麼是分類器?

分類器是一項 API 服務,基於向量模型(jina-embeddings-v3、jina-clip-v2 和 jina-embeddings-v4)對文字和圖片進行分類,既支援無需訓練資料的零樣本分類,也支援僅用少量樣例的少樣本學習。
閱讀版本說明arrow_forward
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CHAPTER I. Down the Rabbit-Hole Alice was beginning to get very tired of sitting by her sister on the bank, and of having nothing to do: once or twice she had peeped into the book her sister was reading, but it had no pictures or conversations in it, “and what is the use of a book,” thought Alice “without pictures or conversations?” So she was considering in her own mind (as well as she could, for the hot day made her feel very sleepy and stupid), whether the pleasure of making a daisy-chain would be worth the trouble of getting up and picking the daisies, when suddenly a White Rabbit with pink eyes ran close by her. There was nothing so very remarkable in that; nor did Alice think it so very much out of the way to hear the Rabbit say to itself, “Oh dear! Oh dear! I shall be late!” (when she thought it over afterwards, it occurred to her that she ought to have wondered at this, but at the time it all seemed quite natural); but when the Rabbit actually took a watch out of its waistcoat-pocket, and looked at it, and then hurried on, Alice started to her feet, for it flashed across her mind that she had never before seen a rabbit with either a waistcoat-pocket, or a watch to take out of it, and burning with curiosity, she ran across the field after it, and fortunately was just in time to see it pop down a large rabbit-hole under the hedge. In another moment down went Alice after it, never once considering how in the world she was to get out again. The rabbit-hole went straight on like a tunnel for some way, and then dipped suddenly down, so suddenly that Alice had not a moment to think about stopping herself before she found herself falling down a very deep well. Either the well was very deep, or she fell very slowly, for she had plenty of time as she went down to look about her and to wonder what was going to happen next. First, she tried to look down and make out what she was coming to, but it was too dark to see anything; then she looked at the sides of the well, and noticed that they were filled with cupboards and book-shelves; here and there she saw maps and pictures hung upon pegs. She took down a jar from one of the shelves as she passed; it was labelled “ORANGE MARMALADE”, but to her great disappointment it was empty: she did not like to drop the jar for fear of killing somebody underneath, so managed to put it into one of the cupboards as she fell past it. “Well!” thought Alice to herself, “after such a fall as this, I shall think nothing of tumbling down stairs! How brave they’ll all think me at home! Why, I wouldn’t say anything about it, even if I fell off the top of the house!” (Which was very likely true.) Down, down, down. Would the fall never come to an end? “I wonder how many miles I’ve fallen by this time?” she said aloud. “I must be getting somewhere near the centre of the earth. Let me see: that would be four thousand miles down, I think—” (for, you see, Alice had learnt several things of this sort in her lessons in the schoolroom, and though this was not a very good opportunity for showing off her knowledge, as there was no one to listen to her, still it was good practice to say it over) “—yes, that’s about the right distance—but then I wonder what Latitude or Longitude I’ve got to?” (Alice had no idea what Latitude was, or Longitude either, but thought they were nice grand words to say.) Presently she began again. “I wonder if I shall fall right through the earth! How funny it’ll seem to come out among the people that walk with their heads downward! The Antipathies, I think—” (she was rather glad there was no one listening, this time, as it didn’t sound at all the right word) “—but I shall have to ask them what the name of the country is, you know. Please, Ma’am, is this New Zealand or Australia?” (and she tried to curtsey as she spoke—fancy curtseying as you’re falling through the air! Do you think you could manage it?) “And what an ignorant little girl she’ll think me for asking! No, it’ll never do to ask: perhaps I shall see it written up somewhere.” Down, down, down. There was nothing else to do, so Alice soon began talking again. “Dinah’ll miss me very much to-night, I should think!” (Dinah was the cat.) “I hope they’ll remember her saucer of milk at tea-time. Dinah my dear! I wish you were down here with me! There are no mice in the air, I’m afraid, but you might catch a bat, and that’s very like a mouse, you know. But do cats eat bats, I wonder?” And here Alice began to get rather sleepy, and went on saying to herself, in a dreamy sort of way, “Do cats eat bats? Do cats eat bats?” and sometimes, “Do bats eat cats?” for, you see, as she couldn’t answer either question, it didn’t much matter which way she put it. She felt that she was dozing off, and had just begun to dream that she was walking hand in hand with Dinah, and saying to her very earnestly, “Now, Dinah, tell me the truth: did you ever eat a bat?” when suddenly, thump! thump! down she came upon a heap of sticks and dry leaves, and the fall was over. Alice was not a bit hurt, and she jumped up on to her feet in a moment: she looked up, but it was all dark overhead; before her was another long passage, and the White Rabbit was still in sight, hurrying down it. There was not a moment to be lost: away went Alice like the wind, and was just in time to hear it say, as it turned a corner, “Oh my ears and whiskers, how late it’s getting!” She was close behind it when she turned the corner, but the Rabbit was no longer to be seen: she found herself in a long, low hall, which was lit up by a row of lamps hanging from the roof. There were doors all round the hall, but they were all locked; and when Alice had been all the way down one side and up the other, trying every door, she walked sadly down the middle, wondering how she was ever to get out again. Suddenly she came upon a little three-legged table, all made of solid glass; there was nothing on it except a tiny golden key, and Alice’s first thought was that it might belong to one of the doors of the hall; but, alas! either the locks were too large, or the key was too small, but at any rate it would not open any of them. However, on the second time round, she came upon a low curtain she had not noticed before, and behind it was a little door about fifteen inches high: she tried the little golden key in the lock, and to her great delight it fitted! Alice opened the door and found that it led into a small passage, not much larger than a rat-hole: she knelt down and looked along the passage into the loveliest garden you ever saw. How she longed to get out of that dark hall, and wander about among those beds of bright flowers and those cool fountains, but she could not even get her head through the doorway; “and even if my head would go through,” thought poor Alice, “it would be of very little use without my shoulders. Oh, how I wish I could shut up like a telescope! I think I could, if I only knew how to begin.” For, you see, so many out-of-the-way things had happened lately, that Alice had begun to think that very few things indeed were really impossible. There seemed to be no use in waiting by the little door, so she went back to the table, half hoping she might find another key on it, or at any rate a book of rules for shutting people up like telescopes: this time she found a little bottle on it, (“which certainly was not here before,” said Alice,) and round the neck of the bottle was a paper label, with the words “DRINK ME,” beautifully printed on it in large letters. It was all very well to say “Drink me,” but the wise little Alice was not going to do that in a hurry. “No, I’ll look first,” she said, “and see whether it’s marked ‘poison’ or not”; for she had read several nice little histories about children who had got burnt, and eaten up by wild beasts and other unpleasant things, all because they would not remember the simple rules their friends had taught them: such as, that a red-hot poker will burn you if you hold it too long; and that if you cut your finger very deeply with a knife, it usually bleeds; and she had never forgotten that, if you drink much from a bottle marked “poison,” it is almost certain to disagree with you, sooner or later. However, this bottle was not marked “poison,” so Alice ventured to taste it, and finding it very nice, (it had, in fact, a sort of mixed flavour of cherry-tart, custard, pine-apple, roast turkey, toffee, and hot buttered toast,) she very soon finished it off.
Children Literature
Fantasy
Victorian Era
First Chapter
Adventure
Literary Fiction
British Literature
Novel Excerpt
Third Person Narrative
Whimsical
Coming of Age
Interior Design
Minimalist
Scandinavian
Product Photography
Tech Art
Data Visualization
Modern Design
Office Decor
Documentary
AI History
  壬戌之秋,七月既望,苏子与客泛舟游于赤壁之下。清风徐来,水波不兴。举酒属客,诵明月之诗,歌窈窕之章。少焉,月出于东山之上,徘徊于斗牛之间。白露横江,水光接天。纵一苇之所如,凌万顷之茫然。浩浩乎如冯虚御风,而不知其所止;飘飘乎如遗世独立,羽化而登仙。(冯 通:凭)   于是饮酒乐甚,扣舷而歌之。歌曰:“桂棹兮兰桨,击空明兮溯流光。渺渺兮予怀,望美人兮天一方。”客有吹洞箫者,倚歌而和之。其声呜呜然,如怨如慕,如泣如诉;余音袅袅,不绝如缕。舞幽壑之潜蛟,泣孤舟之嫠妇。   苏子愀然,正襟危坐而问客曰:“何为其然也?”客曰:“‘月明星稀,乌鹊南飞’,此非曹孟德之诗乎?西望夏口,东望武昌,山川相缪,郁乎苍苍,此非孟德之困于周郎者乎?方其破荆州,下江陵,顺流而东也,舳舻千里,旌旗蔽空,酾酒临江,横槊赋诗,固一世之雄也,而今安在哉?况吾与子渔樵于江渚之上,侣鱼虾而友麋鹿,驾一叶之扁舟,举匏樽以相属。寄蜉蝣于天地,渺沧海之一粟。哀吾生之须臾,羡长江之无穷。挟飞仙以遨游,抱明月而长终。知不可乎骤得,托遗响于悲风。”   苏子曰:“客亦知夫水与月乎?逝者如斯,而未尝往也;盈虚者如彼,而卒莫消长也。盖将自其变者而观之,则天地曾不能以一瞬;自其不变者而观之,则物与我皆无尽也,而又何羡乎!且夫天地之间,物各有主,苟非吾之所有,虽一毫而莫取。惟江上之清风,与山间之明月,耳得之而为声,目遇之而成色,取之无禁,用之不竭。是造物者之无尽藏也,而吾与子之所共适。”(共适 一作:共食)   客喜而笑,洗盏更酌。肴核既尽,杯盘狼籍。相与枕藉乎舟中,不知东方之既白。
Classical Chinese
Song Dynasty
Literary Prose
Philosophy
Nature Writing
Rhapsody
Historical
Meditation
Poetry Prose
Confucian

何時使用零樣本或少樣本?

一般分類任務最多 256 個類別,用零樣本分類作為預設方案即可立刻拿到結果;如果資料屬於向量模型知識範圍之外的特定領域,或時效性強、需要持續更新模型,則更適合用少樣本學習。
特性零樣本少樣本
主要用例通用分類任務的預設方案適用於 v3/clip-v1 領域之外的資料或時效性強的資料
多模態和多語言支援checkcheck
需要訓練資料closecheck
/train 中是否需要標籤不適用check
/classify 中是否需要標籤checkclose
需要分類器 IDclosecheck
需要語義標籤checkclose
狀態管理無狀態有狀態
持續模型更新closecheck
訪問控制closecheck
最大類別數25616
最大分類器數不適用16
每次請求的最大輸入數1,0241,024
每條輸入的最大詞元長度8192 個詞元8192 個詞元

API 定價

API 按詞元用量計費。一個 API 金鑰即可訪問所有搜尋底座產品。
使用 Jina Search Foundation API
訪問我們全部產品最簡單的方式,按需儲值詞元。
為此 API 金鑰儲值更多詞元
根據您所在的地區,扣款幣種可能為美元、歐元或其他貨幣,並可能需要繳納稅費。
請輸入正確的 API 金鑰以儲值
瞭解速率限制
速率限制指每個 IP 地址/API 金鑰每分鐘可發起的最大請求數(RPM)。各產品和各檔位的速率限制詳見下表。
keyboard_arrow_down
速率限制
速率限制按以下維度統計:RPM(每分鐘請求數)和 TPM(每分鐘詞元數)。限制按 IP/API 金鑰分別計算,RPM 或 TPM 任一先達到閾值即觸發限制。若您在請求頭中提供了 API 金鑰,我們將按金鑰而非 IP 地址統計速率限制。
產品API 端點描述arrow_upward無 API 金鑰key_off免費 API 金鑰key付費 API 金鑰key高級 API 金鑰key平均延遲詞元用量計算方式允許的請求
Reader APIhttps://r.jina.ai將 URL 轉換為大模型友好文字20 RPM500 RPM500 RPMtrending_up5000 RPM7.9s按輸出響應中的詞元數計算。GET/POST
Reader APIhttps://s.jina.ai搜尋網路並將結果轉換為大模型友好文字block100 RPM100 RPMtrending_up1000 RPM2.5s每次請求消耗固定數量的詞元,起步 10000 個詞元GET/POST
Reranker APIhttps://api.jina.ai/v1/rerank按查詢對文件重排block100 RPM & 100,000 TPM500 RPM & 2,000,000 TPMtrending_up5,000 RPM & 50,000,000 TPM
ssid_chart
取決於輸入大小
help
按輸入請求中的詞元數計算。POST
向量模型 APIhttps://api.jina.ai/v1/embeddings將文字/圖片轉為定長向量block100 RPM & 100,000 TPM500 RPM & 2,000,000 TPMtrending_up5,000 RPM & 50,000,000 TPM
ssid_chart
取決於輸入大小
help
按輸入請求中的詞元數計算。POST

常見問題

code
我可以在所有 Jina API 中使用同一個 API 金鑰嗎?
keyboard_arrow_down
可以,同一個 API 金鑰適用於 Jina AI 的所有搜尋底座產品,包括 Reader、向量模型、重排、分類和微調 API,詞元額度在各項服務之間共享。
code
我可以查看 API 金鑰的詞元用量嗎?
keyboard_arrow_down
可以,在「API 金鑰與計費」標籤頁輸入您的 API 金鑰,即可查看近期用量記錄和剩餘詞元。如果您已登入 API 控制面板,也可以在「管理 API 金鑰」標籤頁查看這些資訊。
code
如果我忘記了 API 金鑰,該怎麼辦?
keyboard_arrow_down
如果您弄丟了已儲值的金鑰並希望找回,請用註冊郵箱聯繫 support AT jina.ai。建議登入帳戶,這樣 API 金鑰可以安全保存、隨時取用。
聯絡我們
code
API 金鑰會過期嗎?
keyboard_arrow_down
不會,我們的 API 金鑰沒有有效期。但如果您懷疑金鑰已洩漏並希望停用,請聯繫我們的支援團隊。您也可以在 API 金鑰控制面板中自行銷毀金鑰。
聯絡我們
code
可以在不同 API 金鑰之間轉移詞元嗎?
keyboard_arrow_down
可以,您能把詞元從一個高級金鑰轉到另一個金鑰。在 API 金鑰控制面板登入帳戶後,進入待轉出金鑰的設置頁,即可轉移全部剩餘的付費詞元。
code
我可以銷毀我的 API 金鑰嗎?
keyboard_arrow_down
可以,如果您認為金鑰已洩漏,可以銷毀它。銷毀後,所有保存該金鑰的使用者都會立即無法使用,剩餘額度和關聯屬性也將永久失效。如果是高級金鑰,您可以在銷毀前把剩餘的付費額度轉移到另一個金鑰。請注意,此操作無法撤銷。要銷毀金鑰,請前往 API 金鑰控制面板中的金鑰設置。
code
為什麼有些模型的首次請求比較慢?
keyboard_arrow_down
這是因為我們的無伺服器架構會在使用率較低時解除安裝部分模型。首次請求會啟用或“預熱”模型,需要幾秒鐘。啟用之後,後續請求的處理速度會快得多。
code
我的 API 資料會被用來訓練你們的模型嗎?
keyboard_arrow_down
不會。我們絕不會用您的 API 請求、輸入或輸出來訓練向量模型、重排模型或任何其他模型。您的資料始終屬於您。
code
Jina API 的速率限制是多少?
keyboard_arrow_down
速率限制按 API 金鑰計算:

免費版:100 RPM,100K TPM,2 個併發請求
付費版:500 RPM,2M TPM,50 個併發請求
高級版:5,000 RPM,50M TPM,500 個併發請求

此外還有基於 IP 的速率限制,每 60 秒 10,000 個請求。以上限制適用於所有 Jina API(Embeddings、Reranker、Reader 等)。
code
API 有批次大小限制嗎?
keyboard_arrow_down
Embeddings 和 Reranker API 都沒有批次大小限制,每次請求可以傳送任意數量的條目或文件。兩個 API 都會在內部按詞元數對輸入分批,以充分利用 GPU。
code
Jina API 與 Elastic 中的 Jina 模型是同一回事嗎?
keyboard_arrow_down
不,這是三種不同的路徑。本網站上的 Jina API 是自助式的,採用按需付費模式,需要 Jina API 金鑰。Elastic Inference Service (EIS) 在 Elastic Cloud 中執行 Jina 模型,費用透過您的 Elastic 訂閱收取,無需您管理任何基礎設施。Jina On-Prem 是 Elastic 自 2026 年 8 月 10 日起作為其獨立 SKU 銷售的商業許可證,用於在您自己的自管理本地或物理隔離的基礎設施中執行模型。有關 EIS 和 On-Prem 路徑的更多資訊,請聯絡 Elastic Sales。

如何獲取我的 API 金鑰?

video_not_supported

速率限制是多少?

速率限制
速率限制按以下維度統計:RPM(每分鐘請求數)和 TPM(每分鐘詞元數)。限制按 IP/API 金鑰分別計算,RPM 或 TPM 任一先達到閾值即觸發限制。若您在請求頭中提供了 API 金鑰,我們將按金鑰而非 IP 地址統計速率限制。
產品API 端點描述arrow_upward無 API 金鑰key_off免費 API 金鑰key付費 API 金鑰key高級 API 金鑰key平均延遲詞元用量計算方式允許的請求
Reader APIhttps://r.jina.ai將 URL 轉換為大模型友好文字20 RPM500 RPM500 RPMtrending_up5000 RPM7.9s按輸出響應中的詞元數計算。GET/POST
Reader APIhttps://s.jina.ai搜尋網路並將結果轉換為大模型友好文字block100 RPM100 RPMtrending_up1000 RPM2.5s每次請求消耗固定數量的詞元,起步 10000 個詞元GET/POST
Reranker APIhttps://api.jina.ai/v1/rerank按查詢對文件重排block100 RPM & 100,000 TPM500 RPM & 2,000,000 TPMtrending_up5,000 RPM & 50,000,000 TPM
ssid_chart
取決於輸入大小
help
按輸入請求中的詞元數計算。POST
向量模型 APIhttps://api.jina.ai/v1/embeddings將文字/圖片轉為定長向量block100 RPM & 100,000 TPM500 RPM & 2,000,000 TPMtrending_up5,000 RPM & 50,000,000 TPM
ssid_chart
取決於輸入大小
help
按輸入請求中的詞元數計算。POST
與計費相關的常見問題
attach_money
API 是按句子數還是按請求數計費?
keyboard_arrow_down
我們按處理的詞元總數計費,您可以把這些詞元靈活分配到任意數量的句子上,用更低的成本滿足各種文字分析需求。
attach_money
新使用者可以免費試用嗎?
keyboard_arrow_down
我們為新使用者提供免費試用:系統自動生成的 API 金鑰內含一千萬詞元,可用於我們的任何模型。免費額度用完後,您可以在「儲值」標籤頁為金鑰購買更多詞元。
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失敗的請求是否會扣除詞元?
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不,失敗的請求不會扣除詞元。
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接受哪些付款方式?
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付款透過 Stripe 處理,支援信用卡、Google Pay、PayPal 等多種方式,方便您選擇。
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儲值後可以開具發票嗎?
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可以,儲值後發票會傳送到與您 Stripe 帳戶關聯的郵箱。
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如何購買商業授權證而不是API令牌?
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在本站購買代幣僅涵蓋使用託管的 Jina API。這些代幣不包含您在自有基礎設施上執行模型權重的許可。為此,Elastic 自 2026 年 8 月 10 日起以商業授權的形式單獨銷售,按年收費,而非按代幣收費。如需報價,請聯絡 Elastic Sales。
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我可以用發票或採購訂單付款,而不是用信用卡嗎?
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自助代幣購買透過 Stripe 處理,發票將自動傳送到您的 Stripe 帳戶郵箱。對於採購訂單、採購流程或超出自助儲值支援的交易量,請聯絡 Elastic Sales。
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我已付款,但餘額或速率限制沒有變化,該檢查什麼?
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餘額和速率限制屬於 API key,不屬於帳號,所以先查 key 本身而不是帳號頁面:在「API Key & Billing」分頁中輸入該 key,確認餘額和級距。如果帳號下有多個 key,token 充在了已儲值的那個 key 上,未必是您應用實際在用的那個。另外付款後新級距生效可能有短暫延遲。如果 key 已顯示餘額、但過後仍被限制在原級距,請聯絡支援。
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如何取消、關閉自動儲值或刪除已儲存的付款方式?
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自助計費在客戶門戶中管理,入口在「API Key & Billing」分頁,可在那裡關閉自動儲值、移除已儲存的付款方式。關閉自動儲值只是停止後續扣款,已購買的餘額仍可繼續使用。如果您還需要刪除帳號及其資料,或希望申請退款,請把請求發給支援;帳號刪除為人工處理,需要幾個工作日,完成後會有書面確認。
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