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把任意 URL 转成 Markdown,为大模型提供更好的事实依据。
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让搜索相关性最大化的重排模型。
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在 Elasticsearch 中原生运行 Jina 模型。
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分类器

针对多模态和多语言数据的高性能零样本和少样本分类器。

分类器 API

试用我们的 API 沙盒,看看分类器的实际效果。
keyAPI 密钥与计费
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upload
请求
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." } + 添加输入 ], "labels": [ "Simple task", "Complex reasoning", "Creative writing", "Complex reasoning", "Creative writing", "Simple task" ] }
EOFEOF


什么是分类器?

分类器是一项 API 服务,基于向量模型(jina-embeddings-v3、jina-clip-v2 和 jina-embeddings-v4)对文本和图片进行分类,既支持无需训练数据的零样本分类,也支持仅用少量样例的少样本学习。
阅读版本说明arrow_forward
Startup
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Corporate Culture
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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

何时使用零样本或少样本?

一般分类任务最多 256 个类别,用零样本分类作为默认方案即可立刻拿到结果;如果数据属于向量模型知识范围之外的特定领域,或时效性强、需要持续更新模型,则更适合用少样本学习。
特性零样本少样本
主要用例通用分类任务的默认方案适用于 v3/clip-v1 领域之外的数据或时效性强的数据
多模态和多语言支持checkcheck
需要训练数据closecheck
/train 中是否需要标签不适用check
/classify 中是否需要标签checkclose
需要分类器 IDclosecheck
需要语义标签checkclose
状态管理无状态有状态
持续模型更新closecheck
访问控制closecheck
最大类别数25616
最大分类器数不适用16
每次请求的最大输入数1,0241,024
每条输入的最大词元长度8192 个词元8192 个词元

API 定价

API 按词元用量计费。一个 API 密钥即可访问所有搜索底座产品。
使用 Jina Search Foundation API
访问我们全部产品最简单的方式,按需充值词元。
为此 API 密钥充值更多词元
根据您所在的地区,扣款币种可能为美元、欧元或其他货币,并可能需要缴纳税费。
请输入正确的 API 密钥以充值
了解速率限制
速率限制指每个 IP 地址/API 密钥每分钟可发起的最大请求数(RPM)。各产品和各档位的速率限制详见下表。
keyboard_arrow_down
速率限制
速率限制按以下维度统计:RPM(每分钟请求数)和 TPM(每分钟词元数)。限制按 IP/API 密钥分别计算,RPM 或 TPM 任一先达到阈值即触发限制。若您在请求头中提供了 API 密钥,我们将按密钥而非 IP 地址统计速率限制。
产品API 端点描述arrow_upward无 API 密钥key_off免费 API 密钥key付费 API 密钥key高级 API 密钥key平均延迟词元用量计算方式允许的请求
Reader APIhttps://r.jina.ai将 URL 转换为大模型友好文本20 RPM500 RPM500 RPMtrending_up5000 RPM7.9s按输出响应中的词元数计算。GET/POST
Reader APIhttps://s.jina.ai搜索网络并将结果转换为大模型友好文本block100 RPM100 RPMtrending_up1000 RPM2.5s每次请求消耗固定数量的词元,起步 10000 个词元GET/POST
Reranker APIhttps://api.jina.ai/v1/rerank按查询对文档重排block100 RPM & 100,000 TPM500 RPM & 2,000,000 TPMtrending_up5,000 RPM & 50,000,000 TPM
ssid_chart
取决于输入大小
help
按输入请求中的词元数计算。POST
向量模型 APIhttps://api.jina.ai/v1/embeddings将文本/图片转为定长向量block100 RPM & 100,000 TPM500 RPM & 2,000,000 TPMtrending_up5,000 RPM & 50,000,000 TPM
ssid_chart
取决于输入大小
help
按输入请求中的词元数计算。POST

常见问题

code
我可以在所有 Jina API 中使用同一个 API 密钥吗?
keyboard_arrow_down
是的。一个 API 密钥可用于 Jina AI 搜索基础产品的所有功能,包括 Reader、Embeddings、Reranker、Classifier 和 Segmenter API,所有功能共享相同的token。
code
我可以查看 API 密钥的词元用量吗?
keyboard_arrow_down
可以,在“API 密钥与计费”标签页输入您的 API 密钥,即可查看近期用量记录和剩余词元。如果您已登录 API 控制面板,也可以在“管理 API 密钥”标签页查看这些信息。
code
如果我忘记了 API 密钥,该怎么办?
keyboard_arrow_down
如果您弄丢了已充值的密钥并希望找回,请用注册邮箱联系 support AT jina.ai。建议登录账户,这样 API 密钥可以安全保存、随时取用。
联系我们
code
API 密钥会过期吗?
keyboard_arrow_down
不会,API 密钥没有过期日期。如果密钥泄露,请在 API 密钥控制面板 中自行撤销,立即生效;想避免服务中断可以先申请一个替代密钥。任何剩余的 token 余额都留在账户里,而不是随撤销的密钥一起没了。如果您无法访问控制面板,或者怀疑账户本身被盗用,请联系 Elastic Support。
联系我们
code
可以在不同 API 密钥之间转移词元吗?
keyboard_arrow_down
可以,您能把词元从一个高级密钥转到另一个密钥。在 API 密钥控制面板登录账户后,进入待转出密钥的设置页,即可转移全部剩余的付费词元。
code
我可以销毁我的 API 密钥吗?
keyboard_arrow_down
可以,如果您认为密钥已泄露,可以销毁它。销毁后,所有保存该密钥的用户都会立即无法使用,剩余额度和关联属性也将永久失效。如果是高级密钥,您可以在销毁前把剩余的付费额度转移到另一个密钥。请注意,此操作无法撤销。要销毁密钥,请前往 API 密钥控制面板中的密钥设置。
code
为什么有些模型的首次请求比较慢?
keyboard_arrow_down
这是因为我们的无服务器架构会在使用率较低时卸载部分模型。首次请求会激活或“预热”模型,需要几秒钟。激活之后,后续请求的处理速度会快得多。
code
我的 API 数据会被用来训练你们的模型吗?
keyboard_arrow_down
不会。我们绝不会用您的 API 请求、输入或输出来训练向量模型、重排模型或任何其他模型。您的数据始终属于您。
code
Jina API 的速率限制是多少?
keyboard_arrow_down
每个 API 密钥均有速率限制:

免费版: 100 RPM,100K TPM
付费版: 500 RPM,2M TPM
高级版: 5,000 RPM,50M TPM

此外,每 60 秒还存在 10,000 次请求的 IP 地址限制。不同端点的限制有所不同;请参阅上方的速率限制表,了解每个端点的具体限制。
code
API 有批量大小限制吗?
keyboard_arrow_down
Embeddings 和 Reranker API 都没有批量大小限制,每次请求可以发送任意数量的条目或文档。两个 API 都会在内部按词元数对输入分批,以充分利用 GPU。
code
Jina API 与 Elastic 中的 Jina 模型是同一回事吗?
keyboard_arrow_down
不,这是三种不同的路径。本网站上的 Jina API 是自助式的,采用按需付费模式,需要 Jina API 密钥。Elastic Inference Service (EIS) 在 Elastic Cloud 中运行 Jina 模型,费用通过您的 Elastic 订阅收取,无需您管理任何基础设施。Jina On-Prem 是 Elastic 自 2026 年 8 月 10 日起作为其独立 SKU 销售的商业许可证,用于在您自己的自管理本地或物理隔离的基础设施中运行模型。有关 EIS 和 On-Prem 路径的更多信息,请联系 Elastic Sales。

如何获取我的 API 密钥?

video_not_supported

速率限制是多少?

速率限制
速率限制按以下维度统计:RPM(每分钟请求数)和 TPM(每分钟词元数)。限制按 IP/API 密钥分别计算,RPM 或 TPM 任一先达到阈值即触发限制。若您在请求头中提供了 API 密钥,我们将按密钥而非 IP 地址统计速率限制。
产品API 端点描述arrow_upward无 API 密钥key_off免费 API 密钥key付费 API 密钥key高级 API 密钥key平均延迟词元用量计算方式允许的请求
Reader APIhttps://r.jina.ai将 URL 转换为大模型友好文本20 RPM500 RPM500 RPMtrending_up5000 RPM7.9s按输出响应中的词元数计算。GET/POST
Reader APIhttps://s.jina.ai搜索网络并将结果转换为大模型友好文本block100 RPM100 RPMtrending_up1000 RPM2.5s每次请求消耗固定数量的词元,起步 10000 个词元GET/POST
Reranker APIhttps://api.jina.ai/v1/rerank按查询对文档重排block100 RPM & 100,000 TPM500 RPM & 2,000,000 TPMtrending_up5,000 RPM & 50,000,000 TPM
ssid_chart
取决于输入大小
help
按输入请求中的词元数计算。POST
向量模型 APIhttps://api.jina.ai/v1/embeddings将文本/图片转为定长向量block100 RPM & 100,000 TPM500 RPM & 2,000,000 TPMtrending_up5,000 RPM & 50,000,000 TPM
ssid_chart
取决于输入大小
help
按输入请求中的词元数计算。POST
与计费相关的常见问题
attach_money
API 是按句子数还是按请求数计费?
keyboard_arrow_down
我们按处理的词元总数计费,您可以把这些词元灵活分配到任意数量的句子上,用更低的成本满足各种文本分析需求。
attach_money
新用户可以免费试用吗?
keyboard_arrow_down
是的。新用户将获得一个自动生成的 API 密钥,其中包含可在我们所有模型中使用的免费代币。免费代币用完后,您可以在“购买代币”选项卡中为该密钥购买更多代币。
attach_money
失败的请求是否会扣除词元?
keyboard_arrow_down
不,失败的请求不会扣除词元。
attach_money
接受哪些付款方式?
keyboard_arrow_down
付款通过 Stripe 处理,支持信用卡、Google Pay、PayPal 等多种方式,方便您选择。
attach_money
充值后可以开具发票吗?
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对于自助代币购买,Stripe 会在购买时向您 Stripe 账户关联的电子邮件地址发送发票。如果您需要正式的采购订单、协商合同、采购文件或通过 Elastic 而非 Stripe 处理的合并账单,请联系 Elastic Sales。
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如何购买商业许可证而不是API令牌?
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在本站购买代币仅涵盖使用托管的 Jina API。这些代币不包含您在自有基础设施上运行模型权重的许可。为此,Elastic 自 2026 年 8 月 10 日起以商业许可的形式单独销售,按年收费,而非按代币收费。如需报价,请联系 Elastic Sales。
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我可以用发票或采购订单付款,而不是用信用卡吗?
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自助代币购买通过 Stripe 处理,发票将自动发送到您的 Stripe 帐户邮箱。对于采购订单、采购流程或超出自助充值支持的交易量,请联系 Elastic Sales。
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我已付款,但余额或速率限制没有变化,该检查什么?
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余额和速率限制属于 API key,不属于账号,所以先查 key 本身而不是账号页面:在「API Key & Billing」标签里输入该 key,确认余额和档位。如果账号下有多个 key,token 充在了被充值的那个 key 上,未必是您应用实际在用的那个。另外付款后新档位生效可能有短暂延迟。如果 key 已显示余额、但过后仍被限制在原档位,请联系支持。
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如何取消、关闭自动充值或删除已保存的付款方式?
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自助计费在客户门户中管理,入口在「API Key & Billing」标签,可在那里关闭自动充值、移除已保存的付款方式。关闭自动充值只是停止后续扣款,已购买的余额仍可继续使用。如果您还需要删除账号及其数据,或希望申请退款,请把请求发给支持;账号删除为人工处理,需要几个工作日,完成后会有书面确认。
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