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读取器
读取URL或搜索为大模型提供更好的依据。
向量模型
世界一流的多模态多语言向量模型。
重排器
世界一流的重排器,最大限度地提高搜索相关性。
深度搜索
搜索、读取并推理直到找到最佳答案。
更多的
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分类器
图片和文本的零样本和少样本分类。
切分器
将长文本切分成块或词元。

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为您的AI 编程助手 IDE 或大模型自动生成代码
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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 沙盒实验场来了解我们的分类器如何工作。
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要分类的输入
对于文本,它可以是最多 8192 个词元的句子。对于图片,它可以是 URL 或 base64 编码的图片。

upload
请求
curl https://api.jina.ai/v1/classify \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer " \
  -d @- <<EOFEOF
  {
    "input": [
        {
            "text": "Calculate the compound interest on a principal of $10,000 invested for 5 years at an annual rate of 5%, compounded quarterly."
        },
        {
            "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": "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": "Erklären Sie die Unterschiede zwischen Merge-Sort und Quicksort-Algorithmen in Bezug auf Zeitkomplexität, Platzkomplexität und Leistung in der Praxis."
        },
        {
            "text": "Write a poem about the beauty of nature and its healing power on the human soul."
        },
        {
            "text": "Translate the following sentence into French: The quick brown fox jumps over the lazy dog."
        }
    ],
    "labels": [
        "Simple task",
        "Complex reasoning",
        "Creative writing",
        "Complex reasoning",
        "Creative writing",
        "Simple task"
    ]
  }
EOFEOF


什么是分类器?

分类器是一种 API 服务,它使用向量模型 (jina-embeddings-v3 和 jina-clip-v1) 对文本和图片进行分类,支持无需训练数据的零样本分类和使用最少示例的少样本学习。
读取发行说明arrow_forward
Startup
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Corporate Culture
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Modern Workplace
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

何时使用零样本或小样本?

使用零样本分类作为默认解决方案,可以在最多 256 个类别的一般分类任务中获得即时结果,而少样本学习更适合处理向量模型知识之外的特定领域数据,或者需要处理需要持续模型更新的时间敏感数据。
特点零样本少量样本
主要用例一般分类问题的默认解决方案对于 v3/clip-v1 域之外的数据或时间敏感的数据
多模态和多语言支持checkcheck
需要训练数据closecheck
/train 中需要的标注不适用check
/classify 中需要的标注checkclose
必需分类器 IDclosecheck
需要语义标注checkclose
状态管理无状态有状态
持续模型更新closecheck
访问控制closecheck
最大类数25616
最大分类器不适用16
每个请求的最大输入1,0241,024
每个输入的最大词元长度8192 个词元8192 个词元

API价格表

API 定价基于词元使用情况。一个 API 密钥即可访问所有搜索基础产品。
使用Jina 搜索底座API
访问我们所有产品的最简单方法。随时充值词元。
使用更多词元充值此 API 密钥
根据您所在的位置,您可能需要支付美元、欧元或其他货币的费用。可能需缴纳税费。
请输入正确的API密钥进行充值
了解速率限制
速率限制是指每个 IP 地址/API 密钥 (RPM) 在一分钟内可以向 API 发出的最大请求数。请在下面详细了解每个产品和层级的速率限制。
keyboard_arrow_down
速率限制
速率限制通过三种方式跟踪:RPM(每分钟请求数)和TPM(每分钟词元数)。限制按 IP/API 密钥强制执行,当首先达到 RPM 或 TPM 阈值时,将触发限制。当您在请求标头中提供 API 密钥时,我们会按密钥而不是 IP 地址跟踪速率限制。
产品API端口描述arrow_upward无 API 密钥key_off使用 API 密钥key带有高级 API 密钥key平均延迟词元使用计数请求类型
读取器 APIhttps://r.jina.ai将 URL 转换为大模型友好文本20 RPM500 RPMtrending_up5000 RPM7.9s以输出响应中的词元数量为准。GET/POST
读取器 APIhttps://s.jina.ai搜索网络并将结果转换为大模型友好文本block100 RPMtrending_up1000 RPM2.5s每个请求都需要固定数量的词元,从 10000 个词元开始GET/POST
深度搜索https://deepsearch.jina.ai/v1/chat/completions推理、搜索和迭代以找到最佳答案block50 RPM500 RPM56.7s统计整个过程中词元的总数。POST
向量模型APIhttps://api.jina.ai/v1/embeddings将文本/图片转为定长向量block500 RPM & 1,000,000 TPMtrending_up2,000 RPM & 5,000,000 TPM
ssid_chart
取决于输入大小
help
以输入请求中的词元数量为准。POST
重排器 APIhttps://api.jina.ai/v1/rerank按查询对文档进行精排block500 RPM & 1,000,000 TPMtrending_up2,000 RPM & 5,000,000 TPM
ssid_chart
取决于输入大小
help
以输入请求中的词元数量为准。POST
分类器 APIhttps://api.jina.ai/v1/train使用训练样本训练分类器block20 RPM & 200,000 TPM60 RPM & 1,000,000 TPM
ssid_chart
取决于输入大小
词元计数为:输入词元 × 迭代次数POST
分类器 API (少量样本)https://api.jina.ai/v1/classify使用经过训练的少样本分类器对输入进行分类block20 RPM & 200,000 TPM60 RPM & 1,000,000 TPM
ssid_chart
取决于输入大小
词元计数为:输入词元POST
分类器 API (零样本)https://api.jina.ai/v1/classify使用零样本分类对输入进行分类block200 RPM & 500,000 TPM1,000 RPM & 3,000,000 TPM
ssid_chart
取决于输入大小
词元计数为:输入词元 加 标签词元POST
切分器 APIhttps://api.jina.ai/v1/segment对长文本进行分词分句20 RPM200 RPM1,000 RPM0.3s词元不计算使用量。GET/POST

常见问题

零样本和小样本的标签有何不同?
keyboard_arrow_down
零样本分类需要语义标签,训练时不需要,而少样本分类则需要训练时需要标签,但分类时不需要。这意味着零样本分类更适合灵活、即时的分类需求,而少样本分类更适合固定的、特定领域的类别,这些类别可以随时间而演变。
num_iters 有什么用处以及如何使用它?
keyboard_arrow_down
num_iters 控制训练强度 - 较高的值会强化重要示例,而较低的值会最大限度地减少不太可靠数据的影响。它可用于通过为近期示例提供更高的迭代次数来实现时间感知学习,这使其对于不断发展的数据模式很有价值。
公共分类器共享如何工作?
keyboard_arrow_down
任何拥有 classifier_id 的人都可以使用公共分类器,并消耗自己的词元配额。用户无法访问训练数据或配置,也无法查看其他人的分类请求,从而实现安全的分类器共享。
我需要多少数据才能使小样本研究发挥良好作用?
keyboard_arrow_down
少量样本需要 200-400 个训练样本才能超越零样本分类。虽然它最终会实现更高的准确率,但需要这段预热期才能发挥作用。零样本无需训练数据即可立即提供一致的性能。
它能处理多种语言和文本/图片吗?
keyboard_arrow_down
是的 - API 支持使用 jina-embeddings-v3 进行多语言查询和使用 jina-clip-v1 进行多模态(文本/图片)分类,并支持在同一请求中对 URL 或 base64 编码的图片进行支持。
我应该了解哪些硬性限制?
keyboard_arrow_down
Zero-shot 支持 256 个类别,没有分类器限制,而 few-shot 则限制为 16 个类别和 16 个分类器。两者均支持每个请求 1,024 个输入和每个输入 8,192 个词元。
我该如何处理随时间而发生的数据变化?
keyboard_arrow_down
少量样本模式允许通过 /train 端点进行持续更新,以适应不断变化的数据模式。当数据分布发生变化时,您可以逐步添加新的示例或类别,而无需重建整个分类器。
我发送训练数据后会发生什么情况?
keyboard_arrow_down
该 API 使用一次性在线学习 - 训练示例会更新分类器权重,但之后不会存储。这意味着您无法检索历史训练数据,但它可以确保隐私和资源效率。
零样本与小样本——何时使用哪个?
keyboard_arrow_down
当您需要使用语义标签进行灵活分类时,请从零样本开始,以获得即时结果。当您有 200-400 个示例、需要更高的准确度或需要处理特定领域/时间敏感的数据时,请切换到少样本。
我可以针对不同的语言/任务使用不同的模型吗?
keyboard_arrow_down
是的,您可以选择 jina-embeddings-v3 进行文本分类(特别适合多语言)和 jina-clip-v1 进行多模态分类。新模型(如 jina-clip-v2)将在发布时通过 API 自动提供。

如何获取我的 API 密钥?

video_not_supported

速率限制是多少?

速率限制
速率限制通过三种方式跟踪:RPM(每分钟请求数)和TPM(每分钟词元数)。限制按 IP/API 密钥强制执行,当首先达到 RPM 或 TPM 阈值时,将触发限制。当您在请求标头中提供 API 密钥时,我们会按密钥而不是 IP 地址跟踪速率限制。
产品API端口描述arrow_upward无 API 密钥key_off使用 API 密钥key带有高级 API 密钥key平均延迟词元使用计数请求类型
读取器 APIhttps://r.jina.ai将 URL 转换为大模型友好文本20 RPM500 RPMtrending_up5000 RPM7.9s以输出响应中的词元数量为准。GET/POST
读取器 APIhttps://s.jina.ai搜索网络并将结果转换为大模型友好文本block100 RPMtrending_up1000 RPM2.5s每个请求都需要固定数量的词元,从 10000 个词元开始GET/POST
深度搜索https://deepsearch.jina.ai/v1/chat/completions推理、搜索和迭代以找到最佳答案block50 RPM500 RPM56.7s统计整个过程中词元的总数。POST
向量模型APIhttps://api.jina.ai/v1/embeddings将文本/图片转为定长向量block500 RPM & 1,000,000 TPMtrending_up2,000 RPM & 5,000,000 TPM
ssid_chart
取决于输入大小
help
以输入请求中的词元数量为准。POST
重排器 APIhttps://api.jina.ai/v1/rerank按查询对文档进行精排block500 RPM & 1,000,000 TPMtrending_up2,000 RPM & 5,000,000 TPM
ssid_chart
取决于输入大小
help
以输入请求中的词元数量为准。POST
分类器 APIhttps://api.jina.ai/v1/train使用训练样本训练分类器block20 RPM & 200,000 TPM60 RPM & 1,000,000 TPM
ssid_chart
取决于输入大小
词元计数为:输入词元 × 迭代次数POST
分类器 API (少量样本)https://api.jina.ai/v1/classify使用经过训练的少样本分类器对输入进行分类block20 RPM & 200,000 TPM60 RPM & 1,000,000 TPM
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取决于输入大小
词元计数为:输入词元POST
分类器 API (零样本)https://api.jina.ai/v1/classify使用零样本分类对输入进行分类block200 RPM & 500,000 TPM1,000 RPM & 3,000,000 TPM
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取决于输入大小
词元计数为:输入词元 加 标签词元POST
切分器 APIhttps://api.jina.ai/v1/segment对长文本进行分词分句20 RPM200 RPM1,000 RPM0.3s词元不计算使用量。GET/POST
API相关常见问题
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我可以对读取器、向量模型、重排器、分类器和微调模型 API 使用相同的 API 密钥吗?
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是的,同一个 API 密钥适用于 Jina AI 的所有搜索基础产品。这包括读取器、向量模型、重排器、分类器和微调模型 API,所有服务之间共享词元。
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我可以查看 API 密钥的词元使用情况吗?
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是的,您可以在“密钥和计费”选项卡中输入您的 API 密钥来查看词元最近的使用记录和剩余词元余额。如果您已登录 API 密钥控制面板,也可以在“管理 API 密钥”选项卡中查看这些详细信息。
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如果我忘记了 API 密钥,该怎么办?
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如果您遗失了充值密钥并希望找回,请使用您的注册电子邮件联系 support AT jina.ai 寻求帮助。建议登录以便于安全保存和便捷访问您的 API 密钥。
联系我们
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API 密钥会过期吗?
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不,我们的 API 密钥没有到期日期。但是,如果您怀疑您的密钥已被泄露并希望停用它,请联系我们的支持团队寻求帮助。您还可以在API 密钥控制面板中自助销毁您的密钥。
联系我们
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我可以在 API 密钥之间转移词元余额吗?
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是的,您可以将剩余的付费词元余额从一个高级密钥转移到另一个密钥。在API 密钥控制面板上登录您的帐户后,在该密钥的设置界面来转移所有剩余的付费词元余额。
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我可以销毁我的 API 密钥吗?
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是的,如果您认为您的 API 密钥已被泄露,您可以销毁该密钥。销毁密钥将立即为所有存储该密钥的用户禁用该密钥,并且所有剩余词元余额和关联资产将永久不可用。如果您拥有高级密钥,您可以选择在销毁之前将剩余的已付款词元余额转移到另一个密钥。请注意,此操作无法撤消。要销毁密钥,请前往API 密钥控制面板中的密钥设置。
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为什么有些机型第一次请求比较慢?
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这是因为我们的无服务器架构在使用率较低时会卸载某些模型。初始请求会激活或“预热”模型,这可能需要几秒钟。初始激活后,后续请求的处理速度会快得多。
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用户输入数据是否用于训练您的模型?
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我们遵守严格的隐私政策,不会使用用户输入数据来训练我们的模型。我们还符合 SOC 2 类型 I 和类型 II 标准,确保高标准的安全性和隐私性。
与计费相关的常见问题
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API是根据句子的数量或请求的数量计费吗?
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我们的定价模型基于处理的词元总数,允许用户灵活地在任意数量的句子中分配这些词元,为不同的文本分析需求提供经济高效的解决方案。
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新用户可以免费试用吗?
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我们为新用户提供免费试用,其中包含一千万个可用于我们任何模型的词元,并通过自动生成的 API 密钥进行兑换。免费词元用完后,用户可以通过“购买词元”标签页轻松购买额外的词元,用于 API 密钥。
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失败的请求是否会扣除词元?
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不,失败的请求不会扣除词元。
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接受哪些付款方式?
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付款通过 Stripe 处理,支持多种付款方式,包括信用卡、Google Pay 和 PayPal,为您提供方便。
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词元购买后可以开具发票吗?
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是的,购买词元后,发票将发送到与您的 Stripe 帐户关联的电子邮件地址。
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