models

OpenAI: Text Embedding 3 Large

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OpenAI: Text Embedding 3 Large

OpenAI’s larger third-generation text-embedding model returns 3,072-dimensional vectors by default, with a producer control for shorter representations. Use it for semantic retrieval, multilingual comparison and related-content or classification workflows.

About the model

This description covers the model’s capabilities. Available in Ailoot inputs, outputs and options are listed for the selected method below.

text-embedding-3-large is OpenAI’s larger third-generation text-embedding model for English and non-English tasks. It maps written material to a numerical vector, returning 3,072 components by default. The vector represents relationships in the supplied content; a retrieval or classification process uses it to select material or make another decision.

The third-generation models are trained to support shorter representations through the producer’s dimensions control. The maker gives 1,024 dimensions as an example when a vector store requires that size. A shorter vector reduces the amount of data to store and compare, while changing the representation can affect retrieval quality. Choose the size for the application’s requirements and use that same choice for the corpus and its queries.

An illustrative document-search workflow divides source material into meaningful passages, retains their identifiers and obtains vectors for each passage. A question is embedded using the same model and dimensions, then compared with the passage vectors. The application supplies filters, selects the ranked results and shows their source references. A subsequent text-generation model can develop an answer from the retrieved material; the embedding model’s result remains numerical data.

Other documented applications include code or text search, grouping similar records, related-content recommendations, classification, anomaly detection and measuring diversity in a collection. For a recommendation, describe the objects in the terms relevant to the relationship. For classification, compare against category representations or use vectors as features in a classifier. Define the rule that turns similarity into the result needed by the product.

OpenAI lists an 8,192-token maximum input per text. The embedding API accepts strings or tokenized text, supports multiple inputs and rejects empty strings. It also enforces a 300,000-token aggregate limit for one request. A long document should be divided with its meaningful boundaries and context intact, keeping each vector connected to its source passage.

The producer documents float vectors as the default output and base64 as an alternative encoding. The guide recommends cosine similarity and states that OpenAI embeddings are normalized to unit length, allowing a dot product for cosine similarity and equivalent rankings under Euclidean distance. If a third-generation vector is shortened manually after generation, the maker instructs the application to normalize the shortened vector again; using the dimensions control is the recommended route.

Prepare a consistent text representation and record the model, dimensions and source identifier. A useful final artifact is a ranked set of passages, related items or grouped records whose selection rule is explicit. Assess whether the result addresses the query and preserve the source evidence for the next stage, rather than treating vector similarity as verification of a record’s factual claims.

Ailoot Ultra · Embeddings POST /v1/embeddings openai/text-embedding-3-large

openai/text-embedding-3-large

OpenAI /openai/text-embedding-3-large
Model ID
  • openai/text-embedding-3-large
  • text-embedding-3-large

Overview

OpenAI’s larger third-generation text-embedding model returns 3,072-dimensional vectors by default, with a producer control for shorter representations. Use it for semantic retrieval, multilingual comparison and related-content or classification workflows.

Accepted inputs
Text · token_ids
Results
embedding

Available in Ailoot · inputs & methods

Ailoot Ultra · Embeddings POST /v1/embeddings
Input types
text, token_ids
Output types
embedding
Context
8,192 tokens
Output format
json
FieldTypeRequirementValues & limitsDefault
FieldmodelTypestringRequirementRequiredValues & limits
openai/text-embedding-3-large
Default—
FieldinputTypestring|string[]|integer[]|integer[][]RequirementRequiredValues & limits
Minimum items: 1
Conditions: Nonempty homogeneous batch. Token IDs are nonnegative integers.
Input budget: Maximum: 8,192 · Text unit: UTF8 bytes · Token unit: token-array elements
Default—
Fieldencoding_formatTypestringRequirementOptionalValues & limits
float
Defaultfloat
FielddimensionsTypeintegerRequirementNot supportedValues & limits
Minimum: 1
Default—
FielduserTypejson_valueRequirementOptionalValues & limits
Conditions: Source allows this JSON metadata field; exact upstream semantics are model-specific.
Default—
Fieldsession_idTypejson_valueRequirementOptionalValues & limits
Conditions: Source allows this JSON metadata field; exact upstream semantics are model-specific.
Default—
FieldtraceTypejson_valueRequirementOptionalValues & limits
Conditions: Source allows this JSON metadata field; exact upstream semantics are model-specific.
Default—
FieldproviderTypeobjectRequirementOptionalValues & limits
Conditions: provider.options rejected
Default—
Input material combinations

text_to_embedding

Method parameters and lifecycle
ParameterContract
Parametercontent_typeContractapplication/json
ParameterrequiredContractmodel, input
Parameterinput_shapesContractstring, string[], nonnegative_integer_token_array, nonnegative_integer_token_array[]
Parameterencoding_formatContractfloat
Parameterdimensions_overrideContractfalse
Parametermax_input_budget_unitsContract8192
Parametermultimodal_objectsContractfalse
Parametermaterial_typesContracttext, token_ids

Lifecycle: synchronous_json

Keep every vector index and dimension.

Multimodal model name does not admit image objects on this exact path.

Pricing

Tariff references do not add request options. Supported parameters are listed for the selected method.

Fast mode
Standard rate When fast mode is selected
Flex mode
Standard rate When flex mode is selected
Maximum reasoning effort
Standard rate When maximum reasoning effort uses the default adjustment

Ailoot rates

Prices by configuration

ConfigurationRate scheduleCharge
ConfigurationBase token ratesRate scheduleBase rateCharge
Input · Input tokens $0.00026 / 1K tokens
Output · Output tokens $0 / 1K tokens
Input · Cache read — / 1K tokens
Input · Cache write — / 1K tokens
Input · Cache write, 1 hour — / 1K tokens

Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. How reservation and settlement work →

Example requests

Ailoot Ultra · Embeddings

curlPython SDK
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
python3 - <<'PY_REQUEST'
import json,os
from pathlib import Path
p=json.loads('{"model": "openai/text-embedding-3-large", "input": ["First document", "Second document"]}')

Path("request.json").write_text(json.dumps(p,ensure_ascii=False))
PY_REQUEST
curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/embeddings \
  -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \
  --data-binary @request.json -D response-headers.txt -o result.json
python3 - <<'PY_RESULT'
import json
from pathlib import Path
r=json.loads(Path("result.json").read_text())
for x in r.get("data",[]): print(json.dumps({"index":x.get("index"),"embedding":x.get("embedding")}))
PY_RESULT
from openai import OpenAI
import os

client=OpenAI(base_url="https://api.ailoot.ai/v1",api_key=os.environ["AILOOT_API_KEY"],max_retries=0)
result=client.embeddings.create(model='openai/text-embedding-3-large',input=["First document","Second document"])
print(result)
for item in result.data:print(item.index,item.embedding)

Receive and save results

Ailoot Ultra · Embeddings

json

Keep all completed results

Keep every complete returned response, file and content part.

Keep every vector with its index. Vector count must equal input count; dimensions must be consistent.

If the original response needs checking

No embedding job endpoint is introduced.

Response fields
FieldType
FieldobjectTypestring
FieldmodelTypestring
Fielddata[].indexTypeinteger
Fielddata[].embeddingTypefinite float[]
FieldusageTypeobject
Errors and next steps
ResponseConditionNext step
Response400 · invalid_request_errorConditionInvalid required fields, material representation or parameter valueNext stepCorrect the indicated fields before a new creation request.

Aliases

Model aliases

Ailoot Ultra openai/text-embedding-3-large, text-embedding-3-large

Method path aliases

Use the method paths shown above.

Related caller IDs

openai/text-embedding-3-large, text-embedding-3-large

Ailoot Ultra · Embeddings · text-embedding-3-large POST /v1/embeddings text-embedding-3-large

text-embedding-3-large

OpenAI /text-embedding-3-large
Model ID
  • openai/text-embedding-3-large
  • text-embedding-3-large

Overview

OpenAI’s larger third-generation text-embedding model returns 3,072-dimensional vectors by default, with a producer control for shorter representations. Use it for semantic retrieval, multilingual comparison and related-content or classification workflows.

Accepted inputs
Text
Results
embedding

Available in Ailoot · inputs & methods

Ailoot Ultra · Embeddings · text-embedding-3-large POST /v1/embeddings
Input types
text
Output types
embedding
Context
8,192 tokens
Output format
json
FieldTypeRequirementValues & limitsDefault
FieldmodelTypestringRequirementRequiredValues & limits
text-embedding-3-large
Default—
FieldinputTypestring|string[]|integer[]|integer[][]RequirementRequiredValues & limits
Minimum items: 1
Conditions: Nonempty homogeneous batch. Token IDs are nonnegative integers.
Input budget: Maximum: 8,192 · Text unit: UTF8 bytes · Token unit: token-array elements
Default—
Fieldencoding_formatTypestringRequirementOptionalValues & limits
float
Defaultfloat
FielddimensionsTypeintegerRequirementNot supportedValues & limits
Minimum: 1
Default—
FielduserTypejson_valueRequirementOptionalValues & limits
Conditions: Optional JSON metadata; exact upstream semantics depend on the selected model.
Default—
Fieldsession_idTypejson_valueRequirementOptionalValues & limits
Conditions: Optional JSON metadata; exact upstream semantics depend on the selected model.
Default—
FieldtraceTypejson_valueRequirementOptionalValues & limits
Conditions: Optional JSON metadata; exact upstream semantics depend on the selected model.
Default—
FieldproviderTypeobjectRequirementOptionalValues & limits
Conditions: provider.options rejected
Default—
Input material combinations

text_to_embedding

Method parameters and lifecycle
ParameterContract
Parametercontent_typeContractapplication/json
ParameterrequiredContractmodel, input
Parameterinput_shapesContractstring, string[], nonnegative_integer_token_array, nonnegative_integer_token_array[]
Parameterencoding_formatContractfloat
Parameterdimensions_overrideContractfalse
Parametermax_input_budget_unitsContract8192
Parametermultimodal_objectsContractfalse
Parametermaterial_typesContracttext
Parametertext_file_materialContractRead the actual UTF-8 document and put its text in the indicated input or message content string.

Lifecycle: synchronous_json

Send the exact model ID and required fields.

Keep every returned item and its original identifiers.

Pricing

Tariff references do not add request options. Supported parameters are listed for the selected method.

Fast mode
Standard rate When fast mode is selected
Flex mode
Standard rate When flex mode is selected
Maximum reasoning effort
Standard rate When maximum reasoning effort uses the default adjustment

Ailoot rates

Prices by configuration

ConfigurationRate scheduleCharge
ConfigurationBase token ratesRate scheduleBase rateCharge
Input · Input tokens $0.00026 / 1K tokens
Output · Output tokens $0 / 1K tokens
Input · Cache read — / 1K tokens
Input · Cache write — / 1K tokens
Input · Cache write, 1 hour — / 1K tokens

Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. How reservation and settlement work →

Example requests

Ailoot Ultra · Embeddings · text-embedding-3-large

Complete minimal JSON bodycurl · use your UTF-8 documentPython · save the complete result
{
  "model": "text-embedding-3-large",
  "input": [
    "First document",
    "Second document"
  ],
  "encoding_format": "float"
}
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
: "${AILOOT_TEXT_FILE:?Set your actual UTF-8 document}"
export AILOOT_TEXT_FILE
python3 - <<'PY_REQUEST'
import json, os
from pathlib import Path

source_file = Path(os.environ['AILOOT_TEXT_FILE'])
if not source_file.is_file():
    raise SystemExit('Set AILOOT_TEXT_FILE to your actual UTF-8 document')
text = source_file.read_text(encoding='utf-8')
if not text.strip():
    raise SystemExit('Choose a document containing text')
payload = {'model': 'text-embedding-3-large', 'input': ['First document', 'Second document'], 'encoding_format': 'float'}
payload['input'] = [text]
Path('request.json').write_text(json.dumps(payload, ensure_ascii=False), encoding='utf-8')
PY_REQUEST
curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/embeddings \
  -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \
  --data-binary @request.json -D response-headers.txt -o result.json
python3 - <<'PY_RESULT'
import json
from pathlib import Path

result = json.loads(Path('result.json').read_text(encoding='utf-8'))
print(json.dumps(result, ensure_ascii=False, indent=2))
for vector in result.get('data', []):
    print('Vector', vector.get('index'), json.dumps(vector.get('embedding')))
PY_RESULT
import json, os
from pathlib import Path

source_file = Path(os.environ['AILOOT_TEXT_FILE'])
if not source_file.is_file():
    raise SystemExit('Set AILOOT_TEXT_FILE to your actual UTF-8 document')
text = source_file.read_text(encoding='utf-8')
if not text.strip():
    raise SystemExit('Choose a document containing text')
payload = {'model': 'text-embedding-3-large', 'input': ['First document', 'Second document'], 'encoding_format': 'float'}
payload['input'] = [text]
from urllib.request import Request, urlopen
from urllib.error import HTTPError

api_key = os.environ['AILOOT_API_KEY']
if not api_key.strip():
    raise SystemExit('Set AILOOT_API_KEY before making a request')
headers = {'Authorization': 'Bearer PLACEHOLDER_KEY', 'Content-Type': 'application/json'}
headers['Authorization'] = 'Bearer ' + api_key
request = Request('https://api.ailoot.ai/v1/embeddings', data=json.dumps(payload, ensure_ascii=False).encode('utf-8'), headers=headers, method='POST')
try:
    with urlopen(request, timeout=120) as response:
        raw = response.read()
        Path('response-headers.txt').write_text(str(response.headers), encoding='utf-8')
except HTTPError as error:
    Path('result.json').write_bytes(error.read())
    Path('response-headers.txt').write_text(str(error.headers), encoding='utf-8')
    raise
Path('result.json').write_bytes(raw)
import json
from pathlib import Path

result = json.loads(Path('result.json').read_text(encoding='utf-8'))
print(json.dumps(result, ensure_ascii=False, indent=2))
for vector in result.get('data', []):
    print('Vector', vector.get('index'), json.dumps(vector.get('embedding')))

Receive and save results

Ailoot Ultra · Embeddings · text-embedding-3-large

json

Keep all completed results

Keep every complete returned response, file and content part.

Keep every finite vector with its original index. Preserve all dimensions and the complete usage object.

If the original response needs checking

No embedding job endpoint is introduced.

Response fields
FieldType
FieldobjectTypestring
FieldmodelTypestring
Fielddata[].indexTypeinteger
Fielddata[].embeddingTypefinite float[]
FieldusageTypeobject
Errors and next steps
ResponseConditionNext step
Response400 · invalid_request_errorConditionInvalid required fields, material representation or parameter valueNext stepCorrect the indicated fields before a new creation request.

Aliases

Model aliases

Ailoot Ultra openai/text-embedding-3-large, text-embedding-3-large

Method path aliases

Use the method paths shown above.

Related caller IDs

openai/text-embedding-3-large, text-embedding-3-large

FAQ · OpenAI: Text Embedding 3 Large
What inputs and results are available?

POST /v1/embeddings · openai/text-embedding-3-large: text, token_ids → embedding

POST /v1/embeddings · text-embedding-3-large: text → embedding

Which fields does the request use?

POST /v1/embeddings · openai/text-embedding-3-large: model, input, encoding_format, provider

POST /v1/embeddings · text-embedding-3-large: model, input, encoding_format, provider

What limits apply?

POST /v1/embeddings · openai/text-embedding-3-large: ctx: 8192; input.budget.maximum: 8192 (UTF8 bytes); input.min_items: 1

POST /v1/embeddings · text-embedding-3-large: ctx: 8192; input.budget.maximum: 8192 (UTF8 bytes); input.min_items: 1

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