OpenAI: GPT-3.5 Turbo (batch)

openai/gpt-3.5-turbo:batch · OpenAIDeclared and measured agree

Tokenizer lineage (measured): OpenAI cl100k
Evidence confidence: High
Declared tokenizer tag: GPT
Entered catalogue: 28 May 2023
Last tested: Not yet measured
Measurement: Variant: inherits its base model’s measurement

Evidence

✓ inherited from openai/gpt-3.5-turbo: a serving variant shares its base model's tokenizer

This entry is a serving variant of OpenAI: GPT-3.5 Turbo. A variant shares its base model's tokenizer by construction, so the measurement lives on the base record and this page inherits it.

Identity statement

OpenAI: GPT-3.5 Turbo (batch) is OpenAI's model, and its measured tokenizer sits in OpenAI's own signature group alongside its sibling models. No other maker's measured model shares it so far.

Whose vocabulary this is

Tokenizer: cl100k_base
Origin of tokenizer: OpenAI tiktoken, open source
Model maker: OpenAI

cl100k_base is an open vocabulary table anyone can build on. Sharing it says which dictionary the model reads with, and nothing about who made the model.

Evidence stack

Signals of different kinds, weighed together

Signal	Result	Reference
Tokenizer signature	Not measured	–
API surface	Identical contract to 1 other entry	api_e35a478b
Context and output	16,385 context · 4,096 max output	declared
Reasoning contract	None declared	declared
Serving providers observed	None recorded yet	–

Declared record

What the catalogue claims about this model

GPT-3.5 Turbo is OpenAI's fastest model. It can understand and generate natural language or code, and is optimized for chat and traditional completion tasks. Training data up to Sep 2021.

Modalities: text->text
Declared tokenizer: GPT
Prompt price: $0.25 / M tokens
Completion price: $0.75 / M tokens

Supported parameters

frequency_penaltylogit_biaslogprobsmax_tokenspresence_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_logprobstop_p

defaults: {}

Catalogue entry

History

Every observation, kept as taken

28 May 2023Enters the OpenRouter catalogue declared as GPT.

Cite this page as the evidence record for OpenAI: GPT-3.5 Turbo (batch): the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings.