Anthropic: Claude Haiku 4.5 (batch)

anthropic/claude-haiku-4.5:batch · AnthropicDeclared and measured agree

Tokenizer lineage (measured): Claude
Evidence confidence: High
Declared tokenizer tag: Claude
Entered catalogue: 15 October 2025
Last tested: Not yet measured
Measurement: Variant: inherits its base model’s measurement

Evidence

✓ inherited from anthropic/claude-haiku-4.5: a serving variant shares its base model's tokenizer

Compare with Anthropic: Claude Haiku 4.5

This entry is a serving variant of Anthropic: Claude Haiku 4.5. 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

Anthropic: Claude Haiku 4.5 (batch) is Anthropic's model. Its measured tokenizer sits with the Claude group, which is evidence that it builds on the Claude tokenizer. Tokenizer reuse is normal engineering, open vocabularies travel between labs, and this says nothing against Anthropic's authorship of the model itself.

Evidence stack

Signals of different kinds, weighed together

Signal	Result	Reference
Tokenizer signature	Not measured	–
API surface	No other entry shares this exact contract	api_eae12250
Context and output	200,000 context · 64,000 max output	declared
Reasoning contract	Optional	declared
Serving providers observed	None recorded yet	–

Declared record

What the catalogue claims about this model

Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models. Matching Claude Sonnet 4’s performance...

Modalities: text+image+file->text
Declared tokenizer: Claude
Prompt price: $0.50 / M tokens
Completion price: $2.50 / M tokens

Supported parameters

include_reasoningmax_tokensreasoningresponse_formatstopstructured_outputstemperaturetool_choicetoolstop_ktop_p

defaults: {"temperature":null,"top_p":null,"top_k":null,"frequency_penalty":null,"presence_penalty":null,"repetition_penalty":null}

Catalogue entry

History

Every observation, kept as taken

15 October 2025Enters the OpenRouter catalogue declared as Claude.

Cite this page as the evidence record for Anthropic: Claude Haiku 4.5 (batch): the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings.