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Anthropic: Claude Haiku 5.5 (batch)

anthropic/claude-haiku-5.5:batch · AnthropicDeclared and measured agree

Tokenizer lineage (measured): Claude
Declared tokenizer tag: Claude
Entered catalogue: 7 October 2026
Measurement: Variant: inherits its base model’s measurement
Evidence confidence: High

Why high: inherited from anthropic/claude-haiku-5.5: a serving variant shares its base model's tokenizer.

Evidence

✓ inherited from anthropic/claude-haiku-5.5: a serving variant shares its base model's tokenizer

Compare with Anthropic: Claude Haiku 5.5

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This entry is a serving variant of Anthropic: Claude Haiku 5.5. 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 5.5 (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.

What we checked

Four different kinds of evidence, and what each one showed

We checked	What we found	Where it came from
How it counts tokens	Not measured yet	we measured it
How its API is set up	A combination of settings no other listing in the catalogue uses	api_f4938a8a
How much it can read and write	Reads up to 1,000,000 tokens at once, writes up to 128,000	its own listing
Whether it thinks before answering	Reasons when asked to, at max, xhigh, high, medium, low, medium by default	its own listing

Declared record

What the catalogue claims about this model

Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding, computer use, and...

Modalities: text+image+file->text
Declared tokenizer: Claude
Prompt price: $0.05 / M tokens
Completion price: $0.25 / M tokens

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstool_choicetoolsverbosity

defaults: {}

Catalogue entry

History

Every observation, kept as taken

7 October 2026Enters the OpenRouter catalogue declared as Claude.