Anthropic: Claude Opus Latest

~anthropic/claude-opus-latest · AnthropicUnmeasurable

Declared family: Router
Declared tokenizer tag: Router
Entered catalogue: 21 April 2026
Measurement: Excluded: a router, not one stable model
Evidence confidence: Unknown

This catalogue entry is an alias: a name that points at another model rather than a model of its own. Its serving contract is listed below; the identity evidence lives on the record of the model it serves.

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	Set up identically to 3 other listings, field for field	api_2aa953b6
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	Always reasons, and cannot be turned off, at max, xhigh, high, medium, low, high by default	its own listing

Declared record

What the catalogue claims about this model

This model always redirects to the latest model in the Claude Opus family.

Modalities: text+image+file->text
Declared tokenizer: Router
Prompt price: $4.00 / M tokens
Completion price: $20.0 / M tokens

Supported parameters

include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstemperaturetool_choicetoolsverbosity

defaults: {}

Catalogue entry

History

Every observation, kept as taken

21 April 2026Enters the OpenRouter catalogue declared as Router.