Anthropic: Claude Opus 4.7 (Fast)

anthropic/claude-opus-4.7-fast · AnthropicUnmeasurable

Declared family: Claude
Evidence confidence: Unknown
Declared tokenizer tag: Claude
Entered catalogue: 12 May 2026
Last tested: Not yet measured
Measurement: Deferred: measurement cost above the per-model cap

Evidence stack

Signals of different kinds, weighed together

Signal	Result	Reference
Tokenizer signature	Not measured	–
API surface	Identical contract to 1 other entry	api_b57d98be
Context and output	1,000,000 context · 128,000 max output	declared
Reasoning contract	Optional · efforts max, xhigh, high, medium, low · default high	declared
Serving providers observed	None recorded yet	–

Declared record

What the catalogue claims about this model

Fast-mode variant of [Opus 4.7](/anthropic/claude-opus-4.7) - identical capabilities with higher output speed at premium 6x pricing. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode

Modalities: text+image+file->text
Declared tokenizer: Claude
Prompt price: $30.0 / M tokens
Completion price: $150 / M tokens

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstool_choicetoolsverbosity

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

12 May 2026Enters the OpenRouter catalogue declared as Claude.

Cite this page as the evidence record for Anthropic: Claude Opus 4.7 (Fast): the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings. The raw data behind every figure is on the data page.