DeepSeek: R1 0528

deepseek/deepseek-r1-0528 · DeepSeekNot yet established

Declared family: DeepSeek
Evidence confidence: Unknown
Declared tokenizer tag: DeepSeek
Entered catalogue: 28 May 2025
Last tested: Not yet measured
Measurement: Awaiting measurement

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_7ea3cb80
Context and output	163,840 context · 32,768 max output	declared
Reasoning contract	Mandatory	declared
Serving providers observed	None recorded yet	–

Declared record

What the catalogue claims about this model

May 28th update to the [original DeepSeek R1](/deepseek/deepseek-r1) Performance on par with [OpenAI o1](/openai/o1), but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active...

Modalities: text->text
Declared tokenizer: DeepSeek
Prompt price: $0.50 / M tokens
Completion price: $2.15 / M tokens

Supported parameters

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_ppresence_penaltyreasoningrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

defaults: {"temperature":null,"top_p":null,"frequency_penalty":null}

Catalogue entry Weights on Hugging Face

History

Every observation, kept as taken

28 May 2025Enters the OpenRouter catalogue declared as DeepSeek.

Cite this page as the evidence record for DeepSeek: R1 0528: 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.