SpaceXAI: Grok 4.3

x-ai/grok-4.3 · xAINot yet established

Declared family: Grok
Evidence confidence: Unknown
Declared tokenizer tag: Grok
Entered catalogue: 30 April 2026
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_65030a74
Context and output	1,000,000 context · – max output	declared
Reasoning contract	Optional · efforts high, medium, low, none · default low	declared
Serving providers observed	None recorded yet	–

Declared record

What the catalogue claims about this model

Grok 4.3 is a reasoning model from SpaceXAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...

Modalities: text+image+file->text
Declared tokenizer: Grok
Prompt price: $1.25 / M tokens
Completion price: $2.50 / M tokens

Supported parameters

include_reasoninglogprobsmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_logprobstop_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

30 April 2026Enters the OpenRouter catalogue declared as Grok.

Cite this page as the evidence record for SpaceXAI: Grok 4.3: 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.