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SpaceXAI: Grok 4.3 (batch)

x-ai/grok-4.3:batch · xAIDeclared and measured agree

Tokenizer lineage (measured): Grok
Evidence confidence: High
Declared tokenizer tag: Grok
Entered catalogue: 30 April 2026
Last tested: Not yet measured
Measurement: Awaiting measurement

Evidence

✓ inherited from x-ai/grok-4.3: a serving variant shares its base model's tokenizer

Compare with SpaceXAI: Grok 4.3

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This entry is a serving variant of SpaceXAI: Grok 4.3. 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

SpaceXAI: Grok 4.3 (batch) is xAI's model. Its measured tokenizer sits with the Grok group, which is evidence that it builds on the Grok tokenizer. Tokenizer reuse is normal engineering, open vocabularies travel between labs, and this says nothing against xAI's authorship of the model itself.

Evidence stack

Signals of different kinds, weighed together

Signal	Result	Reference
Tokenizer signature	Not measured	–
API surface	Identical contract to 1 other entry	api_0a66d657
Context and output	1,000,000 context · 900,000 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: $1.00 / M tokens
Completion price: $2.00 / 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 (batch): the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings.