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Grok 4.5

xAIfamily · Grokdocs.x.ai/developers/models/grok-4.5

Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM.

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data quality69

Updated 5 h ago · first seen 11 Sept 2026

model_01M294WVVWY3VBKBXRMAT2KYXT

Overview

Identity

Identity block not returned by the API for this entity.

Openness

Openness not classified yet — no sourced evidence to place this model in the ontology.

Key facts

Release date

Source:OpenRouter public model & pricing listingT2observed 12 h agomedium

Official page
docs.x.ai/developers/models/grok-4.5

Source:xAI — docsT1observed 10 h agohigh

API model id

Source:xAI — docsT1observed 10 h agohigh

Openrouter id

Source:OpenRouter public model & pricing listingT2observed 12 h agomedium

Architecture

Tokenizer

Source:OpenRouter public model & pricing listingT2observed 12 h agomedium

Capabilities

Modalities

Modalities
imagetext
Input
textimage
Output
text

Capabilities

  • Tool calling

    Yes

    OpenRouter public model & pricing listing · T2

  • Structured output

    Yes

    OpenRouter public model & pricing listing · T2

  • Reasoning

    Yes

    OpenRouter public model & pricing listing · T2

  • Vision

    Yes

    OpenRouter public model & pricing listing · T2

  • Audio

    Unavailable

  • Fine-tuning available

    Unavailable

Context window

Source:OpenRouter public model & pricing listingT2observed 12 h agomedium

Max output

Source:OpenRouter public model & pricing listingT2observed 12 h agomedium

Tokenizer

Source:OpenRouter public model & pricing listingT2observed 12 h agomedium

Benchmarks15

Compare with another model →

Comparable same task and conditions · Partially comparable same task, conditions differ (effort, temperature, judge) · Not comparable different variant or metric

No benchmark results recorded

Results appear when a tier 1–3 source publishes them; we never copy scores without a source.

Providers & Pricing2

All offers in the price terminal →
Current prices per 1M tokens
ProviderInput / 1MOutput / 1MCached inBatch in / outContextObservedSource
xAI APIgrok-4.5$2$6$0.30—500K4 h agodocs.x.aiT1
xAI APIx-ai/grok-4.5$2$6$0.30—500K4 h agoopenrouter.aiT2

USD per 1M tokens as published by each provider (USD). Rows are append-only: every change is kept in the history below.

Price history

Step lines per provider; amber markers are recorded changes. Click a marker or a row for the evidence behind that price.

Output price · USD / 1M tokens 1 provider

Output price history of Grok 4.5$0$2$4$6$8Sept 26Sept 26Sept 26Sept 26Sept 26Sept 26Sept 26Sept 26xAI API: first observed → $6 · 11 Sept 2026
  • xAI API
  • xAI APIfirst observed $611 Sept 2026

Input price · USD / 1M tokens 1 provider

Input price history of Grok 4.5$0$0.50$1$1.5$2$2.5Sept 26Sept 26Sept 26Sept 26Sept 26Sept 26Sept 26Sept 26xAI API: first observed → $2 · 11 Sept 2026
  • xAI API
  • xAI APIfirst observed $211 Sept 2026

Timeline19

Full timeline →

Change history25

Temporal, append-only claims: a new observation closes the previous claim instead of overwriting it. Rewind the record with the as-of picker.

Viewing AI Atlas as of 12 Sept 2026 — attributes exactly as the atlas knew them on that day; later corrections are not shown.

Back to today →

Attributes as of 12 Sept 2026 27 claims in force

Family
Grok
Release date
8 Jul 2026
Openness
proprietary
Context window
500K tokens
Max output
450K tokens
Modalities
image, text
Input modalities
text, image
Output modalities
text
Tokenizer
Grok
API model id
grok-4.5
Aa context window
500,000
Aa openness
proprietary
Batch api
No
File input
Yes
Aa median output tokens per second
54.8
Openrouter id
x-ai/grok-4.5
Openrouter listed at
8 Jul 2026
Reasoning
Yes
Reasoning effort options
low, medium, high, xhigh
Regions
us-east-1, us-west-2
Structured output
Yes
Supported parameters
include_reasoning, logprobs, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, temperature, tool_choice, tools, top_logprobs, top_p
Tool calling
Yes
Vision
Yes
Weights available
No
25 claims · 23 properties1 conflicting

Familyfamily1

Claim history for Family
ValueValid from → toStatusSourceConfidenceExtractor
Grok → currentcurrentxAI — docsT1highdeterministic

Release daterelease_date1

Claim history for Release date
ValueValid from → toStatusSourceConfidenceExtractor
8 Jul 2026 → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Opennessopenness1

Claim history for Openness
ValueValid from → toStatusSourceConfidenceExtractor
proprietary → currentcurrentArtificial AnalysisT2mediumdeterministic

Context windowcontext_length1

Claim history for Context window
ValueValid from → toStatusSourceConfidenceExtractor
500K tokens → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Max outputmax_output_tokens1

Claim history for Max output
ValueValid from → toStatusSourceConfidenceExtractor
450K tokens → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Modalitiesmodalities1

Claim history for Modalities
ValueValid from → toStatusSourceConfidenceExtractor
image, text → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Input modalitiesmodalities_input3conflicting claims

Claim history for Input modalities
ValueValid from → toStatusSourceConfidenceExtractor
image, text → currentconflictingOpenRouter public model & pricing listingT2mediumdeterministic
text, image → currentcurrentxAI — docsT1conflicteddeterministic
image, text → supersededOpenRouter public model & pricing listingT2mediumdeterministic

Output modalitiesmodalities_output1

Claim history for Output modalities
ValueValid from → toStatusSourceConfidenceExtractor
text → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Tokenizertokenizer1

Claim history for Tokenizer
ValueValid from → toStatusSourceConfidenceExtractor
Grok → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

API model idapi_model_id1

Claim history for API model id
ValueValid from → toStatusSourceConfidenceExtractor
grok-4.5 → currentcurrentxAI — docsT1highdeterministic

Official pageofficial_url1

Claim history for Official page
ValueValid from → toStatusSourceConfidenceExtractor
https://docs.x.ai/developers/models/grok-4.5 → currentcurrentxAI — docsT1highdeterministic

Batch apibatch_api1

Claim history for Batch api
ValueValid from → toStatusSourceConfidenceExtractor
No → currentcurrentxAI — docsT1highdeterministic

Descriptiondescription1

Claim history for Description
ValueValid from → toStatusSourceConfidenceExtractor
Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM. → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

File inputfile_input1

Claim history for File input
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Aa median output tokens per secondmetric.aa_median_output_tokens_per_second1

Claim history for Aa median output tokens per second
ValueValid from → toStatusSourceConfidenceExtractor
54.8 → currentcurrentArtificial AnalysisT2mediumdeterministic

Openrouter idopenrouter_id1

Claim history for Openrouter id
ValueValid from → toStatusSourceConfidenceExtractor
x-ai/grok-4.5 → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Reasoningreasoning1

Claim history for Reasoning
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Reasoning effort optionsreasoning_effort_options1

Claim history for Reasoning effort options
ValueValid from → toStatusSourceConfidenceExtractor
low, medium, high, xhigh → currentcurrentxAI — docsT1highdeterministic

Regionsregions1

Claim history for Regions
ValueValid from → toStatusSourceConfidenceExtractor
us-east-1, us-west-2 → currentcurrentxAI — docsT1highdeterministic

Structured outputstructured_output1

Claim history for Structured output
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Supported parameterssupported_parameters1

Claim history for Supported parameters
ValueValid from → toStatusSourceConfidenceExtractor
include_reasoning, logprobs, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, temperature, tool_choice, tools, top_logprobs, top_p → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Tool callingtool_calling1

Claim history for Tool calling
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Visionvision1

Claim history for Vision
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Claims are temporal and append-only: a new observation closes the previous claim (valid_to) instead of overwriting it. Conflicting claims from different sources are kept side by side and flagged — never averaged. Methodology →

Provenance

Attributed facts

24

Source tiers

T1T27 / 17

Freshest observation

5 h ago

Conflicts

2 flagged

Source documents 5

Source documents
SourceDocumentTypeTierLast observedSnapshots
xAI — docsdocs.x.ai/developers/models/grok-4.5.md model_pageT1· Official4 h ago1
xAI — docsdocs.x.ai/developers/models model_docsT1· Official4 h ago5
OpenRouter public model & pricing listingopenrouter.ai/api/v1/models catalogueT2· Quality secondary4 h ago6
LiveBenchlivebench.ai/table_2026_06_25.csv leaderboardT2· Quality secondary10 h ago1
Artificial Analysisartificialanalysis.ai/leaderboards/models leaderboardT2· Quality secondary10 h ago1

Tier 1 = official/primary, 2 = quality secondary, 3 = community, 4 = unverified. Every snapshot is archived; see all sources and the methodology.

Data quality (69/100) measures how well AI Atlas knows this entity — completeness, primary-source ratio, freshness, conflicts — never how good the model is. Methodology →