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xAI: Grok 4.5

x-ai/grok-4.5

Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.

Source-linkedClosed weights
Report data
Context window500K
Maximum outputNot documented
Provider offers0
Knowledge cutoffUndisclosed
Capabilities

What this model supports

ReasoningNo
Tool callingNo
Structured outputNo
AttachmentsNo
Temperature controlNo
Open weightsNo
Creator
xAI
Family
Not documented
Modalities
File, Image, Text
License
Not documented
Release date
Not documented
Model ID
x-ai/grok-4.5
Market availability

Provider pricing

Report price →
No known providers available.
Evidence

Published benchmark results

Agentic Index vs top 7 models
GPT-5.6 Sol
54.0
Claude Fable 5
52.8
GPT-5.6 Terra
47.4
Anthropic: Claude Opus 4.8
47.2
Claude Sonnet 5
46.7
xAI: Grok 4.5
45.7
GPT-5.6 Luna
45.6
Coding Index vs top 7 models
GPT-5.6 Sol
77.4
GPT-5.6 Terra
76.7
Claude Fable 5
76.5
GPT-5.5
74.9
Anthropic: Claude Opus 4.8
74.3
Anthropic: Claude Opus 4.7
73.6
xAI: Grok 4.5
72.4
Design Arena: 3d vs top 7 models
Z.ai: GLM 5.2
1371.0
Claude Fable 5
1361.0
xAI: Grok 4.5
1352.0
Kimi K2.6
1348.0
Anthropic: Claude Opus 4.6
1348.0
Z.ai: GLM 5.1
1336.0
DeepSeek V4 Pro
1326.0
Design Arena: codecategories vs top 7 models
Z.ai: GLM 5.2
1352.0
Claude Fable 5
1344.0
Anthropic: Claude Opus 4.6
1336.0
Anthropic: Claude Opus 4.7
1330.0
xAI: Grok 4.5
1328.0
Z.ai: GLM 5.1
1321.0
Kimi K2.6
1320.0
Design Arena: dataviz vs top 7 models
Claude Fable 5
1372.0
Z.ai: GLM 5.1
1366.0
xAI: Grok 4.5
1330.0
Anthropic: Claude Opus 4.6
1321.0
Anthropic: Claude Opus 4.7
1320.0
Z.ai: GLM 5.2
1318.0
Anthropic: Claude Sonnet 4.6
1317.0
Design Arena: webapps vs top 7 models
Claude Sonnet 5
1351.0
Claude Fable 5
1338.0
Anthropic: Claude Opus 4.7
1326.0
Anthropic: Claude Opus 4.8
1288.0
Z.ai: GLM 5.2
1280.0
xAI: Grok 4.5
1270.0
Qwen: Qwen3.7 Max
1267.0
Design Arena: website vs top 7 models
Z.ai: GLM 5.2
1346.0
Claude Fable 5
1336.0
Anthropic: Claude Opus 4.6
1331.0
Anthropic: Claude Opus 4.7
1329.0
xAI: Grok 4.5
1323.0
Anthropic: Claude Sonnet 4.6
1320.0
Claude Sonnet 5
1314.0
Intelligence Index vs top 7 models
Claude Fable 5
59.9
GPT-5.6 Sol
58.9
Anthropic: Claude Opus 4.8
55.7
GPT-5.6 Terra
55.0
GPT-5.5
54.8
xAI: Grok 4.5
53.8
Anthropic: Claude Opus 4.7
53.5