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Grok 4.5

Massive Colossus-Trained MoE
Official Source & Paper
xAI logo xAI 📄 Proprietary API / X Premium 🌍 United States (US) 🗓️ Effective Date: 22.09.2026

Trained on the Colossus 200k GPU cluster in Memphis, Grok 4.5 integrates real-time world telemetry, uncensored analysis, and deep math reasoning.

Model Size / Parameters Proprietary (>800B MoE) Architecture: Massive Colossus-Trained MoE
Context Window (Input) 500k tokens Token Capacity
Max Output Tokens 64k tokens Single Generation Limit
Supported Modalities Text, Code, Vision, Real-Time Data Native Multimodal Ingestion
License & Access Proprietary API / X Premium Open Weights vs. API
Release Date September 2026 Effective Date: 22.09.2026

Verified Benchmark Results

Standardized academic and industry evaluation benchmarks (Effective Date: 22.09.2026).

MMLU-Pro / 5-Shot General Intellect
93.2%
SWE-bench Verified Software Engineering
68.9%
MATH 500 / AIME Mathematical Reasoning
95.5%
GPQA Diamond Doctoral Science
80.0%
HumanEval / Python Algorithm Synthesis
94.2%

Pricing & Cost Efficiency

Official API token pricing and self-hosted licensing terms.

Input Pricing (Prompt)
$4.00 / 1M tokens
Per 1 million processed tokens
Output Pricing (Generation)
$16.00 / 1M tokens
Per 1 million generated tokens
Verified Datasheet: Source: xAI Research Documentation • Effective Date: 22.09.2026
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Latest Coverage & Analysis on Grok 4.5