Grok 4.5

xAI's fastest, most token-efficient frontier model yet, tuned on real coding-agent data.

Intelligence

AA Intelligence Index54

independent benchmark score from Artificial Analysis, not Timace's own judgment

Best for

  • Coding and agentic workflows at a lower cost than Opus-class models

Specifications

Developer
xAI

confidence 100%

x.ai

Verified Jul 21, 2026 · curated

Context window (tokens)
500K tokens

confidence 80%

x.ai

Verified Jul 21, 2026 · curated

Input $/MTok
$2 / MTok

confidence 80%

x.ai

Verified Jul 21, 2026 · curated

Output $/MTok
$6 / MTok

confidence 80%

x.ai

Verified Jul 21, 2026 · curated

Modalities
text, image, code

confidence 85%

x.ai

Verified Jul 21, 2026 · curated

API available
Yes

confidence 95%

x.ai

Verified Jul 21, 2026 · curated

Open source
No

confidence 95%

x.ai

Verified Jul 21, 2026 · curated

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