Grok 4.5

Released July 8, 2026. Grok 4.5 is xAI's coding and agentic flagship, built on the 1.5-trillion-parameter V9 mixture-of-experts foundation. It is described as 'Opus-class, but faster' and is highly token-efficient, with a 500K-token context and tiered pricing above 200K.

Grok 4.5 strengths

• Opus-class reasoning at high token efficiency
• Built for coding and agentic tasks
• Real-time X and web search built in
• Configurable low / medium / high reasoning
• OpenAI-compatible Responses and Chat APIs

Pricing & context

Cost guide: a typical call of about 10K input + 2K output tokens costs roughly $0.032 at list prices. Note: prompts above 200K tokens are billed at the higher $4.00 / $12.00 per 1M tier.

When to choose Grok 4.5

Grok 4.5 is best for Opus-class reasoning and agentic coding with high token efficiency and real-time data. If you want the previous xAI flagship with a larger context, compare it with Grok 4.3.

Grok 4.5 FAQ

How much does Grok 4.5 cost?

Grok 4.5 is priced at $2.00 per 1M input tokens ($0.50 cached) and $6.00 per 1M output tokens for prompts up to 200K, rising to $4.00 / $12.00 above 200K, with a 500K-token context window. A typical 10K-input / 2K-output call costs roughly $0.032.

What is Grok 4.5 best for?

Grok 4.5 by xAI is best for Opus-class reasoning and agentic coding with high token efficiency and real-time X and web data.

How does Grok 4.5 compare to Grok 4.3?

Grok 4.5 is the newer coding and agentic flagship on the 1.5T V9 foundation, more capable and far more token-efficient than Grok 4.3, though its 500K context is smaller than Grok 4.3's 1M.

Is Grok 4.5 multimodal?

Yes. Grok 4.5 supports text and image input.

Tools that use Grok 4.5