Grok 4.5 Just Landed — Frontier Coding at a Fraction of the Price
xAI's Grok 4.5 ranks #4 globally on the Intelligence Index, matches GPT-5.5 on coding agent benchmarks, and costs less than half. It's live on Multos now.
xAI shipped Grok 4.5 on July 8th and the numbers are hard to ignore: #4 on Artificial Analysis's Intelligence Index, the single best agentic tool-use score of any model tested, a 500K-token context window, and pricing at $2/$6 per million tokens — less than half what comparable frontier models charge. It's been live on Multos since the hour it dropped.
The Numbers That Matter
SWE-Bench Pro: 64.7% (ahead of GPT-5.5's 58.6%). Terminal-Bench 2.1: 83.3% (neck-and-neck with GPT-5.5). Coding Agent Index: 76 points running in Grok Build — matching GPT-5.5 in Codex, trailing Fable 5 by just one point. On Artificial Analysis's composite Intelligence Index it scores 54, ranking 4th out of 168 models. And it does all this at roughly one-fifth the cost of Claude Fable 5.
Why I Added It Immediately
Grok 4.5 hits a sweet spot we didn't have covered: near-frontier intelligence at budget-tier pricing. With a 500K context window, it handles large codebases comfortably. Its agentic tool-use performance is genuinely best-in-class — which means when Multos routes tasks to Grok 4.5 via Auto mode, complex multi-step builds succeed on fewer retries. Your token pool stretches dramatically without sacrificing output quality.
How It Pairs with Our Stack
Our design system enforces premium UX from the first generation — warm palettes, proper typography, restrained layouts. Grok 4.5 follows these constraints well because its instruction-following is strong. Combined with Batch Mode (all files in a single batch_execute call), you get full-stack apps built efficiently with code that actually looks intentionally designed. I've been using it personally for rapid prototyping all week — the results are indistinguishable from Sol on most frontend tasks, at a fraction of the token cost.
The Multi-Model Advantage
This is exactly why we built Multos around model choice. GPT-5.6 Sol for complex architecture. Grok 4.5 for efficient full-stack implementation. GLM-5.2 for repo-scale refactoring with its 1M context window. DeepSeek Flash for quick file operations. Auto mode routes between all of them — or you pick manually with transparent multipliers. No single model is best at everything. Having 31 across 11 providers means you always have the right tool at the right price.
Available Now, All Plans
Grok 4.5 is live in the model dropdown for all paid plans. Free users get access via Auto mode. The multiplier is low — your pool stretches significantly when routed here. If you've been watching your token usage carefully, this is the model that changes the economics.
Ready to Get Started?
Frontier coding at budget pricing. Try Grok 4.5 on Multos — start free.
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