WorldofAI

Grok 4.5 IS REALLY GOOD! Opus & GPT Level BUT Faster, Cheaper, & Smarter! (Fully Tested)

⏱ 14 min video · 3 min read9 Jul 2026

TL;DR

xAI has released Grok 4.5, a coding-focused model trained alongside Cursor that rivals Claude Opus 4 and GPT-5.5 on key benchmarks while being significantly faster and cheaper. The creator runs it through a vibe-coding benchmark suite covering frontends, 3D scenes, SVGs, and games, concluding it is an excellent daily-driver workhorse for coding agents and everyday development tasks.

Key points

Grok 4.5 scores 83.3% on TerminalBench (tied with GPT-5.5) and 64.7% on SWE-Bench Pro (beating GPT-5.5, behind Claude Opus 4 at 80.4%), ranking #4 on the creator's World of AI leaderboard and #4 on Artificial Analysis.

It generates 4.2x fewer output tokens than Claude Opus 4 on SWE-Bench Pro, runs at 80 tokens per second, and costs just $2 per million input tokens and $6 per million output tokens.

Grok 4.5 was trained alongside Cursor and is positioned as a high-efficiency coding agent workhorse, not a replacement for top frontier models like Claude Opus 4 or GPT-5.5 for the hardest problems.

Context window is currently 500k tokens but is expected to expand to 1 million tokens around mid-July 2025, according to Elon Musk.

Strong performance in frontend generation and SVG; weaker in 3D (Three.js) scenes, where textures and environmental detail lagged behind competing models.

Actionable insights

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Replace Claude Sonnet in multi-model agent orchestration pipelines with Grok 4.5 to cut token costs dramatically while maintaining strong coding output quality.

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Use Grok 4.5 as a daily driver for everyday coding, debugging, and agent workflows, then switch to Claude Opus 4 only for the hardest engineering problems to optimise cost vs. capability.

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Avoid Grok 4.5 for Three.js or complex 3D scene generation for now, as it produces bland textures and lacks the environmental detail seen in competing frontier models.

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Access Grok 4.5 via xAI Grok Build, the API, or Cursor plans; EU availability is expected in mid-July 2025.

Notable quotes

“Grok 4.5 is served at fast model speeds at 80 TPS tokens per second, which is just remarkable — combined with twice greater token efficiency than the latest leading models at the same task.”

“I personally believe that Fable 5 is something that I would still use on a day-to-day basis, but I would plug in the Grok 4.5 whenever I need to use something as my daily driver — meaning something that I can use for everyday coding tasks, debugging, or agent workflows.”

“Space X AI is definitely back and they just dropped one of the best models I have ever seen in a long time.”

Worth watching?

⏭️

Worth watching the full video?

The key benchmarks, pricing, and practical use-case guidance are all captured here — skip the video unless you want to see the actual visual outputs from the coding and design tests, which are genuinely impressive and hard to appreciate from text alone.

Topics

AI & Tech Grok

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