xAI's Grok 4.5: benchmarks and pricing vs. GPT-5.5 and Claude Opus

Grok 4.5 arrived promising to dethrone Claude Opus and GPT-5.5 at a price 80% lower. Does it deliver? We analyze the real benchmarks and xAI’s strategy.

xAI trained this AI model for programming using real developer sessions in Cursor, giving it concrete advantages on agentic tasks. On SWE Bench Pro, it scores 64.7%, below Fable 5 (80.4%) but above GPT-5.5 (58.6%). Most striking is its price: $2/M input tokens and $6/M output tokens, compared with $25–50 from its direct competitors. It’s not number one in every ranking, but it may be enough to justify switching if you’re running thousands of API calls per day.

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🤖 AI-generated content: the script, voices, and images for this episode were produced using artificial intelligence tools.

📷 Images:

• “San Antonio data center” — Robert Scoble (CC BY 2.0) — https://www.flickr.com/photos/35034363287@N01/2340202215
• “Quantum Computing for Google Goggles” — jurvetson (CC BY 2.0) — https://www.flickr.com/photos/44124348109@N01/4171280876
• “Cyberdyne Systems” — jurvetson (CC BY 2.0) — https://www.flickr.com/photos/44124348109@N01/9848225175
• “SGI Indy :: Retrocomputing on the green” — br1dotcom (CC BY 2.0) — https://www.flickr.com/photos/21394564@N04/13506614143

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