Gemini 4 Argon vs. Claude Opus 5.5: Half the price and about half as accurate

When Google announced Gemini 4 Argon to a small group of testers on September 30, it came with a benchmark table that put Argon ahead of Claude Opus 5.5 on 14 of 18 tests. Those include DeepSWE (77.9% vs. 74.2%) and GraphWalks at 256K to 1 million tokens (84.2% vs. 66.8%). Two weeks later, on October 13, Google opened Argon to paid Gemini API developers. To its credit, Google also showed where Opus 5.5 wins. Opus leads on the other four benchmarks, including Terminal-bench 4.0 (66.4% vs. 57.4%), which tests agentic work in a command line. Google is also undercutting Anthropic on price, at least for now. Through November 30, Argon costs $2 per million input tokens and $10 per million output tokens, half the price of Opus 5.5.

First reported by The New Stack. This page is a short excerpt; the full text is theirs.