Grok 4.3 is a unique model in our tests. It's one of the fastest models, and its responses are far smaller/token dense than other models with comparable performance.

However, its overall coding reasoning ability is not competitive with the big April releases, and neither Grok 4.20 nor Grok 4.3 have been able to significantly push the intelligence frontier since Grok 4. Grok 4.3 is better in agentic workloads, and a fair analogy would be that it's capabilities are approximately GPT 5.1 / Gemini 3 Pro Preview level, but much faster and cheaper. So definitely a solid release in its own ways. Many of the recent open weights releases are smarter, but slower.

Full benchmarks at https://gertlabs.com/rankings