xAI Grok-3.5 Review: Real-Time AI Gets Smarter
Grok-3.5 combines live internet access with improved reasoning. We test xAI's latest model across research, coding, and conversational tasks.
What's New in Grok-3.5
Grok-3.5 is xAI's iterative upgrade over Grok-3, focusing on reasoning depth and real-time data integration. Trained on data from X (formerly Twitter) and the broader web, Grok-3.5 offers uniquely current knowledge—often referencing events from hours ago.
The model now supports a 256K context window (up from 128K), structured JSON output, and improved function calling for agentic workflows.
Real-Time Research Capabilities
Grok-3.5's killer feature is live internet access with source citations. Unlike ChatGPT's browsing mode (which can feel sluggish), Grok's integration is native and fast. Ask about a breaking news story, and it returns detailed analysis with links within seconds.
In our research tests, Grok-3.5 provided more current information than Perplexity in 7 out of 10 queries, though Perplexity's source diversity was broader. For trending topics and social media analysis, Grok is unmatched.
Reasoning and Coding
On standard benchmarks, Grok-3.5 scores competitively: 86.1% on MMLU-Pro, 85.2% on HumanEval. It won't dethrone GPT-5 or Claude 4.6 on pure reasoning, but it holds its own against Gemini 3 Pro.
Coding assistance is solid. Grok-3.5 handles Python, JavaScript, and TypeScript well, with good understanding of modern frameworks. Its ability to reference the latest documentation (via live access) gives it an edge for newer libraries.
Personality and Tone
Grok maintains its signature irreverent tone—it's more willing to engage with edgy topics and humor than competitors. This makes it popular for casual use but potentially problematic for enterprise deployments where tone control matters.
The 'professional mode' introduced in 3.5 significantly tones down the personality, making it viable for business applications. However, Claude and GPT still offer more granular tone control.
Verdict
Grok-3.5 is the best AI for real-time research and trend analysis. If you need current information with AI-powered synthesis, it's your top choice. For pure reasoning or enterprise deployment, GPT-5 and Claude 4.6 remain stronger options.
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