Grok 4.5

Grok 4.5 is xAI's first model built specifically for coding and agentic work, released July 8, 2026 on the 1.5 trillion parameter V9 foundation (up from Grok 4.3's V8) and trained on real coding-agent data. It lands fourth on the Artificial Analysis Intelligence Index, above every open-weight model and every Gemini model, at a price more than 60% below Claude Opus 4.8 or GPT-5.5. It leads Opus 4.8 on the provider-harness DeepSWE 1.0 score and on Terminal-Bench 2.1 (83.3), but trails Opus 4.8 on the neutral DeepSWE 1.1 run and on SWE-Bench Pro (64.7). API pricing is $2 per million input tokens and $6 per million output, with cached input at $0.50 (a 75% discount) and a higher-context surcharge above 200K tokens. xAI narrowed the context window to 500K tokens (down from 1M on Grok 4.3) to point the model squarely at coding and agentic use. Reasoning effort is configurable (low, medium, high; default high). Built-in tools bill separately: Web Search, X Search, and Code Execution at $5 per 1,000 calls, File Attachments at $10 per 1,000, and Collections Search at $2.50 per 1,000.