SpaceXAI released Grok 4.5 on July 8, 2026, its flagship model built specifically for coding, agentic workflows, and knowledge work. The model was trained on real developer session data from Cursor. It generates production-ready code from simple prompts, handling everything from low-level Rust and C++ to full application builds.

Grok 4.5 runs 4.2 times more efficiently than Anthropic’s Opus 4.8. On SWE Bench Pro, Grok averages 15,954 output tokens. Opus maxes at 67,020 tokens for the same task. This matters for developers: less token consumption means faster iteration and lower API costs.

Performance on Real Code

The model was benchmarked on real codebase sessions, not artificial tests. Developers load a repository. Grok navigates the structure, understands dependencies, and edits code with minimal instruction. The test measured what actually matters: solving problems in existing projects.

Token efficiency is the hidden metric. Faster APIs enable more requests. Lower costs justify enterprise adoption. Grok’s 4.2x advantage over Opus compounds across thousands of developer sessions.

Speed and Availability

Grok 4.5 runs at 80 tokens per second inference speed. This matters for real-time use. A developer types a prompt. They get code suggestions quickly. Lag kills productivity. Grok prioritizes speed.

The model is available today in Grok Build, inside Cursor on all plans, and from the SpaceXAI console. EU availability is coming mid-July. Pricing: $2 per million input tokens, $6 per million output. Cache hits get 75% discount.

Why This Matters

Grok enters a crowded market. Anthropic’s Claude dominates through integration. OpenAI controls through market position. Grok wins through efficiency and speed. Developers notice when code generation saves 30 minutes per day.

Grok 4.5 is available now. EU users wait two weeks for regional access.