SpaceXAI releases Grok 4.5, an Opus-class model built for coding
SpaceXAI has released Grok 4.5, a model developed in collaboration with Cursor. It is positioned as a rival to OpenAI and Anthropic: it runs at 80 TPS and costs $2 per million input tokens and $6 per million output tokens. The model ranks first on the Harvey Legal Agent Benchmark.
AI-processed from MarkTechPost; edited by Hamidun News
# SpaceXAI releases Grok 4.5: competition in coding
On July 14, 2026, SpaceXAI released Grok 4.5, its first release since the company went public and acquired Cursor, a startup specializing in AI coding.
Grok 4.5 specifications
- Opus class — comparable to the best models from competitors
- Trained jointly with Cursor
- Performance: 80 TPS (transactions per second)
- First release of the combined Cursor + SpaceXAI product
Pricing
- $2 per million input tokens
- $6 per million output tokens
- Competitive prices compared with OpenAI and Anthropic
Focus areas
Grok 4.5 is positioned specifically for:
- Coding and code analysis
- Agentic tasks (autonomous systems)
- Knowledge work
- NOT for casual chat
Achievements
The model took first place on the Harvey Legal Agent Benchmark, which points to its ability to work with agentic systems on complex legal tasks.
What this means
The release shows that SpaceXAI, backed by Elon Musk, is making a serious bid to compete in the market for advanced AI models. The focus on coding and agentic systems points to its target audience: developers and companies integrating AI into their workflows.
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Key Questions Answered
What are the key details on Grok 4.5 specifications?
Opus class — comparable to the best models from competitors Trained jointly with Cursor Performance: 80 TPS (transactions per second) First release of the combined Cursor + SpaceXAI product
What are the key details on Pricing?
$2 per million input tokens $6 per million output tokens Competitive prices compared with OpenAI and Anthropic
What are the key details on Focus areas?
Grok 4.5 is positioned specifically for: Coding and code analysis Agentic tasks (autonomous systems) Knowledge work NOT for casual chat
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