Key facts
- SpaceXAI launched Grok 4.5 on July 8.
- Grok 4.5 is priced at $2 per million input tokens and $6 per million output tokens.
- Elon Musk stated Grok 4.5 is comparable to Anthropic's Opus 4.7 but faster.
- Grok 4.5 achieved 53% on DeepSWE 1.1 and 64.7% on SWE Bench Pro.
- Grok 4.5 demonstrated efficiency, using fewer output tokens than Anthropic's Opus 4.8.
- Anthropic has a $40 billion compute deal with SpaceX's xAI unit.
SpaceXAI has launched its latest AI model, Grok 4.5, on July 8, positioning it as a cost-effective alternative to leading models from Anthropic and OpenAI. The model is priced at $2 per million input tokens and $6 per million output tokens, significantly less than comparable offerings.
Elon Musk announced the release on X, stating that Grok 4.5 is roughly comparable to Anthropic's previous flagship, Opus 4.7, but offers much greater speed. Benchmarks show Grok 4.5 scoring 53% on DeepSWE 1.1 and 64.7% on SWE Bench Pro, with the company highlighting its efficiency. Grok 4.5 used an average of 15,954 output tokens to complete tasks on SWE Bench Pro, compared to 67,020 tokens for Anthropic's Opus 4.8.
The model was trained using tens of thousands of Nvidia GB300 GPUs on SpaceXAI's Colossus supercomputer and is available via API and on Hermes and Grok build, offering half a million tokens of context. European users are expected to gain access in mid-July.
In parallel, Musk praised Anthropic's AI models, Mythos/Fable, calling them the current leader in AI and promising not to "cut them off" despite their competitive relationship. Anthropic is a major customer of SpaceX's xAI unit, having signed a deal to buy 300 megawatts of compute from the Colossus 1 data center for approximately $40 billion through May 2029. Google also has a significant infrastructure rental agreement with SpaceX.
Musk cited Tesla's patent pledge and the opening of its Supercharger network, as well as SpaceX's launch of competing satellite systems without unfair terms, as evidence of his non-adversarial business style towards competitors.