Anthropic: Claude Sonnet 5 vs SpaceXAI: Grok 4.5
anthropic vs x-ai
On price, SpaceXAI: Grok 4.5 is cheaper (blended cost is about 0.75× that of Anthropic: Claude Sonnet 5).
On capability, SpaceXAI: Grok 4.5 has the higher intelligence index (39) — better for complex reasoning.
Verdict: pick SpaceXAI: Grok 4.5 on a budget, or SpaceXAI: Grok 4.5 for output quality. Full details below.
Side-by-Side Specs
| Metric | Anthropic: Claude Sonnet 5 | SpaceXAI: Grok 4.5 |
|---|---|---|
| Input /1M | $2.00 | $2.00 |
| Output /1M | $10.00 | $6.00 |
| Blended (3:1) | $4.00 | $3.00 |
| Context | 1.0M | 500K |
| Intelligence | 38 | 39 |
| Coding | 72 | 72 |
| Math | — | — |
| Speed | 74 tok/s | 61 tok/s |
| CPS Grade | A | A |
FAQ
Which is cheaper, Anthropic: Claude Sonnet 5 or SpaceXAI: Grok 4.5?
On price, SpaceXAI: Grok 4.5 is cheaper (blended cost is about 0.75× that of Anthropic: Claude Sonnet 5). Anthropic: Claude Sonnet 5: $2 in / $10 out; SpaceXAI: Grok 4.5: $2 in / $6 out (per 1M tokens).
Which is smarter, Anthropic: Claude Sonnet 5 or SpaceXAI: Grok 4.5?
On capability, SpaceXAI: Grok 4.5 has the higher intelligence index (39) — better for complex reasoning. Coding index: Anthropic: Claude Sonnet 5 72 vs SpaceXAI: Grok 4.5 72.
Which one should I choose?
Verdict: pick SpaceXAI: Grok 4.5 on a budget, or SpaceXAI: Grok 4.5 for output quality. Full details below.