Claude 2.1 vs Grok 4.20 0309 v2
Anthropic vs xAI — benchmarks, pricing, and capabilities side by side.
- •Grok 4.20 0309 v2 has the higher intelligence index (91.1 vs 34.6)
- •Claude 2.1 is cheaper ($0.00 vs $2.00 per 1M input)
| Claude 2.1 | Grok 4.20 0309 v2 | |
|---|---|---|
| Intelligence index | 34.6 | 91.1 |
| Developer | Anthropic | xAI |
| Type | LLM | LLM |
| Access | — | — |
| Context window | — | — |
| Input price | $0.00 / 1M | $2.00 / 1M |
| Output price | $0.00 / 1M | $6.00 / 1M |
| Speed | — | 105 tok/s |
| Released | November 21, 2023 | April 7, 2026 |
| Parameters | — | — |
| Input modalities | — | — |
| Output modalities | — | — |
Shared benchmarks
Claude 2.1
Grok 4.20 0309 v2
GPQA Diamond
31.9
91.1
Humanity’s Last Exam
4.2
32.2