GPT-5.1 (high) vs Grok 4.20 0309 (Reasoning)
For product management work, compared on the PM Index.
- Grok 4.20 0309 (Reasoning) leads on the PM Index (48.4 vs 48.1).
- Grok 4.20 0309 (Reasoning) is cheaper ($3.00 vs $3.44 per 1M tokens).
- Grok 4.20 0309 (Reasoning) is faster (197 vs 139 tok/s).
| Metric | GPT-5.1 (high) | Grok 4.20 0309 (Reasoning) |
|---|---|---|
| PM Index | 48.1 | 48.4 |
| AA Intelligence | 47.7 | 48.5 |
| AA Coding | 44.7 | 42.2 |
| AA Agentic | 51.3 | 50.9 |
| Blended $/1M | $3.44 | $3.00 |
| Output tok/s | 139 | 197 |