xAI: Grok 4.20
Grok 4.20 is a reasoning model from xAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...
Everything else
| Max output | — |
|---|---|
| Input / 1M | $1.25 |
| Output / 1M | $2.50 |
| Cache read / 1M | $0.2 |
| Cache write / 1M | — |
| 1M in + 1M out | $3.75 |
| Takes | text, image, file |
| Returns | text |
| Tools | yes |
| Reasoning | optional |
| Open weights | no |
| Released | 2026-03-31 |
| Knowledge cutoff | 2025-09-01 |
| Retires | — |
| Catalog id | x-ai/grok-4.20 |
Benchmarks
| source | epoch |
|---|---|
| eci | 152.59 |
| confidence | Likely |
| accessibility | API access |
Benchmark scores by Epoch AI, CC BY 4.0.
Using it
In 00, this model is picked per agent — and per tier, so the model that answers your customers need not be the one that writes your code. Get 00.