xAI: Grok 4.3
Grok 4.3 is a reasoning model from xAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...
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 · high, medium, low, none |
| Open weights | no |
| Released | 2026-04-30 |
| Knowledge cutoff | — |
| Retires | — |
| Catalog id | x-ai/grok-4.3 |
Benchmarks
| source | epoch |
|---|---|
| gpqa | 0.888 |
| gpqaStderr | 0.0196 |
| aime | 0.933 |
| aimeStderr | 0.0304 |
| simpleQA | 0.38 |
| simpleQAStderr | 0.0154 |
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.