Major Release xAI · Released
Grok 4.20 0309
What is Grok 4.20 0309?
Grok 4.20 0309 is a Major Release AI model from xAI, released on March 10, 2026. It has a 2M tokens context window, costs $2.00 per million input tokens, and scores 96.5% on TAU2-bench. It is available via the company's API.
xAI Grok 4.20 0309 — AA Intelligence Index 48.5, 2M tokens context, reasoning model.
How much does Grok 4.20 0309 cost?
| Metric | Price |
|---|---|
| input per mtok | $2.00 |
| output per mtok | $6.00 |
| cache read per mtok | $0.20 |
Pricing data verified .
What context window does Grok 4.20 0309 have?
- Context window
- 2M tokens
- Max output
- 131K
- Input modalities
- text, image
- Output modalities
- text
How does Grok 4.20 0309 score on benchmarks?
| Benchmark | Score |
|---|---|
| GPQA Diamond | 88.5% |
| HLE | 30.0% |
| SciCode | 44.7% |
| TAU2-bench | 96.5% |
| TerminalBench-Hard | 40.9% |
| IF-Bench | 82.9% |
| LiveCodeBench Reasoning | 59.0% |
| AA Intelligence Index | 48.5 |
Benchmark scores verified .