Grok 4.20
x-ai/grok-4.20-20260309
xAI: Grok 4.20, provided by x‑ai, accepts text, image, and file inputs and produces text output. It supports tools and reasoning, offers a context length of 2 000 000 tokens, and is priced at $1.25 per million input tokens and $2.5 per million output tokens. The model was released on 2026‑03‑31 and its weights are not open.
- tool use
- structured outputs
- reasoning
At a glance
Specifications
What the API gives you
- Context window
- 2M tokens
- Max output
- —
- Input price
- $1.25 / 1M tokens
- Output price
- $2.50 / 1M tokens
- Cache read
- $0.20 / 1M tokens
- Modalities
- text, image, file → text
- Knowledge cutoff
- Sep 1, 2025
- Released
- Mar 31, 2026
Recommendation coverage
Where this model appears
Not currently included in a published recommendation. This means the available task-specific evidence did not support a ranking yet—not that the model was reviewed and rejected.
Benchmarks
No independent benchmark results are linked to this model yet. We keep it visible while withholding quality claims until usable results arrive.
Catalog data via OpenRouter and models.dev. Last checked within the past 6 hours.