Grok 4.3 is a reasoning model from SpaceXAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...
Specifications
| Provider | xAI |
|---|---|
| Context window | 1,000,000 tokens (1M) |
| Input price | $1.25 / 1M tokens |
| Output price | $2.5 / 1M tokens |
| Input modalities | text, image, file |
| Output modalities | text |
| Model ID | x-ai/grok-4.3 |
Pricing is per 1M tokens, indicative pricing via OpenRouter (updated 2026-08-22); a provider's own list price may differ.
Frequently asked questions
How much does Grok 4.3 cost?
Indicative pricing (via OpenRouter, updated 2026-08-22) is $1.25 per 1M input tokens and $2.5 per 1M output tokens. A provider's own list price may differ. On Vincony, Grok 4.3 is available on credit-based pricing alongside 800+ other models.
What is Grok 4.3's context window?
Grok 4.3 supports a context window of up to 1,000,000 tokens (1M), which is how much text it can consider at once.
Who makes Grok 4.3?
Grok 4.3 is built by xAI. You can access it — and compare it against other providers' models — through Vincony's multi-model platform.
How do I use Grok 4.3?
You can use Grok 4.3 directly through xAI, or via Vincony, which aggregates 800+ models (including Grok 4.3) into one interface with side-by-side comparison and credit-based pricing.