xAI has released the specifications for Grok 4.3, a fast and reliable model. The model supports connections to external tools and systems.
Model ReleasesPricing & LimitsxAIGrok 4.3
xAI Launches Grok 4.3 with Enhanced Tool Use and Step-by-Step Reasoning via API
This article is a translation. Read the Japanese original
It also supports generating responses in specific, structured formats. Users can select from four levels of reasoning depth: none, low, medium, and high.
The pricing structure is based on the number of tokens used during API calls. xAI stated that costs can be significantly reduced by utilizing cached input tokens.
Furthermore, different rates apply to requests exceeding a 200K context window. The model is available across multiple clusters, with detailed pricing provided by region.
Sources: Grok 4.3 (HN 405pt, 529 comments) (HN Search (backfill), 2026-05-01)