xAI completes Grok 4.3 API rollout with 1M context, native video, and ~40% price cut
xAI
xAI flipped the switch on Grok 4.3 as the flagship API model on April 30, 2026, completing the rollout that began with the April 17 beta. Pricing dropped roughly 40% on input tokens to $1.25 per million input and $2.50 per million output, with a 1M-token context window and native video input added for the first time. Existing API customers were prompted in-console to migrate from grok-4.20 to grok-4.3.
Why it matters
The combined price cut, 1M context, and video input materially reshape the cost-quality frontier for agentic and long-document workloads, putting fresh pressure on Anthropic and OpenAI pricing.
Importance: 4/5
Flagship API GA from a frontier lab with major pricing and capability changes (1M context + video input + ~40% price cut).
Sources
official
xAI Release Notes