Overview
Grok 4.3 is xAI's spring 2026 release, rolling out as a beta across grok.com, the X platform and third-party clouds including Amazon Bedrock. It extends the 4.x line with a 1-million-token context window and notably stronger document generation — long-form writing, reports and structured outputs that hold together better than earlier Groks.
Grok's signature edge remains live access to X and the wider web for current information, plus the less-filtered personality some users prefer for brainstorming. Grok 5 is still in training, so 4.3 is the current flagship and the one to benchmark for teams evaluating xAI for agentic and long-context work.
Key capabilities
- 1-million-token context window
- Markedly better document generation
- Available on Amazon Bedrock and grok.com
- Live X and web access retained
At a glance
Context
1M tokens
Document gen
Big step over Grok 4.1
Availability
Bedrock · grok.com · X
Pricing: Competitive frontier-tier pricing; beta access tiered on X.
Pros & cons
What we like
- Huge 1M context at competitive price
- Strong long-form document output
- Real-time information access
- Broad cloud availability including Bedrock
Trade-offs
- Still a beta — rough edges expected
- Reasoning trails the very top frontier models
- Less-filtered style isn't ideal for every use case
The verdict
Grok 4.3 is xAI's most capable Grok yet — long-context, better at structured documents, and easy to reach across grok.com, X and Bedrock. If you want a frontier model with live web access and a less censored voice, it's a serious option while Grok 5 trains.
Best for: Long-context work, current events and document generation.
Frequently asked questions
What's new in Grok 4.3?
It's a spring 2026 beta with a 1M-token context window, markedly better document generation, and broad availability including Amazon Bedrock. Grok 5 is still in training, so 4.3 is the current xAI flagship.
Where can I use Grok 4.3?
It's available as a beta on grok.com, the X platform and third-party clouds such as Amazon Bedrock — with live access to X and the web for current information.
