Grok 4.3
xAI's latest flagship model featuring a massive 1M token context window. Strong reasoning capabilities with multimodal input support at competitive pricing for the flagship tier.
Specifications
| Lab | xAI |
|---|---|
| Context window | 1M tokens |
| Input price | $1.25/1M |
| Output price | $2.50/1M |
| Release | Apr 2026 |
Strengths
- Massive 1M token context window
- Strong reasoning capabilities
- Competitive pricing for flagship tier
- Multimodal input (text and images)
- Fast inference with high throughput
Weaknesses
- Below absolute top-tier flagships in general intelligence
- Limited third-party ecosystem and integrations
- Alignment can produce inconsistent refusals
Best for
- Long-document analysis and summarization
- Research requiring large context windows
- Cost-effective general-purpose tasks
- Multimodal reasoning workflows
In Depth: Grok 4.3
Summary
Grok 4.3 is an AI model from xAI.
Released in Apr 2026. It currently appears in the Overall category on LMRank and 1 other category. It takes text input and produces text output, with a context window of 1M tokens. Input pricing is $1.25 per 1M tokens and output is $2.50 per 1M tokens on OpenRouter.