Grok 4.3
Grok 4.3 is xAI's flagship multimodal model with a 1M-token context window, strong agentic tool use, vision support, structured outputs, and industry-leading factual reliability.
Model Overview
Capabilities, design details, and architectural traits
Grok 4.3 – Frontier Multimodal Model for Long-Context
Grok 4.3 (grok-4.3) is xAI's flagship multimodal language model designed for long-context reasoning, enterprise AI agents, and production-scale applications. It combines a 1-million-token context window with native tool use, structured outputs, image understanding, and function calling, making it suitable for retrieval-augmented generation, software development, and complex analytical workloads.
Documented Characteristics
- 1M-token context window for long documents and extended conversations.
- Native support for text and image inputs with text generation.
- Built-in function calling, structured JSON outputs, and agentic tool use.
- Designed for complex reasoning, coding, planning, and enterprise AI workflows.
- Supports web search and external tool integration through compatible platforms.
- Proprietary commercial model available through the xAI API and partner platforms.
Benchmark Performance
Independent evaluations · Artificial Analysis
Accuracy & Capability Details
Independent evaluation data provided by Artificial Analysis. To view the latest benchmarks and full details, visit their official site.
Compare Models Side-by-Side
Evaluate specifications, pricing, and independent benchmark indices
| Model Details | xAIHost Grok 4.3 | ||
|---|---|---|---|
| General Info | |||
| Provider | xAI | Anthropic | Anthropic |
| Release Date | April 30, 2026 | June 9, 2026 | May 28, 2026 |
| Knowledge Cutoff | — | — | — |
| Context & Limits | |||
| Context Window | 1M | 1M | 1M |
| Pricing (per 1M tokens) | |||
| Input Pricing | $1.25 Best Input Pricing | $10 | $5 |
| Output Pricing | $2.50 Best Output Pricing | $50 | $25 |
| Modalities | |||
| Inputs | textimage | textimagefile | textimagefile |
| Outputs | text | text | text |
| Benchmarks (0-100) | |||
| Intelligence Index | 37.6 | 59.9 Best Intelligence Index | 55.7 |
| Coding Index | 42.2 | 76.5 Best Coding Index | 74.3 |
| Agentic Index | 24.1 | 52.8 Best Agentic Index | 47.2 |
GPQA Benchmark
Graduate-level reasoning and expert Q&A evaluation.
Humanity's Last Exam
Extremely difficult logical reasoning and knowledge.
IFBench Instruction
Evaluation of strict instruction following.
Benchmark scores are independent evaluations sourced from Artificial Analysis. Intelligence, Coding, and Agentic indices reflect composite performance ratings (0–100).