Grok 4.3 Model Specs, Costs & Benchmarks (July 2026)
Grok 4.3, developed by XAI, features a context window of 1M tokens. The model costs $1.25 per million tokens for input and $2.50 per million tokens for output. It was released on April 30, 2026, and has achieved impressive scores in various benchmarks.
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Overview
 Grok 4.3 | |
|---|---|
Model Provider The organization behind this AI's development | XAI |
Input Context Window Maximum input tokens this model can process at once | 1M tokens |
Output Token Limit Maximum output tokens this model can generate at once | Not specified tokens |
Release Date When this model first became publicly available | April 30, 2026 2 months ago April 30th, 2026 |
Pricing
| Grok 4.3 | |
|---|---|
Short Context Pricing Base rates before a long-context threshold applies | |
Input Token Cost Cost per million input tokens | $1.25 per million tokens |
Output Token Cost Cost per million output tokens | $2.50 per million tokens |
Web Search Cost Additional cost for each web search operation | $0.005 per search |
Cache Read Cost Cost to reuse cached input tokens | $0.20 per million tokens |
Long Context Pricing Rates for prompts with 200,000 or more tokens | |
Input Token Cost Long-context input cost per million tokens | $2.50 per million tokens |
Output Token Cost Long-context output cost per million tokens | $5.00 per million tokens |
Cache Read Cost Long-context cache read cost per million tokens | $0.40 per million tokens |
Capabilities & Features
| Grok 4.3 | |
|---|---|
Input Types Supported input formats | textimagefile |
Output Types Supported output formats | text |
Tokenizer Text encoding system | Grok |
Key Features Advanced capabilities | ✓ Function Calling✓ Structured Output✓ Reasoning Mode |
Reasoning Controls Defaults and configurable reasoning effort | Enabled by defaultEffort: High, Medium, Low, NoneDefault: Low |
Benchmarks
| Grok 4.3 | |
|---|---|
Intelligence Index Overall model quality across independent evaluations | 37.6 (Artificial Analysis index; higher is better) |
Coding Index Programming performance across independent evaluations | 42.2 (Artificial Analysis index; higher is better) |
Agentic Index Ability to complete multi-step agentic tasks | 24.1 (Artificial Analysis index; higher is better) |
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,235 Elo (#38 in Game Dev (49.5% win rate)) |
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