Specifications
Context Window
—
Input Price/1M
$1.25
#555 of 744
Output Price/1M
$2.50
Parameters
—
Speed
120 tok/s
#117 of 602
Latency (TTFT)
12.2s
Cost per Task
15.9
AA Score / US$ · higher = better
Benchmarks
Grok 4.3 (medium) results on the main AI model evaluation benchmarks. Higher scores indicate better performance.
overall
| Benchmark | Score | Maximum | Methodology |
|---|---|---|---|
| AA Intelligence Index | 24.8 | 100.0 | Artificial Analysis official API |
Information
- Release date
- April 30, 2026
- Tool Calling
- ❌ Not supported
- Vision
- ❌ Not supported
- Audio
- ❌ Not supported
Full Analysis: Grok 4.3 (medium)
What is Grok 4.3 (medium)?
Grok 4.3 (medium) is an AI model developed by SpaceXAI, classified as a text model. It focuses on text processing and natural language generation. As a proprietary model, it is available via SpaceXAI's cloud API.
Pricing & Costs in 2026
Grok 4.3 (medium) is usage-based, priced at $1.25/1M input tokens and $2.5/1M output tokens. For context: 1 million tokens is approximately 750,000 words, or about 10 average-length books. The mid-range pricing balances quality and cost for most professional applications.
Benchmarks & Performance
Grok 4.3 (medium) was evaluated on 1 different benchmarks, covering categories like overall. Results show moderate performance across available evaluations.
It's important to note that benchmarks measure specific aspects and don't capture the full user experience. Factors like instruction adherence, behavior in long conversations, and real-world task quality vary significantly between models and aren't always reflected in standard scores.
Recommended Use Cases
Grok 4.3 (medium) specializes in text, offering advanced capabilities for creating and processing text content.
Comparison with Alternatives
In the 2026 AI model ecosystem, Grok 4.3 (medium) competes directly with similarly capable models. SpaceXAI competes in this segment against OpenAI, Anthropic, Google, and Meta. The choice between models depends on the specific use case, budget, latency requirements, and need for features like multimodality and tool calling.
For a detailed side-by-side comparison, use our comparison tool or check the overall model ranking.
Frequently Asked Questions
What is Grok 4.3 (medium)?
Grok 4.3 (medium) is an AI model developed by SpaceXAI. It is a text model.
How much does Grok 4.3 (medium) cost?
Grok 4.3 (medium) costs $1.25/1M input tokens and $2.5/1M output tokens. For heavy usage (e.g., a chatbot handling 100k messages/month), costs can range from $10 to $1,000 depending on volume.
How does Grok 4.3 (medium) compare with other models?
In available benchmarks, Grok 4.3 (medium) scored: AA Intelligence Index: 24.8/100. See the full table above for a detailed comparison.
Is Grok 4.3 (medium) open source?
No, Grok 4.3 (medium) is a proprietary model from SpaceXAI. It is available via cloud API. For open source alternatives, check our open source model ranking.
What is Grok 4.3 (medium) best for?
Grok 4.3 (medium) excels at general-purpose language tasks.
Last updated: September 12, 2026 • View methodology →