SpaceXAI: Grok 4.3
SpaceXAI: Grok 4.3 is equipped to handle text, images, and files, making it versatile for various input types. With a context length of 1 million tokens and support for reasoning tools, the model excels in complex tasks that require deep understanding and interaction. While its blended benchmark score of 57.5 across three independent benchmarks places it within competitive territory, the pricing at $1.25 per M input token and $2.5 per M output token might be a factor for those prioritizing cost-effectiveness. This model is particularly suitable for users requiring a mix of text and image processing capabilities, though its benchmark coverage may not fully reflect all aspects of its performance.
Benchmark results
Independent, published benchmarks. Blended score 57.5 across 3 benchmarks, last refreshed 2026-08-13. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 62.6 |
| AI Index Coding | software engineering tasks | 69.7 |
| AI Index Agentic | multi-step tool-using tasks | 39.9 |
- Model ID
- x-ai/grok-4.3
- Vendor
- x-ai
- Released
- April 2026
- Tokenizer
- Grok
- Input Modalities
- text, image, file
- Output Modalities
- text
- Max Output
- default
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- no
What it costs in practice
Computed from the current $1.25/M input and $2.50/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.04 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.75 |
| A month of a busy support chatbot | 5M in / 2M out | $11.25 |
Similar models
SpaceXAI: Grok 4.6
SpaceXAI: Grok 4.5
SpaceXAI: Grok Build 0.1
SpaceXAI: Grok 4.20
SpaceXAI: Grok 4.20 Multi-Agent
Quick answers
- How much does SpaceXAI: Grok 4.3 cost?
- $1.25 per million input tokens and $2.50 per million output tokens.
- What is SpaceXAI: Grok 4.3's context window?
- 1,000,000 tokens, roughly 1,500 pages of text in a single request.
- Does SpaceXAI: Grok 4.3 support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can SpaceXAI: Grok 4.3 process images?
- Yes, it accepts image input.