xAI: Grok 4.3
xAI: Grok 4.3 is an advanced AI model capable of processing vast text contexts up to one million tokens, as well as handling images and file inputs. It supports tools and reasoning, though it does not generate structured output or provide open-source weights. This model stands out for its versatility in dealing with diverse input modalities but may be less suitable for applications requiring structured outputs due to the lack of support in this area. Given its price at $1.25 per million input tokens and $2.5 per million output tokens, it is more cost-effective for users primarily focused on text-based tasks or those looking to integrate multiple modalities without needing extensive structured data handling.
Benchmark results
Independent, published benchmarks. Blended score 58.0 across 3 benchmarks, last refreshed 2026-07-31. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 62.0 |
| AI Index Coding | software engineering tasks | 69.7 |
| AI Index Agentic | multi-step tool-using tasks | 39.8 |
- 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 |
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Quick answers
- How much does xAI: Grok 4.3 cost?
- $1.25 per million input tokens and $2.50 per million output tokens.
- What is xAI: Grok 4.3's context window?
- 1,000,000 tokens, roughly 1,500 pages of text in a single request.
- Does xAI: Grok 4.3 support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can xAI: Grok 4.3 process images?
- Yes, it accepts image input.