API · Models
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Grok 4.3
Grok 4.3 is a new model matching the scale of Grok 4.20 with an improved architecture and a December 2025 knowledge cutoff.
Context 1M·Max out 1M
Quickstart
import { streamText } from 'ai';
import { createOpenAICompatible } from '@ai-sdk/openai-compatible';
const blackbox = createOpenAICompatible({
name: 'blackbox',
apiKey: process.env.BLACKBOX_API_KEY!,
baseURL: 'https://api.blackbox.ai/v1',
});
const result = streamText({
model: blackbox('blackboxai/x-ai/grok-4.3'),
prompt: 'Why is the sky blue?',
});
for await (const chunk of result.textStream) {
process.stdout.write(chunk);
}Specs & pricing
- Input $/M
- $1.25
- Output $/M
- $2.50
- Context window
- 1M
- Max output
- 1M
- Supported parameters
- tool-usereasoningvisionstreamingweb-search
Related models
| Model | Type | Context | Input $/M |
|---|---|---|---|
| Grok 4.1 Fast | Text | 2M | $0.20 |
| Grok Build 0.1 | Text | 256K | $1 |
| Blackbox Pro | Text | 400K | $1.75 |
| Claude Opus 4.7 | Text | 1M | $5 |
| Claude Opus 4.6 | Text | 1M | $5 |