Grok 4.3
Alias grok-4.3-latest. Cheaper long-context option still offered alongside Grok 4.7. Release month inferred from OpenRouter listing date (2026-04-30); exact date not verified.
- Context window
- 1,000,000 tokens
- Input
- text, image
- Output
- text
- License
- proprietary
- Pricing
- input: $1.25 · cached input: $0.2 · output: $2.5 · input over 200k: $2.5 · output over 200k: $5 (per 1M tokens (USD); Batch API 20% off) source
- Verified
- 2026-09-29
How to call it
| Provider | Model id | Endpoint / URL | Docs |
|---|---|---|---|
| xAI API | grok-4.3 | https://api.x.ai/v1/chat/completions | docs |
| AWS Bedrock | xai.grok-4.3 | — | docs |
| OpenRouter | x-ai/grok-4.3 | openrouter.ai/x-ai/grok-4.3 | — |
| Web app | — | grok.com | — |
Notable capabilities (2)
- 1M context at budget price: 1M-token context window at $1.25/$2.50, cheaper than the 500K-context Grok 4.5-4.7 line. source
- Reasoning effort incl. none: Reasoning effort none / low / medium / high / xhigh, default low - usable as a fast non-reasoning model. source
Cost-efficient 1M-context Grok for long documents and high-volume agents.
curl https://api.x.ai/v1/chat/completions -H "Authorization: Bearer $XAI_API_KEY" -H "Content-Type: application/json" \
-d '{"model":"grok-4.3","messages":[{"role":"user","content":"Hello"}]}'
Sources: https://docs.x.ai/docs/models , https://docs.x.ai/docs/models/grok-4.3
Other xAI models
Grok 4.7 · Grok Voice Transcribe 2.0 · Grok Imagine Image 2.0 · Grok Voice Think Fast 2.0 · Grok Imagine Video 1.5 · Grok Build 0.1 · Grok Text to Speech (Grok TTS API) · Grok 4.20 (Reasoning / Non-reasoning / Multi-Agent)