Grok 4.3
General-purpose work where speed and a huge context window both matter.
What are Grok 4.3's specs and price?
Grok 4.3, built by xAI, ships a 1M-token context window and a 64K-token max output, released 2026-06. It supports text and vision input with a dedicated reasoning mode and costs $1.56 per million blended tokens, the 17th-cheapest of 32 models we track.
Specs
| Context window | 1M tokens |
| Max output | 64K tokens |
| Modalities | text, vision |
| Extended thinking | Yes |
| Released | 2026-06 |
| Knowledge cutoff | 2026-04 |
| Provider | xAI |
Verified 2026-08-08 — source.
Where it ranks
Strengths
- xAI’s general-purpose flagship
- Extremely fast for its size
- 1M-token context
More about Grok 4.3
FAQ
What is Grok 4.3's context window?
Grok 4.3 has a 1M-token context window and a 64K-token max output — the 5th-largest context of the 32 current models we track. Source: https://docs.x.ai/docs/models, verified 2026-08-08.
Does Grok 4.3 support vision or audio input?
Yes — Grok 4.3 accepts vision input in addition to text.
Does Grok 4.3 have a reasoning or extended-thinking mode?
Yes — Grok 4.3 exposes a dedicated reasoning mode for multi-step problems.
When was Grok 4.3 released, and what is its knowledge cutoff?
Grok 4.3 was released 2026-06 with a knowledge cutoff of 2026-04.
How much does Grok 4.3 cost, and who provides it?
Grok 4.3 is served by xAI at $1.56/M blended tokens (3:1 input:output) — the 17th-cheapest of 32 current models. Full pricing breakdown: /llm-api-pricing/grok-4-3.