Grok 4.3
x-ai/grok-4.3-20260430
xAI: Grok 4.3 is a model released by x‑ai on 2026‑04‑17. It accepts text, image, and file inputs, produces text output, and supports a context window of up to 1,000,000 tokens. The model includes tool and reasoning support, is not released with open weights, and is priced at $1.25 per M input tokens and $2.50 per M output tokens.
- tool use
- structured outputs
- reasoning
At a glance
providerx-ai
releasedApr 17, 2026
context1M
input / M$1.25
Specifications
What the API gives you
- Context window
- 1M tokens
- Max output
- —
- Input price
- $1.25 / 1M tokens
- Output price
- $2.50 / 1M tokens
- Cache read
- $0.20 / 1M tokens
- Modalities
- text, image, file → text
- Knowledge cutoff
- —
- Released
- Apr 17, 2026
Recommendation coverage
Where this model appears
Measured evidence
Public benchmark record
- LMArena Agent
- -8.32026-07-13
- LMArena Agent
- -7.82026-07-20
- LMArena Vision
- 1235 Elo2026-07-12
- LMArena WebDev
- 1360 Elo2026-07-16
- LMArena WebDev
- 1361 Elo2026-07-20
LMArena data licensed CC-BY-4.0. Aider (Apache-2.0) and SWE-bench (MIT) are open.
Catalog data via OpenRouter and models.dev. Last checked within the past 6 hours.