Grok 4.3
SpaceXAI· released 30 Apr 2026
x-ai/grok-4.3- Input / 1M tokens
- $1.25
- Output / 1M tokens
- $2.5
Longest answer: 900K tokens
About
Grok 4.3 is a reasoning model from SpaceXAI for agentic workflows, instruction-following tasks, and applications requiring high factual performance. It accepts text, image, and file inputs and produces text. The model supports tools and reasoning, with a context window of 1,000,000 tokens and a maximum output of 900,000 tokens. It was released on 2026-04-30. Input costs 1.25 USD per 1M tokens; output costs 2.5 USD per 1M tokens. For builders, the combination of file and image input, tool support, and long context provides the key integration characteristics. Teams can assess the model against text-oriented applications that need multimodal input and reasoning, while considering its distinct input and output prices.
Who it is for
It suits teams building agentic or instruction-following applications that need text, image, or file input. It may fit tasks where high factual performance is a stated requirement.
What is good
- Accepts text, image, and file inputs.
- Supports tools and reasoning.
- Context window is 1,000,000 tokens.
- Maximum output is 900,000 tokens.
What to know first
- Input costs 1.25 USD per 1M tokens.
- Output costs 2.5 USD per 1M tokens.
Verdict
Grok 4.3 combines reasoning and tool support with image and file input. Its large context and output limits may matter for longer tasks, alongside its token pricing.
Details
- Lab
- SpaceXAIopenrouter.ai · 3 Oct 2026
- Context
- 1,000Kopenrouter.ai · 3 Oct 2026
- Input price
- $1.25 / 1Mopenrouter.ai · 3 Oct 2026
- Output price
- $2.5 / 1Mopenrouter.ai · 3 Oct 2026
- Max output
- 900,000 tokensopenrouter.ai · 3 Oct 2026
- Inputs
- text, image, fileopenrouter.ai · 3 Oct 2026
- Open weights
- Noopenrouter.ai · 3 Oct 2026
More newest models
See the list
Listed on Inferse
- Newest Models in 2026466 listed
- Longest-Context Models in 2026466 listed
- Cheapest Language Models in 2026437 listed
- Models with Tool Calling in 2026395 listed
- Reasoning Models in 2026332 listed
- Vision Language Models in 2026295 listed
- SpaceXAI Models: Pricing per 1M Tokens and Context (2026)8 listed
Sources
- openrouter.ai/x-ai/grok-4.3· checked 3 Oct 2026