Grok 4.3

xAI's current flagship with configurable reasoning effort and very low output pricing. Live X/web search available as add-on.

Grok 4.3 strengths

• Very competitive output pricing
• Configurable reasoning effort
• Real-time X and web search integration
• 1M context

Pricing & context

Cost guide: a typical call of about 10K input + 2K output tokens costs roughly $0.018 at list prices. Worth modelling against cheaper tiers before committing high-volume traffic.

When to choose Grok 4.3

Grok 4.3 is best for reasoning and agentic tasks needing current/real-time info and low output costs. If your workload is more cost-sensitive, weigh it against gpt-oss-120b (≈$0.03 input /1M) first.

Grok 4.3 FAQ

How much does Grok 4.3 cost?

Grok 4.3 is priced at $1.25 ($0.20 cached) per 1M input tokens and $2.50 per 1M output tokens (public API list price), with a 1M tokens context window. A typical call of about 10K input and 2K output tokens costs roughly $0.018.

What is Grok 4.3 best for?

Grok 4.3 by xAI is best for reasoning and agentic tasks needing current/real-time info and low output costs.

How does Grok 4.3 pricing compare to Claude Sonnet 5?

Grok 4.3 input costs $1.25 ($0.20 cached) per 1M tokens versus $2.00 for Claude Sonnet 5, roughly 1.6x less expensive on input. Output is $2.50 vs $10.00.

Is Grok 4.3 multimodal?

Grok 4.3 supports text, image.

Tools that use Grok 4.3