xAI · AI model API pricing

How much does Grok 4.3 cost?

The value pick of the mid tier — output tokens at $2.50 undercut everything of comparable class.

Rate card

What that means per month

Standard on-demand rates from xAI's official model docs, last checked 2026-07-28. Rates shown are for prompts under 200k tokens; above that, prices double. Monthly figures exclude caching and batch discounts. Confirm live pricing before committing.

Where Grok 4.3 sits on price

At the reference month of 10M input and 3M output tokens, Grok 4.3 costs $20, which makes it the 12th cheapest of the 30 models tracked here. That is 12× the price of Qwen-Flash, the cheapest model at this mix ($1.70). Among the 11 mid-tier models it ranks 5th, behind MiniMax M3 at $6.60.

Cache economics

Cached input on Grok 4.3 bills at $0.20 per 1M — 16% of its own input rate, against a 10% median across the models here that publish a cached-read price. 21 models discount cached reads more steeply than this. On the reference month, serving 80% of that input from cache takes the input side of the bill from $12.5 to $4.10, leaving output untouched at $7.50 — which is why a high reuse rate changes the ranking above rather than just shaving the total.

Cache reads only. Writes are billed separately by some providers and are excluded here — see the rate note above for xAI's terms. Try it at your own hit rate on the AI cost calculator.

Cheaper alternatives

At a reference workload of 10M input / 3M output tokens a month, these cost less than Grok 4.3 ($20/mo):

• GLM-4.7 $12.6/mo
• Mistral Large 3 $9.50/mo
• DeepSeek V4 Flash $8.36/mo

Grok 4.3 head-to-head