Grok 4.3
xAI · released 2026 · proprietary API
xAI's fastest + most intelligent GA model; native real-time X / web search.
Context window
1M
1,000,000 tokens
Input price
$1.25
per 1M tokens
Output price
$2.50
per 1M tokens
Blended
$1.56
3:1 in:out mix
Weights
Proprietary
API only
Released
2026
xAI
Long-context / tier pricing — Requests over ~200K tokens billed at a higher tier. Listed prices are the base rate for prompts up to ~200K tokens.
Where it ranks
Of the 16 models tracked, Grok 4.3 is #5 cheapest to run (blended $/1M at a 3:1 input:output mix), #7 by input price, and #2 (tied) by context window.
See the full Frontier Index →Compare with
The nearest models by blended cost to run.
Put it to work
Specs from BitByteCore's hand-verified Frontier Ledger (v2026-07-04, verified 21 Jun 2026). Model pricing moves fast — confirm with xAI before you rely on a figure.