Grok 4.3
Value tier of xAI's current lineup with a 1M-token context window, below Grok 4.5 on price.
Pricing
Input$1.25 / 1M checked Jul 19, 2026
Output$2.50 / 1M checked Jul 19, 2026
Rates double above a prompt-length threshold: $2.50 in / $5 out per 1M. See xAI pricing.
Cost bandBudget
Free tierNo free API tier.
Limits
Context window1M checked Jul 19, 2026
DeploymentxAI API
OpenAI-compatible APIYes
ModalitiesText, Image input
Where it fits
Best forCost-sensitive agents and long-context work on the xAI stack.
Business fitRoughly a third of Grok 4.5's output price with double the context window.
Capabilities
ReasoningFunction callingStructured outputs
Change history
- Jul 19, 2026New modelGrok 4.3 added to the index $1.25 in / $2.50 out per 1M base tier, 1M context. xAI models and pricing
Data
Last checkedJul 19, 2026
Cross-checked againstopenrouter.ai/x-ai/grok-4.3
Verify with provider documentation before committing spend. Report an error and it gets fixed with a logged correction.