Grok 4.5
xAI's flagship, positioned by xAI as its most intelligent and fastest model, for coding, knowledge work, and STEM.
Pricing
Input$2 / 1M checked Jul 19, 2026
Output$6 / 1M checked Jul 19, 2026
Rates double above a prompt-length threshold: $4 in / $12 out per 1M. See xAI pricing.
Cost bandBalanced
Free tierNo free API tier.
Limits
Context window500k checked Jul 19, 2026
DeploymentxAI API
OpenAI-compatible APIYes
ModalitiesText, Image input, PDF input
Where it fits
Best forCoding and general frontier workloads on the xAI stack; xAI's own recommendation for everything outside specialized builds.
Business fitAggressive base pricing for a flagship; budget for the doubled long-prompt tier.
Capabilities
ReasoningFunction callingStructured outputsWeb-native tools
Change history
- Jul 8, 2026New modelGrok 4.5 added to the index $2 in / $6 out per 1M base tier ($4/$12 above the prompt-length threshold), 500k context. xAI models and pricing
Data
Last checkedJul 19, 2026
Cross-checked againstopenrouter.ai/x-ai/grok-4.5
Verify with provider documentation before committing spend. Report an error and it gets fixed with a logged correction.