Grok 4.3 Beta specs, prices, where it runs and its benchmark standing

Name: Grok 4.3 Beta
Author: SpaceXAI

closed weights · top 10 on 0 of 6 · released Apr 17, 2026

Provider: SpaceXAI
Release date: Apr 17, 2026 · Pricing lists Apr 30, 2026; Boards
Parameters: Not disclosed by SpaceXAI
Modalities: Text, Image, Files to Text; OpenRouter
License: Proprietary; LMArena
Context window: 1M tokens; Pricing
Pricing: $1.25 in / $2.5 out per 1M tokens; All prices
Hosting: 5 priced API routes · Azure OpenAI (31 regions) · OpenRouter; Pricing Regions
Weights: Closed weights
Benchmarks: 6 boards captured

Rank	Board	Category	Score	Of
24	Search ArenaAgents and tools · as “Grok 4.3”	Agents and tools	1,193	40
53	GPQA DiamondReasoning · as “grok-4.3_high”	Reasoning	88.8%	100
54	Vision ArenaVision · as “Grok 4.3”	Vision	1,241	85
63	Epoch ECIReasoning · as “Grok 4.3 Beta”	Reasoning	150.0	100
63	LiveBenchReasoning · as “grok-4.3”	Reasoning	62.3%	64
79	Text ArenaChat · as “Grok 4.3”	Chat	1,442	84

Versions and release history

11 versions in this line since Feb 19, 2025, from Pricing, OpenRouter and the boards.

Category ranks, more models and catalog changes