Grok 4 is xAI’s flagship reasoning model, launched on 9 July 2025 as the successor to Grok 3. It pairs native chain-of-thought reasoning with multimodal understanding, accepting both text and image input and returning text. The model ships with a 256,000-token context window and was, at release, xAI’s most capable system, posting strong results on reasoning and tool-use benchmarks such as Humanity’s Last Exam and ARC-AGI, aided by real-time access to X and the web.<\/p>\n
Access is entirely proprietary: there are no open weights, and the model runs through the xAI API, the Grok apps, and the SuperGrok subscription. API pricing sits at $3 per million input tokens and $15 per million output tokens, placing it in the same bracket as frontier models from OpenAI and Anthropic rather than the budget tier.<\/p>\n
Verdetto:<\/strong> Grok 4 is a genuine frontier-class reasoner with strong benchmarks and live search, but it is not cheap and has since been joined by faster, lower-cost variants (Grok 4 Fast, 4.20, 4.3). Choose it for hard reasoning inside xAI’s ecosystem; reach for a newer variant when latency or price matters more than peak capability.<\/p>","protected":false},"excerpt":{"rendered":" Grok 4 is xAI’s flagship reasoning model, launched on 9 July 2025 as the successor to Grok 3. It pairs […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"cm_developer":"xAI","cm_model_type":"Large language model (reasoning)","cm_modality":"Text + image input, text output","cm_parameters":"Undisclosed","cm_context_window":"256,000 tokens","cm_max_output":"Undisclosed","cm_license":"Proprietary","cm_open_weights":"no","cm_release_date":"July 9, 2025","cm_input_price":"3","cm_output_price":"15","cm_api_providers":"xAI API, OpenRouter, Vercel AI Gateway","cm_vram_fp16":"","cm_vram_q4":"","cm_min_gpu":"","cm_benchmarks":"","cm_official_url":"https:\/\/x.ai\/news\/grok-4"},"class_list":["post-1539","ai_model","type-ai_model","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/convly.ai\/it\/wp-json\/wp\/v2\/ai_model\/1539","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/convly.ai\/it\/wp-json\/wp\/v2\/ai_model"}],"about":[{"href":"https:\/\/convly.ai\/it\/wp-json\/wp\/v2\/types\/ai_model"}],"wp:attachment":[{"href":"https:\/\/convly.ai\/it\/wp-json\/wp\/v2\/media?parent=1539"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}