Gemini 4 Hydrogen

GA/stable ('Stable: gemini-4-hydrogen' on the model page; the November 12, 2026 release note is headed 'Gemini 4 Hydrogen (gemini-4-hydrogen) generally available (GA)'), described by Google as bringing 'cutting-edge intelligence to everyone, with speed and efficiency for everyday coding and agentic workflows'. Single-column pricing - unlike gemini-4-carbon and gemini-4-argon, the pricing page publishes no dated schedule for this model: paid-tier Standard is $1.50 in / $7.50 out per 1M (output including thinking tokens) with implicit context caching at $0.075/1M; the What's-new page states the same three figures and calls the cached rate a 95% discount. Other published tiers, none of which fit the per-MTok fields: Batch and Flex $0.75 in / $3.75 out (caching $0.0375); Priority $2.70 / $13.50 (caching $0.135). Available on the Free tier (Standard and Priority free-tier cells read 'Free of charge'; Batch and Flex are paid only). Caching is implicit only - Google states explicit caching is not supported, so no cache storage fee is published. Grounding with Google Search or Maps: 5,000 requests/month free shared across all Gemini 3 and newer models, then $14 per 1,000 (paid tier only). Spec table gives a 1,048,576-token context window that Google labels a 'unified input and output token limit', and max output 65,536 (default synchronous) / up to 1,048,576 with long decode - max_output_tokens carries the default synchronous figure. Inputs text/image/video/audio/PDF, output text; thinking at low, medium, high (default) and a new xhigh level; computer use, code execution, file search, function calling, structured outputs, URL context and grounding supported; Live API, audio generation and image generation not supported. Google calls it the 'recommended upgrade from Gemini 3.8 Flash and earlier Gemini 3 and 2.5 models' and makes it the default model of the Antigravity agent in Gemini Managed Agents - that is a recommendation, NOT a deprecation: the deprecations page declares no shutdown for gemini-3.8-flash, so that row is unchanged and replacement here stays null. Released 2026-11-12 per the API release notes and the 'Gemini 4 models' table of the deprecations page, which lists it with 'No shutdown date announced' and no replacement; the model page's 'Latest update' field carries the date more coarsely as 'November 2026'. Google publishes no knowledge cutoff on the model page, pricing page, What's-new page or release note, so that stays null. First read 2026-11-13.

Source: Google official documentation ↗

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