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Google upgrades Gemini models: Hydrogen replaces Flash, Decisions API cuts costs

Google is updating its Gemini models, with Gemini 4 Hydrogen set to replace Gemini 3.8 Flash due to a doubling in price and a significant performance increase. The new Hydrogen model offers a 2.5x speed boost and a 20-point improvement in the Artificial Analysis Intelligence Index benchmark, outperforming even the previous flagship, Gemini 4 Argon. Additionally, Google has introduced the Decisions API with the gemini-decision-1 model, which offers a substantial cost reduction for binary classification tasks by eliminating output token costs. AI

IMPACT Accelerates adoption of faster, more intelligent models and introduces cost-saving solutions for specific AI tasks.

RANK_REASON New model release from a frontier lab (Google) with performance and pricing details. [lever_c_demoted from frontier_release: ic=1 ai=1.0]

Read on dev.to — LLM tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Google upgrades Gemini models: Hydrogen replaces Flash, Decisions API cuts costs

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64 / 100
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Significant
New model release from a frontier lab (Google) with performance and pricing details. [lever_c_demoted from frontier_release: ic=1 ai=1.0]
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Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
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model release, product
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High
Clearly on-topic for AI-industry coverage.
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Breaking (< 6h)
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Full methodology in our editorial standards.

COVERAGE [1]

  1. dev.to — LLM tag TIER_1 English(EN) · Andrey Altrouter ·

    Migrating from Gemini 3.8 Flash to Hydrogen and Decisions API

    <p>The promo period for Gemini 4 Carbon ends on November 30, 2026. The discount on Gemini 3.8 Flash expires on December 31. Passing the old thinking budget parameter now breaks production with an HTTP 400 error. Developers need to update their agent architecture and avoid doublin…