Google rolls out Gemini 4 Hydrogen, finally replacing 3.8 Flash
Summary
Google has replaced Gemini 3.8 Flash with Gemini 4 Hydrogen across its products. The model is available to AI Pro and Ultra subscribers and through Google Search, while free and AI Plus users still have access to the older 3.5 Flash-Lite model in the Gemini app and AI Studio.Key Facts
- Hydrogen offers four thinking levels: low, medium, high, and xhigh.
- Google says Hydrogen runs 2.5 times faster than Gemini 3.8 Flash in high mode and reduces fabricated claims by more than five times.
- Hydrogen scored more than three times as high as Gemini 3.8 Flash on Terminal-Bench, a coding benchmark.
- Hydrogen scored 54 on the Artificial Analysis Intelligence Index in xhigh mode, compared with 50 for Argon.
- Google is adding Hydrogen to Search to handle longer, multipart questions and to provide more visual responses in AI Overviews and AI Mode.
- Developers can access Hydrogen through the API for $1.50 per million input tokens and $7.50 per million output tokens.
- Google positions Argon and Carbon for long-running tasks and security, while Hydrogen targets faster code generation and testing.
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