Release4 sources

Artificial Analysis' Intelligence Index: Gemini 4 Hydrogen nearly ties Claude Sonnet 5.5 and GPT-6.1 Sol, at a third of Sonnet's cost but ~2.5x that of Sol (@artificialanlys)

The Brief · written from 4 sources

Google released Gemini 4 Hydrogen, available globally in Search for all users with improved intent understanding and broader link discovery
The model handles multi-part questions, typos and highly specific requests better, breaking questions down and addressing each part
Artificial Analysis places Gemini 4 Hydrogen's Intelligence Index just below Claude Sonnet 5.5 and GPT-6.1 Sol, at about a third of Sonnet's cost but roughly 2.5x that of Sol

Why it matters

Developers building on Google Search, AI Studio or the Gemini API get a new default model with claimed better handling of complex queries, and the coding agent orchestration approach may change how multi-model coding tools are built.

Who’s affected

Developers using Google Search or AI Mode
Developers using AI Studio or the Gemini API
Teams evaluating coding agents

Gemini 4 Hydrogen
Gemini 4 Carbon
Claude Sonnet 5.5
GPT-6.1 Sol
#gemini
#google
#llm
#search
#coding-agents

@artificialanlys : Artificial Analysis' Intelligence Index: Gemini 4 Hydrogen nearly ties Claude Sonnet 5.5 and GPT-6.1 Sol, at a third of Sonnet's cost but ~2.5x that of Sol — Google's new Gemini 4 Hydrogen has Intelligence just below Claude Sonnet 5.5 and GPT-6.1 Sol, at…

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