Google Launches Gemini 4 Argon With 1M Token Output Limit and API Access

Google has released Gemini 4 Argon, its latest frontier reasoning model, now available through the Gemini API. A headline capability is the 1 million token output limit, making it suited for long-form code generation, document synthesis, and complex multi-step reasoning tasks at scale. The model is rolling out in the Gemini app and Antigravity platform but is currently restricted to paid tiers. Developers building with the API gain access to what Google positions as its hardest-problem-solving model to date, with an accompanying safety and responsibility post detailing evaluation methodology. This is one of the more significant API-accessible model releases in recent months and warrants immediate benchmarking for any team currently evaluating frontier reasoning models.