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Practical Gemini 4 guides: model access, Argon chat, saved conversations and token usage.

Compare access, intended uses and practical differences before choosing a Gemini 4 model.

Start a text conversation, write a useful prompt, check the answer and find your usage receipt.

Find the official Carbon announcement, distinguish limited access from public access and follow availability here.

Find account history, resume a conversation and export your work without losing context.

Understand input, cached input, thinking output, reservations and the final charge for a reply.