Gemini 4 Argon by Google Frontier coding

Chat with Gemini 4 Argon for free

Gemini 4 Argon is Google's new frontier model for real-world coding and knowledge work, with a 1M-token window and long-form output. Start typing, no sign-up needed.

Free in ChatdaySwitch models any timeCompare with other models

Live preview

See how Gemini 4 Argon thinks

Pick a task and watch a sample answer stream in. Open the same prompt in Chatday when you’re ready.

Why does this return undefined? const u = users.find(u => u.id = id)

The bug is in the arrow body: u.id = id assigns instead of compares, so the callback returns the assigned value and .find never matches the way you expect.

Fix it with a strict comparison:

const u = users.find(u => u.id === id);

Use === to compare. A single = is assignment, which is why you saw undefined.

Illustrative preview: your real answers run in Chatday. Continue in Chatday

Strengths

What makes Gemini 4 Argon stand out

State-of-the-art multi-step reasoning

Strong coding and tool use

Native vision understanding

1M-token context window

Sustains long-running agentic tasks

At a glance

Gemini 4 Argon specifications

Context window

Max output

Text · Vision · Video · Code

Modality

Frontier

Speed

Free & Pro

Available in Chatday

Provider	Google
Model family	Gemini 4 series
Context window	1,000,000 tokens
Max output	1,000,000 tokens
Modality	Text · Vision · Video · Code
Input price	$2 / 1M tokens
Output price	$10 / 1M tokens
Tool / function calling	Yes
Vision	Yes
Streaming	Yes
Available in Chatday	Free & Pro

Pricing shown for reference; usage is included in your Chatday plan.

Side by side

Gemini 4 Argon vs other top models

Compare

Model	Context	Best at	Input price	In Chatday
Gemini 4 Argon	1M	Frontier coding	$2/M	Free
GPT-6.1	1.1M	Agentic coding	$2/M	Free
Claude Opus 5.5	1M	Flagship reasoning	$4/M	Free
Grok 4.7	500K	Agentic coding	$2/M	Free

FAQ

Gemini 4 Argon questions

Yes. Gemini 4 Argon is available on the free plan with daily limits. Pro raises the limits and adds priority access during peak times.

1M tokens: enough for very long documents, large codebases or extended conversations without losing earlier context.

Reach for Gemini 4 Argon on the tasks it’s built for, then switch models mid-chat in Chatday when another one fits better, no need to leave the conversation.

Yes. Gemini 4 Argon accepts image input, so you can share screenshots, diagrams and photos and ask it to reason over them.