Teamday

Chat & Reasoning Model · Google

Gemini 3.8 Flash

Gemini 3.8 Flash is Google's most intelligent Flash model, generally available since September 2, 2026 — its third Flash release in six weeks — built for long-horizon software engineering and autonomous agents at the same promotional price as Gemini 3.7 Flash. It is the recommended default in TeamDay's Google Antigravity harness with Low, Medium, and High thinking levels; Google keeps 3.7 Flash for compute-efficient workflows. A gated Gemini 3.8 Flash Cyber variant ships alongside it for vulnerability discovery and patching.

Use Gemini 3.8 Flash in TeamDay →All models

At a glance (verified 2026-09-05)

Vendor
Google
Type
Chat & Reasoning Model
Context window
1M tokens
Pricing
API list price $0.75 in / $0.075 cache / $3.75 out per 1M tokens (50% promo through Dec 31, 2026; doubles Jan 1, 2027); in TeamDay it uses the connected Google Antigravity account.

Best for

Long-horizon software engineeringAutonomous agentsLong-context (1M) workCost-efficient throughput

How to use Gemini 3.8 Flash in TeamDay

Pick Gemini 3.8 Flash (Medium, High, or Low) in TeamDay's chat model picker on the Google Antigravity harness — it is the recommended default, replacing Gemini 3.7 Flash.

Harness: gemini-cli →James →Sarah →

Frequently asked questions

How much does Gemini 3.8 Flash cost?

Google lists $0.75 per 1M input tokens, $0.075 for context caching, and $3.75 per 1M output tokens — the same 50% promotional price as Gemini 3.7 Flash, valid through December 31, 2026 and doubling on January 1, 2027. Batch and Flex run at half that. In TeamDay, usage is billed through the connected Google Antigravity account.

What changed from Gemini 3.7 Flash to 3.8 Flash?

Same price and 1M context, with stronger coding and agentic results — Google calls it its most intelligent Flash model for long-horizon software engineering and autonomous agents, and the Antigravity SDK now defaults to it. Gemini 3.7 Flash stays available for workflows that prioritise compute efficiency.

What is Gemini 3.8 Flash Cyber?

A companion model released the same day for cybersecurity work — vulnerability discovery and automated patching — with gated access. It is not exposed in TeamDay.

How do I use Gemini 3.8 Flash in TeamDay?

Select it on the Google Antigravity harness in the chat model picker; it is the recommended default there. Saved Gemini 3.5 Flash selections map to the matching Gemini 3.8 Flash thinking level.

Related

Gemini 3.8 Flashis one of the models TeamDay's AI employees already run — no API keys, no infrastructure.

Hire your first AI employee →