Gemini 3.8 Flash

google/gemini-3.8-flash

A chat model with a 1M-token context window, at $0.7875 per million input tokens and $3.9375 per million output tokens.

Details

Maker: google
Kind: Chat
Context window: 1,000,000 tokens
Max output: 65,535 tokens
Input: $0.7875 per million tokens
Cached input: $0.07875 per million tokens, 90% off
Cache write: Same as input
Output: $3.9375 per million tokens
Capabilities: Reasoning, tool use, vision, file input, web search
Takes: Text, image, pdf, video
Returns: Text
Zero data retention: Not on every provider
No training on requests: Yes, on every provider
Released: 2026-09-02

Description

Gemini 3.8 Flash is the high-efficiency, cost-effective powerhouse of the Gemini 3 family. It delivers Pro-level agentic capabilities, major leaps in code generation and terminal execution. 3.8 Flash serves as the primary agentic workhorse in the Gemini 3 family, bridging the gap between deep-reasoning Pro models and high-throughput Flash-Lite models while delivering high token efficiency and multi-step multimodal processing.

Call it

curl

curl https://phantom.codes/v1/chat/completions \
  -H "Authorization: Bearer $PHANTOM_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemini-3.8-flash",
    "messages": [
      {"role": "user", "content": "Hello"}
    ]
  }'

Set PHANTOM_KEY to your key. Any OpenAI client works with the base URL https://phantom.codes/v1.

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