Gemini 3.5 Flash

google/gemini-3.5-flash

A chat model with a 1M-token context window, at $1.575 per million input tokens and $9.45 per million output tokens.

Details

Maker: google
Kind: Chat
Context window: 1,000,000 tokens
Max output: 64,000 tokens
Input: $1.575 per million tokens
Cached input: $0.1575 per million tokens, 90% off
Cache write: Same as input
Output: $9.45 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: 2026-05-19
Newer model: google/gemini-3.8-flashReleased later by the same maker, costs no more, and lists the same capabilities. Compare the two

Description

Google's latest model, highly optimized for coding proficiency and parallel agentic execution loops. Defaults to medium thinking effort for faster and more cost-efficient responses.

Call it

curl

curl https://phantom.codes/v1/chat/completions \
  -H "Authorization: Bearer $PHANTOM_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemini-3.5-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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