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Google releases Gemini 3.8 Flash and cybersecurity variant

The updated models target agentic reasoning and software engineering, alongside a restricted edition for defensive cyber operations.

Updated Sep 2, 2026 · 16:18 UTC3 reports

The short version

  • Google launched Gemini 3.8 Flash for general developers and consumers, alongside Gemini 3.8 Flash Cyber for authorized security defenders.
  • The standard model builds on Gemini 3.7 Flash with enhanced coding, multi-step reasoning, and customizable effort levels at the same introductory pricing.
  • The cybersecurity version is restricted under the Fairwind Program to vetted organizations for automated vulnerability detection and patching.

Key facts

  • Gemini 3.8 Flash supports multimodal inputs up to a 1 million token context window and 64,000 output tokens.[Hacker News]
  • Gemini 3.8 Flash is offered at an introductory price of $0.75 per million input tokens and $3.75 per million output tokens through December 31.[Hacker News · 9to5Google]
  • Gemini 3.8 Flash Cyber is restricted to authorized partners, government authorities, and critical infrastructure defenders through Google's Fairwind Program.[Hacker News · 9to5Google]
  • Google reported that internal testing with its Chrome Security team showed 3.8 Flash Cyber produced 2.6 times more correct vulnerability patches than larger commercial models.[Hacker News · 9to5Google]
  • The model is deployed across consumer tools including the Gemini app and Google Sheets for subscribers, as well as developer environments like the Gemini API, Google Antigravity, and AI Studio.[Hacker News · 9to5Google · Hacker News]

What remains uncertain

  • The model's knowledge cutoff date varies by subject, reaching March 2026 for some areas but remaining limited to January 2025 for others.[9to5Google · Hacker News]
  • Google noted slight regressions in safety performance for non-English languages during automated evaluation testing compared to Gemini 3.7 Flash.[Hacker News]

Sources