Google Launches Gemini 3.8 Flash With DeepSWE Lead and Cyber Model

Summary

Google released Gemini 3.8 Flash on September 2, 2026, its third Flash model in six weeks, while no frontier Gemini Pro model has arrived since early 2026 and the reportedly delayed Gemini 3.5 Pro remains absent. Google calls 3.8 Flash its best reasoning and coding model yet. Standard Flash targets agentic tasks and software development, while Flash Cyber shares its foundation but is tuned to detect and mitigate vulnerabilities. API access costs $0.75 per million input tokens and $3.75 per million output tokens through 2026, then rises to $1.50 and $7.50, as rival labs also cut prices to retain business users.

Google's benchmarks show marginal gains over Gemini 3.7 Flash on most tests but larger coding improvements. Gemini 3.8 Flash leads the DeepSWE software engineering leaderboard at its discounted cost. Its OSWorld 2.0 computer-use score improved but remains far behind Claude Opus, while GPT also performs poorly. Flash Cyber replaces version 3.5; Google says internal tests found more vulnerabilities and produced working patches more often. Chrome measured a 2.6 times increase in patch accuracy, and Google Cloud says the model found a critical vulnerability in two hours, with Wiz and Palo Alto Networks providing endorsements. Standard Flash is available across Google's ecosystem, requiring Pro or Ultra in the Gemini app, with free access through AI Studio. Cyber remains limited to trusted testers and governments.