Google, Meta launch Gemini 3.8 Flash and Muse Spark 1.3
Google released Gemini 3.8 Flash and a cyber variant while Meta released Muse Spark 1.3 hours apart; independent benchmarks split on agentic work, reasoning, recall and coding.
Google and Meta released competing frontier AI models on Wednesday. Google introduced Gemini 3.8 Flash and a cybersecurity variant, and Meta rolled out Muse Spark 1.3 via Muse Code and the Meta Model API.
Google described Gemini 3.8 Flash as its third Flash update in six weeks, highlighting improvements in software engineering, multi-step reasoning and agentic tasks. The company set introductory pricing at $0.75 per 1 million input tokens and $3.75 per 1 million output tokens through Dec. 31, 2026; prices double after that date. Google also released Gemini 3.8 Flash Cyber for a limited set of trusted defenders through the Fairwind Program. The cyber variant scored 86.2% on CyberGym and 47.2% on CWE-Bench, and Google reported it produced 2.6 times more correct patches for Chrome vulnerabilities than larger commercial models.
Meta said Muse Spark 1.3 reduces tool calls compared with version 1.2, with engineers reporting roughly 20% fewer calls. Meta did not ship its top “max” reasoning variant at rollout, citing additional safety testing; a lower-tier “xhigh” variant is available. The xhigh variant scored 61 on the Artificial Analysis Intelligence Index, four points above Muse Spark 1.2.
Independent testing by Artificial Analysis produced mixed results. On GDPval-AA v2 Elo, Muse Spark 1.3 in max mode scored 1,754 while Gemini 3.8 Flash in high mode scored 1,545. Muse also led the Sierra Research banking agent test, 52.4% to 44.9%, and performed better on the CritPt physics reasoning benchmark. Gemini led Terminal-Bench 2.1 with an 87.6% score, posted 81% on AA-LCR long-context tests and reached 55% on AA-Omniscience accuracy. Gemini 3.8 Flash posted the highest GPQA Diamond score at 95%. The two models finished within one point on Humanity’s Last Exam.
In posts on X, Google CEO Sundar Pichai wrote that the release “delivers significant leaps from 3.7 Flash across software engineering, agentic tasks, and multi-step reasoning.” Meta CEO Mark Zuckerberg described Muse Spark 1.3 as “the biggest jump we’ve made so far on coding and agentic work.”
Meta said additional releases are planned, including open-weight versions. Other providers have indicated near-term updates, and several companies are limiting access to higher-risk capabilities to vetted defenders or specialized programs.
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