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Model details

Gemini 3.5 Flash (Google Vertex AI)

Gemini 3.5 Flash is positioned within the broader Gemini family as a lightweight, latency-optimized variant intended for high-throughput production use, sitting in the same naming lineage as earlier Flash-tier releases. It targets developers who need responsive reasoning, tool use, and structured output behavior without the heavier cost profile of Pro-class Gemini models, making it a natural fit for agentic workloads, real-time chat assistants, and document understanding pipelines that ingest text, images, video, audio, and PDF inputs together. The model is offered through Google Vertex AI, giving teams enterprise-grade deployment, security, and integration with the surrounding Google Cloud stack rather than a self-serve open-weights route.

In qualitative terms, the model combines a multimodal encoder stack with a strong reasoning core, so it can interpret mixed document and media inputs and then return tightly formatted text outputs suitable for downstream automation. Its long context window makes it well suited to summarizing large reports, extracting structured records from lengthy PDFs, or powering agents that must hold extended dialogue history and tool state in memory. For practical fit, teams building retrieval-augmented assistants, code helpers, or workflow automation on Vertex AI can lean on Gemini 3.5 Flash as a cost-efficient default that still inherits the Gemini family's multimodal grounding and tool-calling maturity, while reserving larger Gemini variants for the heaviest reasoning or generation tasks.

LLM Gatewaygoogle-vertex/gemini-3.5-flashgemini-flash

Quick Info

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Provider
LLM Gateway
Model key
google-vertex/gemini-3.5-flash
Release date
May 19, 2026
Last updated
May 19, 2026
Knowledge cutoff
2025-01
Input modalities
Output modalities
Capabilities

Cost

Input token cost
$1.50
Output token cost
$9.00

Limits

Output tokens
65,536 tokens
Context window
1,048,576 tokens

Transparent token rates

Compare Gemini 3.5 Flash (Google Vertex AI) pricing

Rates are shown per one million tokens. Combined means one million input plus one million output tokens.

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Latest news about Gemini 3.5 Flash (Google Vertex AI)

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Coverage

According to MLQ News coverage from May 20, 2026, Google introduced Gemini 3.5 Flash as the new default model for Gemini search and core applications at its I/O event, emphasizing lower latency and lower cost for large-scale deployment. The article explicitly names Gemini 3.5 Flash and describes it as positioned alongs The same report ties the Gemini 3.5 family to Google's broader agent-era push, including the Spark always-on personal AI agent that acts across Gmail, Calendar, and Docs. For developers reaching Gemini 3.5 Flash through LLM Gateway's Vertex AI route, the coverage confirms the model's role as Google's cost-/latency-opti

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Coverage

At Google I/O 2026, Google announced Gemini 3.5 Flash alongside Gemini Omni, positioning 3.5 Flash as the first in its latest family combining frontier intelligence with action. The announcement frames it as a step forward in agentic and coding performance for production workloads. The launch coincided with a restructuring of Google's consumer AI subscription pricing, reshaping how customers access the new models. This third-party recap provides launch-window context for Gemini 3.5 Flash but covers limited technical detail beyond Google's positioning statement.

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CoverageRelease Notes

Google has released Gemini 3.5 Flash as generally available (GA) and production-ready, marking it as the most intelligent Flash model in the lineup. It delivers sustained frontier performance in agentic execution, coding, and long-horizon tasks at scale, with model ID gemini-3.5-flash for API access. The release introduces behavioral changes including a new default effort level of medium and thought preservation across turns, while deprecating legacy sampling parameters and the thinking_budget in favor of effort-level controls. Function-calling improvements add strict response matching, multimodal function responses, inline instructions, and reduced unnecessary tool calls, with migration guidance provided for Gemini 3 Flash Preview and Gemini 2.5 users.

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