Gemini 3.5 Flash-Lite

Spec

Attribute	Value
Developer	Google DeepMind
Released	2026-07-21
Announced	2026-07-21
Context window	1,048,576 tokens (1M)
Pricing	$0.30/M input · $2.50/M output
License	proprietary
Availability	Gemini API, Google AI Studio, Vertex AI

Benchmarks

Benchmark	Gemini 3.5 Flash-Lite	Gemini 3.1 Flash-Lite (predecessor)
Terminal-Bench 2.1	54%	31%
GDM-MRCR v2 (long-context)	72.2%	60.1%
GDPval-AA v2	1140	642
AA Intelligence Index	+11 pts over predecessor	baseline
Time per task	~halved vs. predecessor	baseline
Output speed	350.2 t/s	unknown

Use Cases

• High-throughput, low-latency agentic pipelines (agentic search, document processing)
• Cost-sensitive applications requiring millions of calls per day
• Fast classification, routing, and summarization at scale

Key Differentiators

• Cheapest production Gemini model: $0.30/$2.50 per 1M tokens
• Speed: 350.2 t/s — significantly above the category median (~107 t/s)
• Configurable thinking levels: supports fast and deep reasoning modes
• Positioned as the high-throughput tier complementing Gemini 3.6 Flash

Related

• Google DeepMind — developer
• Gemini 3.6 Flash — higher-performance sibling, released same day
• Gemini 3.5 Flash Cyber — security-specialized sibling, released same day
• Agents (LLM Agents) — primary deployment context

Conflicting Reports

• The published price disagrees with the catalogue's first-party endpoint, and the page's figure stands. spec-check run 90 (2026-09-12) reports input $0.3 vs $0.15; output $2.5 vs $1.25, both 2.0× against Google (1차) (source).

  The Spec row is not changed. Per CLAUDE.md, a page that cites a vendor announcement keeps the vendor's figure, and the cell above is faithful to the announcement this page cites. What was missing was the disclosure, which is what the schema asks for and what this entry supplies.

  What is not established: which figure is correct, and what the catalogue's price is a price for — no tier, context band, modality or billing unit appears in the check's output. The ratio is an exact small-integer multiple in both cells at once, and it is on six of the eight conflicting pages, which is the shape of a tier or unit mismatch rather than of six independent errors — recorded as a pattern and not adopted as an explanation (source).

  This has been reported by a red Action on every run since 2026-08-29 — 25 consecutive — and had reached no page until 2026-09-13. openrouter.ai is blocked from the daily run's sandbox, so the catalogue cannot be re-read here to settle it; that is a question for a run with egress.

Sources

• Google Blog (July 21, 2026): https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-6-flash-3-5-flash-lite-3-5-flash-cyber/
• DeepMind Flash-Lite page: https://deepmind.google/models/gemini/flash-lite/