Model components / Fine-tuned / chat models

Gemini 3.5 Flash

Google's price-performance Gemini tier, released at I/O 2026 on 19 May 2026 as the first Gemini 3.5 model and the default in the Gemini app. It is a thinking and agentic instruct model with configurable thinking budgets that trade reasoning depth for latency, reached through the Gemini app, AI Mode in Search, Antigravity, the Gemini API and enterprise surfaces.

Scored here for finetuned_chat, calibrated to the Gemini 3.5 Flash anchor. Consolidated 2026-07-29 from gemini-2-5-flash; openness follows the governing release. Verified 2026-08-13 via the Gemini 3.5 launch post, the DeepMind model index and Google's API model documentation.

Openness

1 high confidence

1.0

weights: closed
data: closed
code: closed
license: Proprietary(Gemini app/Search/API/enterprise, no downloadable weights)

Proprietary and API-only across the Flash line, no downloadable weights, so 1/closed. Gemini 3.5 Flash governs as the current release and is a genuine capability jump - it scores 5 where 2.5 Flash scored 3 - which is why the versions were worth combining rather than keeping the older figure. Held apart from Gemini Pro, which Google prices and positions as a separate tier.

https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-5/ recorded 2026-08-13
proprietary launch across Gemini app/Search/API/enterprise, no open weights and no corpus or training code
https://deepmind.google/models/gemini/ recorded 2026-08-13
DeepMind's model index lists Gemini under the API and app products and files Gemma separately under an "Open models" heading; no weight download for Gemini

Adoption

5 medium confidence

5.0

High-volume cheap tier powering the Gemini app and AI Mode in Search plus heavy API/Vertex traffic; Gemini app >750M MAU (TechCrunch, Feb 2026). Flash is the default high-volume serving model so its real usage is firmly >10M-equivalent. Attributed to the app/Search surface, not a standalone download count.

https://techcrunch.com/2026/02/04/googles-gemini-app-has-surpassed-750m-monthly-active-users/ recorded 2026-08-13
"Google's Gemini app has surpassed 750M monthly active users"
https://ai.google.dev/gemini-api/docs/models recorded 2026-08-13
Google's API model index, where the Flash line is the high-volume low-latency production tier

Capability

5 high confidence

5.0

Frontier tier, at the top right of the Artificial Analysis Intelligence Index and level with the frontier flagships. Figures are Google-reported.

https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-5/ recorded 2026-08-13
"outperforming Gemini 3.1 Pro on challenging coding and agentic benchmarks like Terminal-Bench 2.1 (76.2%), GDPval-AA (1656 Elo) and MCP Atlas (83.6%), and leading in multimodal understanding (84.2% on CharXiv Reasoning)"; "Landing in the top-right quadrant of the Artificial Analysis" index

Verified 2026-08-13