> Gemini 3.5 Flash is a closed AI model from Google, released 19 May 2026. Index score 165 (GPT-4 = 100), rank 32 of 229 ranked models. API price $1.5 in / $9.0 out per million tokens, 1.05M context. [Models](https://themodelindex.org/models/) /[Google](https://themodelindex.org/labs/google/) # Gemini 3.5 Flash Google Released 19 May 2026 Closed Flagship Date verified [Compare](https://themodelindex.org/compare/gemini-3-5-flash-vs-glm-5-2/) [Announcement](https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-5/?_bhlid=25af37ed31cbc0806de888e382fe92e66a1318da&trk=article-ssr-frontend-pulse_little-text-block) 165154–176 Index score #32 of 229 models 5/ 8 Core tests taken 5 of 6 areas · plus 14 anchor tests −12 Versus the frontier at release best then: GPT-5.5 Replaced by [Gemini 3.6 Flash](https://themodelindex.org/models/gemini-3-6-flash/) $1.5/ $9.0 Price per million tokens input / output, list price 1.05M Context window tokens it reads at once ## Where it sits · on the frontier _Chart: Model Index score of every scored model since late 2022, with the best closed and best open model over time_ Claude Opus 4.6 reached this score 3 months earlier. ## Test results · by area · tick = best by any model Show 12 anchor tests Reasoning & knowledge evidence GPQA Diamond 93% Humanity's Last Exam no result Maths evidence FrontierMath T1-3 63% Coding evidence SWE-bench Verified 79% Terminal-Bench no result Agents evidence APEX-Agents 28% Novel problems evidence ARC-AGI-2 72% Long tasks no evidence yet METR time horizon no result Independent results from the Epoch AI benchmarking hub, best reasoning setting. The core tests are shown here; anchor tests also inform the score and can be shown above. ## What others say · rank on each leaderboard The Model Index independent tests, our method #32 of 219 · 165 LMArena · Creative writing creative writing #16 of 386 · 1469 LMArena · Maths maths questions in chat #18 of 373 · 1496 LMArena · Text overall chat quality, judged by people #26 of 388 · 1477 LMArena · Vision understanding images #19 of 149 · 1285 Epoch Capabilities Index overall capability from many benchmarks #32 of 239 · 154.5 LMArena · Coding coding questions in chat #57 of 383 · 1507 LMArena · WebDev building web apps and front ends #51 of 123 · 1499 LMArena · Documents working with long documents #19 of 41 · 1463 LiveBench · Overall overall, with fresh questions to limit contamination #33 of 58 · 74.6 Further left is better. Leaderboards measure different things: LMArena is people voting blind between two answers, the others are test scores. Click any row for the source. ## Best at · top three among current models 1st SWE-bench Verified Epoch AI · independent Where this model places in the top three of today's models, on category leaderboards and on our core tests. ## Where to use it · prices checked 1 Oct 2026 #### From the lab Gemini app · subscription ↗ Google AI Studio API ↗ #### API providers · 2 · per million tokens, in / out G Google $2.7 / $16.2 cheapest G Google AI Studio $2.7 / $16.2 ↗ Provider prices come from OpenRouter's live listing; going direct to a provider can differ. Subscriptions are the lab's own apps. ## Facts and sources Released 19 May 2026 Announcement [blog.google ↗](https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-5/?_bhlid=25af37ed31cbc0806de888e382fe92e66a1318da&trk=article-ssr-frontend-pulse_little-text-block) Release entry Gemini 3.5 Flash (3.5 Pro announced; unreleased) Scored as Gemini 3.5 Flash Artificial Analysis index – Output speed – Hugging Face closed weights ## Google releases · around this one Gemini 3.1 Flash-Lite Closed 3 MAR 2026 index 141 Gemma 4 Open 2 APR 2026 index 138 Gemini 3.5 Flash Closed 19 MAY 2026 index 165 Gemini 3.5 Flash-Lite Closed 21 JUL 2026 index 142 Gemini 3.6 Flash Closed 21 JUL 2026 index 164 --- Source: https://themodelindex.org/models/gemini-3-5-flash/ · The Model Index · data as of 2026-10-01