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Gemini 2.5 Flash Preview (09-2025)

Google DeepMind · 2025-09-25

Gemini 2.5 Flash Preview (09-2025) is Google's September 25, 2025 preview update to Gemini 2.5 Flash, released under the model code `gemini-2.5-flash-preview-09-2025`. Google described improved agentic tool use and greater thinking efficiency, and documented text, image, video, and audio inputs, text output, a 1,048,576-token input limit, and configurable thinking.

Benchmark scores

BenchmarkScore
AA-LCR64.3
AA-Omniscience Index-34.7
AIME 2024 (avg@8)54.6
AIME 2024-202551.5
AIME 202556.7
AIME 2025 (avg@8)48.3
Arena Text — Business, Management & Financial Ops (No Style Control)1398
Arena Text — Chinese (No Style Control)1451
Arena Text — Creative Writing (No Style Control)1388
Arena Text — English (No Style Control)1411
Arena Text — Entertainment, Sports & Media (No Style Control)1386
Arena Text — Exclude Ties (No Style Control)1389
Arena Text — Exclude Ties (Style Controlled)1386
Arena Text — Expert (No Style Control)1425
Arena Text — French (No Style Control)1437
Arena Text — French (Style Controlled)1439
Arena Text — German (No Style Control)1424
Arena Text — Hard Prompts (No Style Control)1409
Arena Text — Hard Prompts English (No Style Control)1409
Arena Text — Instruction Following (No Style Control)1395
Arena Text — Japanese (No Style Control)1407
Arena Text — Korean (No Style Control)1392
Arena Text — Legal & Government (No Style Control)1429
Arena Text — Life, Physical & Social Science (No Style Control)1436
Arena Text — Longer Query (No Style Control)1406
Arena Text — Medicine & Healthcare (No Style Control)1425
Arena Text — Multi-turn (No Style Control)1396
Arena Text — Non-English (No Style Control)1399
Arena Text — Non-English (Style Controlled)1394
Arena Text — Occupational Mathematical (No Style Control)1421
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