Gemini 2.5 Flash Preview (09-2025)

Name: Gemini 2.5 Flash Preview (09-2025)
Author: Google

Google · 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

Benchmark	Score
AA-LCR	64.3
AA-LCR v1.1	71.0
AA-Omniscience Index	-36.1
AIME 2024 (avg@8)	54.6
AIME 2024-2025	51.5
AIME 2025	75.6
AIME 2025 (Artificial Analysis avg@10)	78.3
AIME 2025 (avg@8)	48.3
Arena Text — Business, Management & Financial Ops (No Style Control)	1398
Arena Text — Chinese (No Style Control)	1449
Arena Text — Creative Writing (No Style Control)	1386
Arena Text — English (No Style Control)	1413
Arena Text — Entertainment, Sports & Media (No Style Control)	1386
Arena Text — Exclude Ties (No Style Control)	1389
Arena Text — Exclude Ties (Style Controlled)	1385
Arena Text — Expert (No Style Control)	1418
Arena Text — French (No Style Control)	1433
Arena Text — French (Style Controlled)	1436
Arena Text — German (No Style Control)	1418
Arena Text — Hard Prompts (No Style Control)	1409
Arena Text — Hard Prompts English (No Style Control)	1410
Arena Text — Instruction Following (No Style Control)	1394
Arena Text — Japanese (No Style Control)	1405
Arena Text — Korean (No Style Control)	1384
Arena Text — Legal & Government (No Style Control)	1427
Arena Text — Life, Physical & Social Science (No Style Control)	1434
Arena Text — Longer Query (No Style Control)	1405
Arena Text — Medicine & Healthcare (No Style Control)	1425
Arena Text — Multi-turn (No Style Control)	1396
Arena Text — Non-English (No Style Control)	1396