The Model Index
Models/Google

Gemini 2.5 Flash (Sep 2025)

GoogleReleased 25 Sep 2025Closed
138126–150Index score#94 · provisional, limited data
1/ 8Core tests taken1 of 6 areas · plus 3 anchor tests
−16Versus the frontier at releasebest then: GPT-5Replaced by Gemini 3 Flash
–Price per million tokensno public API price found
–Context windowtokens it reads at once

Where it sitson the frontier

Gemini 2.5 Pro reached this score 6 months earlier.

Test resultsby area · tick = best by any model

Reasoning & knowledgeno evidence yet
GPQA Diamond
no result
Humanity's Last Exam
no result
Mathsno evidence yet
FrontierMath T1-3
no result
Codingevidence
SWE-bench Verified
no result
Terminal-Bench
17%
Agentsevidence
APEX-Agents
no result
Novel problemsno evidence yet
ARC-AGI-2
no result
Long tasksno 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 sayrank on each leaderboard

The Model Indexindependent tests, our method#94of 219 · 138

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 attop three among current models

Replaced by Gemini 3 Flash; it no longer leads any category among current models.

Where this model places in the top three of today's models, on category leaderboards and on our core tests.

Where to use itprices checked 1 Oct 2026

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

Released25 Sep 2025
Announcementnot linked yet
Release entry–
Scored asGemini 2.5 Flash (Sep 2025)
Artificial Analysis index–
Output speed–
Hugging Faceclosed weights

Google releasesaround this one