Google · API-only (closed weights)

Gemini 2.5 Flash (Sep 2025)

Gemini 2.5 Flash (Sep 2025) is an API-only (closed weights) language model from Google, released September 25, 2025. On the Epoch Capabilities Index it scores 141.9, rank 111 of 256 rated models.

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Lab

Google

Released

September 25, 2025

Weights

API-only (closed weights)

Parameters

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Context

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Price / M tokens

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Epoch ECI

141.9 #111

Benchmark results

Benchmark (Epoch AI)	Score
The Agent Company	41.1%
Terminal-Bench	17.1%

Links

Epoch AI benchmarks

Models with a similar score

Gemini 3.5 Flash-Lite · Kimi K2 Thinking · o4-mini · Gemini 3.1 Flash-Lite · Gemini 2.5 Pro (Jun 2025) · Claude Opus 4.1 · DeepSeek-V3.2-Exp · Grok 4 Fast

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