Gemini 1.5 Flash (Sep ’24)
Analysis Summary
Gemini 1.5 Flash in its September 2024 update was a capable lightweight model for its time, with an intelligence index of 8 and a livecodebench score of 0.273. These figures placed it in the mid-tier of the 2024 landscape, but the model has since been superseded by Gemini 2.0 Flash and the current 3.x Flash generation.
For businesses, this version is no longer the recommended choice even within the Flash family. Its GPQA of 0.463 and MMLU-Pro of 0.680 show reasonable general knowledge, but reasoning depth and coding reliability fall short of what current models offer at comparable or lower price points. No pricing data is available for this version.
Teams should migrate to a current Flash release. This entry is useful for benchmarking historical performance but should not be the basis for new deployments.
Assessed July 10, 2026
Editorial notes
Gemini 1.5 Flash (Sep 2024) is a mid-2024 Google model with moderate reasoning and coding scores; it has been superseded by newer Flash generations and is best treated as a legacy reference point.
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DFO Verdict
Gemini 1.5 Flash (Sep 2024) is a mid-2024 Google model with moderate reasoning and coding scores; it has been superseded by newer Flash generations and is best treated as a legacy reference point.
How Gemini 1.5 Flash (Sep ’24) compares
Gemini 1.5 Flash (Sep ’24) ranks #274 of 393 AI models we track for overall intelligence. Gemini 1.5 Flash (Sep ’24) is currently free to use via OpenRouter.
Dark bar = input Ā· light bar = output, scaled to the priciest peer.
1M tokens ā 8 full-length novels or ~2,500 pages of business documents in a single request.
Strongest on intelligence. The pulled-in value corner is the trade-off, and if the shape matters more than the price, this is your model.
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Frequently asked questions about Gemini 1.5 Flash (Sep ’24)
How much does Gemini 1.5 Flash (Sep ’24) cost?
Gemini 1.5 Flash (Sep ’24) is currently available for free via OpenRouter.
Who created Gemini 1.5 Flash (Sep ’24)?
Gemini 1.5 Flash (Sep ’24) is developed by Google and was released on September 24, 2024.
