It's pretty common to refer to models by the month and year they were released.

For example, the latest Gemini 2.5 Flash is known as "google/gemini-2.5-flash-preview-09-2025" [1].

[1]: https://openrouter.ai/google/gemini-2.5-flash-preview-09-202...

cpeterso 3 hours ago | parent | next [-]

If they're going to include the month and year as part of the version number, they should at least use big endian dates like gemini-2.5-flash-preview-2025-09 instead of 09-2025.

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relatedtitle 3 hours ago | parent | prev | next [-]

I'm pretty sure Google just does that for preview models and they drop the date from the name when it's released.

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herpderperator 4 hours ago | parent | prev [-]

Or, you know, just Gemini 2.6 Flash. I don't recall the 2.5 version having a date associated with it when it came out, though maybe they are using dates now. In marketing, at least, it's always known as Gemini 2.5 Flash/Pro.

	▲	vitorgrs an hour ago \| parent \| next [-]
		It always had dates... They release multiple versions and update regularly. Not sure if this is the first 2.5 Flash update, but pretty sure Pro had a few updates as well... This is also the case with OpenAI and their models. Pretty standard I guess. They don't change the versioning, because I guess they don't consider it to be "a new model trained from scratch".
	▲	kingo55 4 hours ago \| parent \| prev [-]
		It had a date, but I also agree this is extremely confusing. Even semver 2.5.1 would be clearer IMO.