Let's help OpenAI come up with a better naming scheme for their models

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From Da Vinci to GPT 3.5 to GPT 4 to GPT 4 Turbo to GPT 4o to GPT o1 to GPT o3 to GPT 4.5 to GPT 4.1

Task: Complete the pattern.
Alternative Task: Correct the pattern.

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Da Vinci → GPT 3.5 → GPT 4 → GPT 4 Turbo → GPT 4o → GPT o1 → GPT o3 → GPT 4.5 → GPT 4.1 → GPT o4 → GPT 5 Beta → GPT Alpha → GPT π → GPT Omega → GPT ∞

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A select few OpenAI models try their hand at completing the pattern.

GPT 4.5 => GPT-o5

Given the specific incremental odd-numbered “o” naming (o1 → o3), the next plausible model in the optimized series would logically be GPT-o5.

Most Logical Next Entry:

GPT-o5

o1 pro mode => ???

Either way, there’s no single “right” answer—the sequence you gave is more playful than strictly numeric. As long as you keep mixing version numbers, decimals, and affixes like “Turbo” or “o,” you’ll stay consistent with the whimsical pattern.

GPT 4.1 => GPT 4.2

Da Vinci → GPT-3.5 → GPT-4 → GPT-4 Turbo → GPT-4o → GPT-o1 → GPT-o3 → GPT-4.5 → GPT-4.1 → GPT-4.2

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GPT-4.200000000000000000000003e

I did kinda like the “named” versions better, but they’re iterating fast.

Started hearing about Google’s Dragontail today…

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Aren’t the o# series reasoning and # and #o not… I thought these were grouped like this though 4o had some reasoning?

:brain: OpenAI Model Progression

GPT Series:

  • GPT-3.5: An enhancement over GPT-3, offering improved performance in language tasks.
  • GPT-4: Introduced multimodal capabilities, allowing it to process both text and images.
  • GPT-4 Turbo: An optimized version of GPT-4, providing faster responses and reduced costs.
  • GPT-4o (“Omni”): Launched in May 2024, this flagship model integrates real-time reasoning across text, audio, and vision, enabling more natural and intuitive interactions.
  • GPT-4.5 (“Orion”): A transitional model released as a research preview in February 2025, offering incremental improvements over GPT-4o.
  • GPT-4.1: The latest iteration, boasting a significantly larger context window (up to one million tokens), enhanced coding capabilities, and improved efficiency.

o-Series (Reasoning Models):

  • o1: Designed for complex reasoning tasks, such as research, strategy, coding, math, and science.
  • o3-mini: A smaller, faster variant of the o-series, optimized for intelligent reasoning tasks.
  • o3 and o4 (Upcoming): OpenAI plans to debut these reasoning models shortly, aiming to further enhance complex problem-solving capabilities.

Edit: I think 4o was ‘multi-modal reasoning’ hence the o

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I just had a similar idea. The problem is that GPT-5 is expected to be some kind of magical AGI model, and since the expectations are so high, we won’t get there anytime soon.

Now, since the number can’t go up and there are also lower bounds already in place, the solution is to read between the lines.

→ GPT 4.o5

For example.

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Yeah, I always took the 0# as reasoning then output and #o as the old completion.

Wait, not 4.05 (zero five?) lol

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I kinda like the actual names, but perhaps they could add aliases to make them have a sort of “persona”.

Like this:

  • similar to how we have aliases like gpt-4.1 and gpt-4.1-mini that points to another model, an hypothetical alias gpt-4.1-leonardo would in fact point to the latest gpt-4.1-2025-04-14
  • and gpt-4.1-melzi would point to gpt-4.1-mini-2025-04-14

Wouldn’t change anything to the current trends but we could associate each model generation by their names, making easier to refer to them, similar to how companies name their OS versions and project codenames.

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I would like to know how 4.5 made it out before 4.1 :slight_smile:

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Still some way to 42 at that rate…

Might be a time dilation due to the super-massive black hole?

Or, maybe a giant leap too far… Seems more likely with the retirement and GPU repurposing…

Look before you leap kinda thing :smiley:

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This thread is making their naming scheme seem worse than it really is, since the reasoning “o” series is explicitly not part of the GPT series, though @phyde1001 seems to be the only one who has picked up on that so far.

I actually thought the new 4.1 naming was spot on, and during their livestream they mentioned how intentional that name was. It makes sense given the relative capabilities compared to 4o.

I think 4.5 is an effective “regression” in a lot of ways (relative to 4o) and isn’t as capable in many respects, for example lacking truly multimodal outputs.

People expect versioning progression to reflect capability increases, so 4.5 is a misnomer in that sense. And while it’s not called GPT-4o.5, most people won’t catch that distinction.