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@kimmonismus posted on 2026-08-08 marking one year since GPT-5's release…

2026-08-08 · 11:06 UTC ·@kimmonismus ·0 min read

Brief

GPT-5's anniversary post by @kimmonismus (2026-08-08) says the model's initial 2025 rollout was marred by failed 'routing', underperformance and a 'chartcrime,' but OpenAI executed a 'complete turnaround' resulting in version 5.6 Sol, which the author claims surpasses Fable 5 and leaves OpenAI in a stronger position.

Why it matters

@kimmonismus posted on 2026-08-08 marking one year since GPT-5's release (≈2025-08-08) with a celebratory 'Happy Birthday, GPT-5.'

Key details

  • The author claims the initial GPT-5 rollout introduced 'routing' that 'didn't work as expected,' the model 'fell short of expectations,' and a 'chartcrime' was the final straw.
  • OpenAI achieved a 'complete turnaround,' releasing version 5.6 Sol (compared to Fable 5) that the author says put OpenAI 'in a better position' than before.
Source evidence

Happy Birthday, GPT-5. It's actually been a whole year since GPT-5 was released.

One of the low points since everything at OpenAI changed for the better.

Back then, routing was introduced, and it didn't work as expected at all.

The model itself also fell short of expectations, and the chartcrime was the final straw.

But OpenAI recognized the problems and made a complete turnaround, rising to the top with version 5.6 Sol (depending on how you compare it to Fable 5).

OpenAI has made history in how to find solutions to problems. And they're in a better position today than ever before.

In that spirit: Happy Birthday, GPT-5!