ChatGPT, then and now
https://www.emergentmind.com/chatgpt-then-and-now

492 prompts that people shared on LearnGPT (the site that became Emergent Mind)
between December 2022 and March 2023, with the answer ChatGPT gave then and the
answer GPT-6 Astra gave to the same prompt in October 2026.

How it was made
- Original answers are as the people who shared them pasted them, so they may
  contain transcription typos. Answers shared before March 14, 2023 are labeled
  GPT-3.5; four from GPT-4's launch week say GPT-4; two shared later say ChatGPT
  because the model can't be known.
- Each prompt went to GPT-6 Astra (openai/gpt-6-astra on OpenRouter) exactly as it
  was shared: one user message, no system prompt, default reasoning effort.
- Claude Opus 5.5 wrote the analysis column after reading both answers.
- Only single-turn examples whose original answer survives as text are included,
  and a few were left out for missing context or inappropriate content.

Columns (chatgpt-then-and-now.csv)
post_id                  ID of the original post
url                      The pair's page on Emergent Mind
prompt                   The prompt as shared
shared_at                When it was shared (UTC)
upvotes                  Upvotes it got on LearnGPT
source_url               Where it was first posted, when the sharer credited a link
original_model           GPT-3.5, GPT-4 or ChatGPT (see above)
original_response        The original answer
original_words           Word count of the original answer
astra_model              The model OpenRouter served
astra_response           GPT-6 Astra's answer (Markdown)
astra_words              Word count of Astra's answer
astra_reasoning_summary  Astra's own summary of its reasoning, when it gave one
astra_prompt_tokens      Input tokens for Astra's answer
astra_completion_tokens  Output tokens, including reasoning
astra_reasoning_tokens   Reasoning tokens, when reported
astra_generated_at       When Astra answered (UTC)
analysis_model           The model that wrote the analysis
analysis                 Claude Opus 5.5's comparison of the two answers (Markdown)

Generated 2026-10-19.
