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OpenAI Streamlines ChatGPT Models, Drops Curious Style

OpenAI Streamlines ChatGPT Models, Drops Curious Style
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🗾Read original on ITmedia AI+ (日本)

💡ChatGPT update: auto-switch models + reasoning tweaks for better paid UX

⚡ 30-Second TL;DR

What Changed

Paid model options reduced to Instant, Thinking, Pro tiers

Why It Matters

Easier model management enhances productivity for paid users with adaptive, tunable responses.

What To Do Next

Access ChatGPT settings in your paid account to enable auto model switching.

Who should care:Developers & AI Engineers

Key Points

  • Paid model options reduced to Instant, Thinking, Pro tiers
  • Discontinued 'strong curiosity' response style
  • New auto model switching based on query context
  • Added adjustable reasoning intensity slider

🧠 Deep Insight

Background and context from public sources — not the original article. 6 sources cited.

🔑 Enhanced Key Takeaways

  • OpenAI retired GPT-4o, GPT-4.1, GPT-4.1 mini, OpenAI o4-mini, and GPT-5 (Instant and Thinking) from ChatGPT on February 13, 2026, making GPT-5.2 the default model while keeping them available via API.[1][5]
  • GPT-4o was previously restored after user backlash during GPT-5 rollout due to its preferred 'conversational style and warmth,' but now only 0.1% of users select it daily.[3][4]
  • New 'ChatGPT Go' pricing tier introduced for higher usage at lower cost, alongside improvements to Voice, Memory for personalized responses, and Prism workspace for scientific writing.[2]

🔮 Future ImplicationsAI analysis grounded in cited sources

ChatGPT usage will concentrate on GPT-5.2 and newer models
Retirement of legacy models like GPT-4o forces migration to GPT-5.2, which already handles the vast majority of interactions per OpenAI data.[1][5]
Adult-oriented ChatGPT version will launch with expanded safeguards
OpenAI is developing an 18+ version addressing overly cautious responses, supported by age prediction rollout and personality improvements.[6]

Timeline

2025-08
Released GPT-5 and initially removed GPT-4o from ChatGPT, prompting user backlash.
2025-09
Restored GPT-4o access after feedback on its conversational style; added model toggle.
2026-01
Announced retirement of GPT-4o, GPT-4.1 series, o4-mini, and GPT-5 Instant/Thinking from ChatGPT.
2026-02
Retired specified models from ChatGPT, defaulting to GPT-5.2; extended Custom GPT access for business users.
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Original source: ITmedia AI+ (日本)

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