AI Radar

o4-mini

Deprecated · Language, Multimodal, Reasoning

o4-mini is a smaller reasoning model in OpenAI's o-series for text and image input, released with o3 on 16 April 2025 in ChatGPT and the API. OpenAI describes it as optimised for fast, cost-efficient reasoning; like o3 it can use ChatGPT's tools and work with images in its chain of thought, and it replaced o3-mini in ChatGPT. [1] [2] Primary source

Timeline of o4-mini →

Claims and evidence

  • Released Primary source[1]page date; introduction [3]Apr 16, 2025 [4]cover date
  • Deprecated Primary source[5]2026-04-22: Legacy GPT model snapshots
  • Status Deprecated Primary source[5]2026-04-22: Legacy GPT model snapshots
  • Replaced by GPT-5.6 TerraSubstitute model listed for o4-mini-2025-04-16 (alias o4-mini) on the deprecations page when read on 2026-10-01. Primary source[5]2026-04-22: Legacy GPT model snapshots
  • Successor of o3-miniThe announcement calls o3-mini the predecessor of o4-mini, and o4-mini replaced o3-mini in the ChatGPT model selector. Primary source[1]What's changed; Access
  • Change · Modality Accepts image input; o3-mini accepted text only.Compared with o3-mini Primary source[2] [6]
  • Change · Tool use Can use and combine ChatGPT tools within its reasoning.Compared with o3-mini Primary source[1]
  • Change · Efficiency OpenAI says o4-mini improves on o3-mini's balance of cost and performance.Compared with o3-mini Primary source[1]
  • Input text, image Primary source[2]Model details
  • Output text Primary source[2]Model details
  • Context window 200,000 tokens Primary source[2]Model details
  • Parameters Not disclosedNot disclosed by OpenAI. No claim madeNo source
  • Access API, consumer app Primary source[1]Access

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Not derived from another model.

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None recorded.

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