o4 Mini: gPT-5 mini succeeded o4-mini as a newer small reasoning model; this profile remains specific to o4-mini

The OnAirToday AI Progress Tracker recorded a verified change to OpenAI's o4 Mini (version o4-mini): GPT-5 mini succeeded o4-mini as a newer small reasoning model; this profile remains specific to o4-mini.

OpenAI o4-mini is a compact reasoning model supporting text and image inputs, with strengths in mathematics, coding and visual problem-solving. Subsequently succeeded by GPT-5 mini, it has documented standard API pricing of $1.10 per million input tokens and $4.40 per million output tokens.

What changed in this review:

• GPQA Diamond is reported at OpenAI’s published 81.4%, with SWE-bench Verified, AIME and MMMU results added.
• Benchmark coverage is limited to directly documented results for the named model and evaluation.
• Added documented modality limitations, hallucination concerns and tool-use safeguards.
• Flaws and limitations updated
• Risks and threats updated

Teams building on o4 Mini should confirm limits, pricing and benchmark coverage against the vendor's own documentation before relying on these figures.

The full profile — capabilities, benchmark citations, known flaws and risk guidance — is on the tracker at /ai-models/o4-mini.

References:

• https://platform.openai.com/docs/models/o4-mini
• https://openai.com/index/introducing-o3-and-o4-mini/
• https://openai.com/index/o3-o4-mini-system-card/
• https://openai.com/index/introducing-gpt-5-for-developers/