o4 Mini: gPT-5 mini succeeded o4-mini as a newer small reasoning model

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.

OpenAI o4-mini is a small reasoning model supporting text and image inputs, text output, and tool-assisted workflows, with standard API pricing of $1.10 per million input tokens and $4.40 per million output tokens. GPT-5 mini is its documented successor; this profile remains specific to o4-mini.

What changed in this review:

• OpenAI reports GPQA Diamond at 81.4%; this is a vendor evaluation, distinct from third-party leaderboard results.
• Added published SWE-bench Verified and separate AIME 2024 and AIME 2025 results.
• Flaws and limitations 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://platform.openai.com/docs/guides/reasoning