o3 Mini High alternatives
Match · Updated July 2026
The closest alternative to o3 Mini High is Nemotron 3 Nano Omni (free) — comparable intelligence (14.9 vs 15.6); for a cheaper option, Claude Sonnet 5 (batch) runs $1.00/M vs $1.10/M; and the best open-weight substitute is Kimi K3.
Closest match
Cheaper alternatives
claude-sonnet-5:batch
$1.00/M input · 53.4 intel
gpt-5.6-luna
$0.500/M input · 51.2 intel
glm-5.2
$0.694/M input · 51.1 intel
gemini-3.5-flash:batch
$0.750/M input · 50.2 intel
gemini-3.6-flash:batch
$0.750/M input · 50.1 intel
gemini-3.1-pro-preview:batch
$1.00/M input · 46.5 intel
Smarter alternatives
Open-source alternatives
kimi-k3
57.1 intel · open weights · 1.0M ctx
glm-5.2
51.1 intel · open weights · 1.0M ctx
minimax-m3
44.4 intel · open weights · 1.0M ctx
minimax-m3:batch
44.4 intel · open weights · 524K ctx
deepseek-v4-pro
44.3 intel · open weights · 1.0M ctx
kimi-k2.6
44.2 intel · open weights · 262K ctx
Frequently asked
What is the best alternative to o3 Mini High?
Nemotron 3 Nano Omni (free) is the closest alternative to o3 Mini High, with an Intelligence Index of 14.9 (o3 Mini High scores 15.6) at Free per million input tokens.
Is there a cheaper alternative to o3 Mini High?
Yes — Claude Sonnet 5 (batch) costs $1.00 per million input tokens versus $1.10 for o3 Mini High, while staying within ~8 points of its Intelligence Index.
Is there an open-source alternative to o3 Mini High?
Kimi K3 is the strongest open-weight alternative to o3 Mini High — downloadable from Hugging Face and self-hostable, scoring 57.1 on intelligence.