Step 3.7 Flash alternatives
Match · Updated July 2026
The closest alternative to Step 3.7 Flash is o3 — comparable intelligence (30.4 vs 30.3); for a cheaper option, GPT-5.6 Luna runs $0.100/M vs $0.200/M; and the best open-weight substitute is Kimi K3.
Closest match
Cheaper alternatives
gpt-5.6-luna
$0.100/M input · 51.2 intel
minimax-m3:batch
$0.150/M input · 44.4 intel
hy3
$0.132/M input · 41.2 intel
deepseek-v4-flash
$0.140/M input · 40.3 intel
gpt-5.4-nano:batch
$0.100/M input · 38.2 intel
mimo-v2.5
$0.140/M input · 37.2 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 Step 3.7 Flash?
o3 is the closest alternative to Step 3.7 Flash, with an Intelligence Index of 30.4 (Step 3.7 Flash scores 30.3) at $2.00 per million input tokens.
Is there a cheaper alternative to Step 3.7 Flash?
Yes — GPT-5.6 Luna costs $0.100 per million input tokens versus $0.200 for Step 3.7 Flash, while staying within ~8 points of its Intelligence Index.
Is there an open-source alternative to Step 3.7 Flash?
Kimi K3 is the strongest open-weight alternative to Step 3.7 Flash — downloadable from Hugging Face and self-hostable, scoring 57.1 on intelligence.