Mistral Medium 3.5 alternatives
Match · Updated July 2026
The closest alternative to Mistral Medium 3.5 is Step 3.7 Flash — comparable intelligence (30.3 vs 29.9); for a cheaper option, GPT-5.6 Terra runs $1.25/M vs $1.50/M; and the best open-weight substitute is Kimi K3.
Closest match
Cheaper alternatives
gpt-5.6-terra
$1.25/M input · 55.0 intel
claude-sonnet-5:batch
$1.00/M input · 53.4 intel
gpt-5.4:batch
$1.25/M input · 51.4 intel
gpt-5.6-luna
$0.500/M input · 51.2 intel
glm-5.2
$0.966/M input · 51.1 intel
muse-spark-1.1
$1.25/M input · 50.6 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 Mistral Medium 3.5?
Step 3.7 Flash is the closest alternative to Mistral Medium 3.5, with an Intelligence Index of 30.3 (Mistral Medium 3.5 scores 29.9) at $0.200 per million input tokens.
Is there a cheaper alternative to Mistral Medium 3.5?
Yes — GPT-5.6 Terra costs $1.25 per million input tokens versus $1.50 for Mistral Medium 3.5, while staying within ~8 points of its Intelligence Index.
Is there an open-source alternative to Mistral Medium 3.5?
Kimi K3 is the strongest open-weight alternative to Mistral Medium 3.5 — downloadable from Hugging Face and self-hostable, scoring 57.1 on intelligence.