Top Free No-Training Reasoning AI Models
The best free no-training reasoning AI models right now, ranked and compared on price, context window and features. 8 models match. These are models you can use at no cost, either through a free tier or because they are priced at zero, and models whose providers do not train on your prompts, and models that think step by step before answering.
- Nemotron 3.5 Super VL
NVIDIA · 1.05M context · Free · ZDR · Images · Reasoning · Tools
$0.150 in
$0.500 out - Inkling Small
Thinkingmachines · 524K context · Free · ZDR · Images · Reasoning · Tools
$0.450 in
$1.20 out - Inkling
Thinkingmachines · 524K context · Free · ZDR · Images · Reasoning · Tools
$1.00 in
$4.05 out - Nemotron 3 Ultra
NVIDIA · 262K context · Free · ZDR · Reasoning · Tools
$0.600 in
$2.40 out - Gemma 4 26B A4B
Google · 262K context · Free · ZDR · Images · Reasoning · Tools
$0.076 in
$0.255 out - Gemma 4 31B
Google · 262K context · Free · ZDR · Images · Reasoning · Tools
$0.200 in
$0.400 out - Nemotron 3.5 Lightning
NVIDIA · 262K context · Free · ZDR · Reasoning · Tools
$0.070 in
$0.200 out - Nemotron 3.5 Content Safety
NVIDIA · 131K context · Free · ZDR · Images · Reasoning
$0.200 in
$0.200 out
Prices are per 1M tokens. Ranked by intelligence score where available, then newest.