Top Free Reasoning AI Models
The best free reasoning AI models right now, ranked and compared on price, context window and features. 11 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 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 - LFM2.5-2.6B
Liquid · 128K context · Free · Reasoning · Tools
$0.350 in
$0.500 out - Laguna S 2.1
Poolside · 1.05M context · Free · Reasoning · Tools
$0.090 in
$0.180 out - Laguna XS 2.1
Poolside · 262K context · Free · Reasoning · Tools
$0.060 in
$0.120 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.