Cheapest models

Ranked by blended API price (75% input + 25% output, USD per 1M tokens). Free promotional listings excluded. Source: OpenRouter. Variants (reasoning effort, batch) are folded into one row.

#	Model	Capability	AA index	Reasoning	Math	Coding	Context	$/M	Weights	Released
1	ILing 3.0 Flash VLNEWinclusionAI (Ant Group)	—	24.6	—	—	—	262K	$0.031	Open	10 Sep 2026
2	NNex-N2.5-MiniNEWNex AGI	—	—	—	—	—	262K	$0.044	Open	8 Sep 2026
3	ISchematron V2 TurboNEWInference.net	—	—	—	—	—	128K	$0.060	Open	12 Sep 2026
4	ISchematron V2 SmallNEWInference.net	—	—	—	—	—	128K	$0.095	Open	12 Sep 2026
5	IGranite 4.2 8BNEWIBM	—	11.1	—	—	—	131K	$0.11	Open	31 Aug 2026
6	NNex-N2.5-ProNEWNex AGI	—	—	—	—	—	262K	$0.12	Open	8 Sep 2026
7	DDeepSeek V4.1 FlashNEWbatchDeepSeek · +1 variant	—	39.5	—	—	—	1.05M	$0.17	Open	10 Sep 2026
8	XMiMo-V2.6-FlashNEWXiaomi	—	37.9	—	—	—	1.05M	$0.17	Open	21 Sep 2026
9	PTernary Bonsai 2 27BNEWPrismML	—	—	—	—	—	262K	$0.18	Open	18 Sep 2026
10	XMiMo-V2.6-ProNEWXiaomi	—	46.3	—	—	—	1.05M	$0.54	Open	21 Sep 2026

• AClaude Sonnet 5.5
  Anthropic · 28 Sep 2026 · AA 56 · 1M · $4.00/M
• AQwen3.8 Max Prime
  Alibaba (Qwen) · 23 Sep 2026 · 1M · $6.00/M
• OGPT-6 Sol
  OpenAI · 22 Sep 2026 · AA 47.5 · 1.05M · $4.00/M
• OGPT-6 Luna
  OpenAI · 22 Sep 2026 · AA 37.3 · 1.05M · $0.20/M
• OGPT-6 Sol Pro
  OpenAI · 22 Sep 2026 · 1.05M · $4.00/M
• OGPT-6 Luna Pro
  OpenAI · 22 Sep 2026 · 1.05M · $0.20/M
• AClaude Opus 5.5
  Anthropic · 22 Sep 2026 · AA 57.6 · 1M · $8.00/M
• XGrok 4.7
  xAI · 21 Sep 2026 · AA 46.4 · 500K · $3.00/M

Not ranked until an independent evaluator (Epoch AI) publishes scores. We don't use vendor-reported benchmark claims for rankings.