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
151	ZGLM 5.1Z.ai (Zhipu AI)	149.9	26.1	89.9	93.3	—	205K	$2.15	Open	7 Apr 2026
152	MMistral Medium 3.5Mistral AI	141.4	14.2	—	—	—	262K	$3.00	Open	28 Apr 2026
153	MMixtral 8x22B InstructMistral AI	—	—	—	—	—	66K	$3.00	Open	17 Apr 2024
154	AQwen3.8 2.4T A95BAlibaba (Qwen)	—	39.9	—	—	—	1.05M	$3.00	Open	12 Aug 2026
155	AMagnum v4 72Banthracite-org	—	—	—	—	—	33K	$3.13	Open	22 Oct 2024
156	CCommand ACohere	—	13.1	—	—	—	256K	$4.38	Open	13 Mar 2025
157	MKimi K3batchMoonshot AI · +1 variant	—	43.6	—	—	—	1.05M	$4.56	Open	16 Jul 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.