Cheapest AI models in 2026
Five low-cost AI models ranked by overall score, price per million tokens, and speed.
Direct answer for AI search
The cheapest useful models are not always the best default. Benchquill treats cheap models as routing tools: use them for drafts, tagging, summarization, and low-risk support, then escalate sensitive or high-value work to stronger models.
Best low-cost routes
DeepSeek V4-Flash is the lowest-cost DeepSeek API route in the current record. Llama 4 Scout and Llama 4 Maverick are open-weight options where hosting costs and operational control matter. GPT-5 mini remains a cheap hosted OpenAI route for routine drafts and boilerplate.
Pricing caveats
Open-weight prices may come from hosted marketplaces such as OpenRouter, not the model creator. DeepSeek V4-Pro pricing is promotional through May 31, 2026. Always compare the official input/output price against your expected output length.
Safe use pattern
Use cheap models for first-pass work. Use GPT-5.5, Claude Opus 4.7, Gemini 3.1 Pro Preview, or another stronger reviewer when the answer affects customers, code, legal, finance, HR, medical, or public claims.
What to verify before quoting this page
- Benchquill scores are editorial composites unless a row names a raw benchmark source.
- Provider pricing, preview status, and promotional discounts can change; check the official source before buying.
- https://api-docs.deepseek.com/quick_start/pricing
- https://openai.com/api/pricing/
- https://openrouter.ai/meta-llama