AI agents · OpenClaw · self-hosting · automation

Quick Answer

Best Cheap AI API 2026: Price Per Task Ranked

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The Short Answer

In 2026 the cheapest capable AI API is DeepSeek V4 Flash ($0.14/$0.28 off-peak) — roughly $0.017 per standard task. Among closed models, GPT-5.6 Luna ($1/$6) and Gemini 3.6 Flash ($1.50/$7.50) are the value leaders. Here’s the full ranking by real cost per task.

Ranked by Cost Per Task

(Reference task = 30K input + 5K output tokens.)

ModelPrice ($/MTok)Cost/taskContextEU?
DeepSeek V4 Flash$0.14 / $0.28~$0.0171MYes
GPT-5.6 Luna$1 / $6~$0.06largeYes
Gemini 3.6 Flash$1.50 / $7.50~$0.0831MYes
Grok 4.5$2 / $6~$0.09500KNo
Gemini 3.5 Flash-Lite$0.30 / $2.50~$0.022largeYes

(DeepSeek prices are off-peak; ~2x during peak UTC hours.)

The Picks

  • Absolute cheapest frontier-class → DeepSeek V4 Flash ($0.017/task). Cache-hit input drops to $0.0028, making repeated-context agents nearly free. Open-weight, so self-hostable.
  • Cheapest EU-safe closed model → GPT-5.6 Luna ($1/$6). Strong general capability at ~$0.06/task.
  • Best cheap coding agent → Gemini 3.6 Flash — Google’s July 21 default, uses up to 65% fewer output tokens, 1M context.
  • Cheapest with real-time strengths → Grok 4.5 ($2/$6), ~2x token efficiency — but US/non-EU only.
  • Ultra-cheap simple tasks → Gemini 3.5 Flash-Lite ($0.30/$2.50) for classification, extraction, routing.

Don’t Confuse Cheap With Capable

These are workhorses, not frontier reasoners. For hard coding or long-horizon reasoning, route up to Claude Opus 5 or GPT-5.6 Sol. The winning 2026 pattern: a cheap default (from this list) for the ~80% of easy, verifiable steps, escalating to a flagship only when confidence is low.

EU Watch-Out

Grok 4.5 is not available in the EU (AI Act). If you’re building for European users, keep your cheap tier on GPT-5.6 Luna, Gemini 3.6 Flash, or self-hosted DeepSeek/GLM.

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