Cheapest frontier model API

Frontier = Artificial Analysis Intelligence Index ≥ 55 (verified 2026-09-05). source. · 10 models

#ModelInput /1MOutput /1MBlended /1MReleasedVerified
1GLM 5.3 Flash (Relace) · Relace$0.0713$0.2375$0.3092026-08-261d ago
2Gemini 3.8 Flash (Google) · Google$0.75$3.75$4.52026-09-022d ago
3GLM 5.3 (Reka) · Reka$1.15$3.5$4.652026-08-14today
4GPT-5.6 Sol (OpenAI) · OpenAI$1$5$62026-07-09today
5GPT-5.6 Terra (OpenAI) · OpenAI$1$6$72026-07-09today
6Grok 4.6 (xAI) · xAI$2$6$82026-08-122d ago
7Claude Sonnet 5 (Anthropic) · Anthropic$2$10$122026-06-30today
8Kimi K3 (DeepInfra) · DeepInfra$2.85$14.25$17.12026-07-16today
9Claude Opus 5 (Anthropic) · Anthropic$5$25$302026-07-24today
10Claude Fable 5 (Anthropic) · Anthropic$10$50$602026-06-09today

Blended = input + output price per 1M tokens. One cheapest offer shown per model, models released within the last 12 months. "Verified" = when each price was last checked against its source. Click a column header to sort.