AI API Cost & Token Budget Estimator (2026)

GPT 5.66OpenAI

$2.5/M in • $10/M out

$325.00/mo

$65.000 / 1k reqs

Claude Sonnet 5Anthropic

$3/M in • $15/M out

$307.50/mo

$61.500 / 1k reqs

Claude Opus 5Anthropic

$15/M in • $75/M out

$1177.50/mo

$235.500 / 1k reqs

Fable 5Fable AI

$1.8/M in • $7.2/M out

$205.20/mo

$41.040 / 1k reqs

Gemini 3.6 FlashGoogle

$0.075/M in • $0.3/M out

$6.75/mo

$1.350 / 1k reqs

Gemini 3.5 FlashGoogle

$0.05/M in • $0.2/M out

$4.50/mo

$0.900 / 1k reqs

Gemini 3.1 ProGoogle

$1.25/M in • $5/M out

$112.50/mo

$22.500 / 1k reqs

DeepSeek V4DeepSeek

$0.14/M in • $0.28/M out

$5.74/mo

$1.148 / 1k reqs

Kimi K3Moonshot AI

$0.6/M in • $2.4/M out

$58.80/mo

$11.760 / 1k reqs