AI Foundation Models: API Pricing & Token Cost Comparison
Updated daily • Prices per 1M tokens
Compare input, output, and caching token costs for the leading AI foundation models (OpenAI, Anthropic, Google). Whether you are looking for the cheapest API for AI coding, evaluating text-to-image API pricing, or analyzing LLM prompt caching pricing strategies, our real-time AI API cost comparison helps you find the most cost-effective models for your specific developer needs.
#
Model
Modality
Unit
Input
Cached Input
Output / cost
Note
Updated
Docs
gpt-5.5
OpenAIText
1M tokensDocs ↗
Input$5.00
Output$30.00
Cached Input$0.50
Updated2026-05-14
gpt-5.5-pro
OpenAIText
1M tokensDocs ↗
Input$30.00
Output$180.00
Cached Input-
Updated2026-05-14
gpt-image-2
OpenAIImage
1M tokensDocs ↗
Input$8.00
Output$30.00
Cached Input$2.00
Updated2026-05-14
gpt-image-2
OpenAIText
1M tokensDocs ↗
Input$5.00
Output-
Cached Input$1.25
Updated2026-05-14
gpt-realtime-2
OpenAIAudio
1M tokensDocs ↗
Input$32.00
Output$64.00
Cached Input$0.40
Updated2026-05-14
gpt-realtime-2
OpenAIText
1M tokensDocs ↗
Input$4.00
Output$24.00
Cached Input$0.40
Updated2026-05-14
gpt-realtime-2
OpenAIImage
1M tokensDocs ↗
Input$5.00
Output-
Cached Input$0.50
Updated2026-05-14
gpt-realtime-translate
OpenAIAudio
1M tokensDocs ↗
Input-
Output-
Cached Input-
Updated2026-05-14
Note:$0.034 / minute