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o3 API pricing

As of October 16, 2026, o3 costs $2.00 per million input tokens and $8.00 per million output tokens on the OpenAI API. Cached input is $0.50 per million. OpenAI plans to retire it on December 11, 2026.

Retires Dec 11

It is the 18th cheapest of 36 OpenAI models tracked here, by blended price. The closest Standard-tier model from another provider is Gemini 2.5 Pro (Google) at $1.25 / $10.00; o3 is 2% more expensive. Same list price as GPT-4.1. First listed in the LiteLLM price data on April 16, 2025. Its price has been cut 1 time and raised 0 times since.

Input / 1M tokens$2.00
Output / 1M tokens$8.00
Context window200K
Max output100K

Every published rate

RatePer 1M tokens
Input (standard)$2.00
Output (standard)$8.00
Cached input (read)$0.50
Batch input$1.00
Batch output$4.00

What it costs in practice

TaskTokensPer requestPer 1,000 requests
Chatbot reply1,000 in / 500 out$0.006$6.00
Summarize a long document20,000 in / 1,000 out$0.05$48.00
Coding agent step50,000 in / 2,000 out$0.12$116

Standard rates, no caching or batch discount. Compare your own numbers across all models →

Price history

$40.00 $0 2025-04-162026-10-16
Per 1M tokens. ━ Output · ┅ Input
DateModelChange
2025-06-10o3Output price: $40.00 → $8.00 (-80%) source
2025-06-10o3Input price: $10.00 → $2.00 (-80%) source
2025-04-16o3New model listed: $10 in / $40 out source

Dates are when each change first appeared in the LiteLLM price data, usually within days of the provider's announcement.

Details

ProviderOpenAI
Price tierStandard
FeaturesVision, Reasoning, Prompt caching, Tool use, PDF input, Web search
API model nameso3, o3-2025-04-16
Retirement dateDecember 11, 2026
Official pricingdevelopers.openai.com

Models at a similar price

ModelInput / 1MOutput / 1M
Gemini 3.5 Flash$1.50$9.00
Gemini 2.5 Pro$1.25$10.00
GPT-5$1.25$10.00
GPT-5.1$1.25$10.00
GPT-5 Search API$1.25$10.00
GPT-4.1$2.00$8.00

Other OpenAI models

ModelInput / 1MOutput / 1M
GPT-4$30.00$60.00
GPT-5.6 Cyber$12.50$75.00
GPT-5.5 Cyber$12.50$75.00
o1$15.00$60.00
GPT-6 Astra$10.00$50.00
GPT-4 Preview$10.00$30.00
GPT-4 Turbo$10.00$30.00
GPT-5.5$5.00$30.00
GPT-Rosalind Research$5.00$25.00
GPT-Rosalind Discovery$5.00$25.00
GPT-5.6$4.00$20.00
GPT-5.6 Sol$4.00$20.00
GPT-5.4$2.50$15.00
GPT-5.2$1.75$14.00
GPT-5.6 Terra$2.00$12.00
GPT-4o$2.50$10.00
GPT-6 Sol$2.00$10.00
GPT-6.1 Sol$2.00$10.00
GPT-4.1$2.00$8.00
GPT-5$1.25$10.00
GPT-5.1$1.25$10.00
GPT-5 Search API$1.25$10.00
GPT-3.5 Turbo 16K$3.00$4.00
o3 Mini$1.10$4.40
o4 Mini$1.10$4.40
GPT-5.4 Mini$0.75$4.50
GPT-3.5 Turbo$0.50$1.50
GPT-4.1 Mini$0.40$1.60
GPT-5 Mini$0.25$2.00
GPT-5.4 Nano$0.20$1.25
GPT-5.6 Luna$0.20$1.20
GPT-4o Mini$0.15$0.60
GPT-6 Luna$0.10$0.50
GPT-4.1 Nano$0.10$0.40
GPT-5 Nano$0.05$0.40