What is OpenAI API pricing?
OpenAI API pricing is the cost of using OpenAI models through API calls, usually charged by input tokens, output tokens, and sometimes special model-specific units.
AI API pricing comparison
OpenAI API Pricing Comparison 2026
Compare OpenAI API token pricing across official and marketplace routes. Review input cost, output cost, source type, verification status, and cheaper alternatives before choosing a provider.
Need a provider shortlist? Submit your model, usage volume, region, and budget. Inferras helps organize provider options before you contact vendors.
Helpful comparisons:GPT API pricing comparison
TLDR
Compare OpenAI API token pricing across official and marketplace routes. Review input cost, output cost, source type, verification status, and cheaper alternatives before choosing a provider.
Best for
Teams comparing public pricing before choosing a model API, marketplace route, or provider shortlist.
Looking for provider options beyond official APIs?
Compare AI API reseller options, pricing models and risk factors on Inferras before choosing which providers to contact.
OpenAI API pricing approved price listings
Public comparison pages only show approved price listings with source links, verification status, and last checked dates.
| Model | Provider | Provider category | Region | Input / 1M | Output / 1M | Source | Verification | Checked | Updated | View |
|---|---|---|---|---|---|---|---|---|---|---|
OpenAI: GPT-4o-mini | OpenRouterOfficial source | Official model owner | Global | $0.15 | $0.60 | marketplaceSource | Source listed | May 10, 2026 | May 10, 2026 | View |
GPT-5.4 mini | OpenAIOfficial source | Official model owner | Global | $0.75 | $4.50 | officialSource | Source listed | May 10, 2026 | May 10, 2026 | View |
OpenAI: GPT-4o | OpenRouterOfficial source | Official model owner | Global | $2.50 | $10.00 | marketplaceSource | Source listed | May 10, 2026 | May 10, 2026 | View |
GPT-5.4 | OpenAIOfficial source | Official model owner | Global | $2.50 | $15.00 | officialSource | Source listed | May 10, 2026 | May 10, 2026 | View |
GPT-Realtime-2 text | OpenAIOfficial source | Official model owner | Global | $4.00 | $24.00 | officialSource | Source listed | May 10, 2026 | May 10, 2026 | View |
GPT-5.5 | OpenAIOfficial source | Official model owner | Global | $5.00 | $30.00 | officialSource | Source listed | May 10, 2026 | May 10, 2026 | View |
Verification indicates how confidently the listed price matches its public source.
Prices are collected from public provider pages and may change over time. Verify pricing, billing units, rate limits, and terms directly on the source page before purchase.
Source note: Source links open public provider pages. Prices may change over time.
FAQ
OpenAI API pricing
How much does OpenAI API cost per 1M tokens?
The cost depends on the exact OpenAI model and billing unit. Use public source links and approved Inferras listings to compare input and output prices per 1M tokens.
Why are OpenAI input and output token prices different?
Input tokens are text the model reads, while output tokens are text the model generates. Output generation usually costs more compute, so output token prices are often higher.
What are cheaper alternatives to OpenAI API?
Developers often compare Claude, Gemini, DeepSeek, Together AI, OpenRouter-style marketplaces, reseller routes, and self-hosted inference depending on workload and risk tolerance.
Is OpenAI API pricing the same as GPT API pricing?
Not exactly. OpenAI API pricing focuses on official OpenAI and OpenAI-related marketplace listings, while GPT API pricing also covers broader GPT-family and GPT OSS routes.