Anthropic's developer API for the Claude model family, billed per million tokens with separate input, output and prompt-caching rates.
Usage-based pricing
OpenAI API
OpenAI's developer API for calling its language models, billed per million tokens with separate input, cached-input and output rates.
Overview
The OpenAI API lets developers call OpenAI models from their own applications and is billed by token usage. Each model has separate rates for input and output tokens, plus a lower rate for cached input on most models.
The pricing page lists several model families; the rates recorded here are the Standard tier at short context (up to 272K tokens). Long-context requests are priced higher.
Pricing
Usage-based pricing
Usage-based rates
| Item | Rate | Details | Source and check date |
|---|---|---|---|
| gpt-6-astra, input | USD 10 per 1M input tokens | Cached input shown as $1.00 per 1M tokens. Standard tier, up to 272K context. | Source for gpt-6-astra, input (opens in a new tab)Checked October 24, 2026 |
| gpt-6-astra, output | USD 50 per 1M output tokens | Standard tier, up to 272K context. | Source for gpt-6-astra, output (opens in a new tab)Checked October 24, 2026 |
| gpt-6.1-sol, input | USD 2 per 1M input tokens | Cached input shown as $0.10 per 1M tokens. Standard tier, up to 272K context. | Source for gpt-6.1-sol, input (opens in a new tab)Checked October 24, 2026 |
| gpt-6.1-sol, output | USD 10 per 1M output tokens | Standard tier, up to 272K context. | Source for gpt-6.1-sol, output (opens in a new tab)Checked October 24, 2026 |
| gpt-6-luna, input | USD 0.10 per 1M input tokens | Cached input shown as $0.01 per 1M tokens. Standard tier, up to 272K context. | Source for gpt-6-luna, input (opens in a new tab)Checked October 24, 2026 |
| gpt-6-luna, output | USD 0.50 per 1M output tokens | Standard tier, up to 272K context. | Source for gpt-6-luna, output (opens in a new tab)Checked October 24, 2026 |
Prices checked on October 24, 2026 from the vendor's official page. Vendors change prices; confirm before buying. How we check prices. Official pricing page (opens in a new tab)
Who it's for
Developers and companies building applications on large language models.
Pros and limitations
Limitations
Long-context (>272K) requests cost more than the rates recorded here Output tokens cost several times more than input tokens
Tags
How this page was researched
This page is based on desk research of the vendor's public pages and documentation. SIDAN Stack has not tested this product hands-on. How we research. Last verified: October 24, 2026.
Sources
- OpenAI API pricing (opens in a new tab) - Pricing page, checked October 24, 2026
- OpenAI API pricing (marketing) (opens in a new tab) - Pricing page
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Guides and reviews mentioning OpenAI API
How to Compare AI API Pricing: Tokens, Units and Hidden Costs
To compare AI API pricing, estimate input, output and cached-input tokens per request, copy each model's per-million-token rates with their tier and context band, multiply by monthly volume, apply only documented batch and caching discounts, and check the result against the provider's rate limits and spend caps. This tutorial walks through the method with verified OpenAI and Anthropic rates as listed on 24 October 2026 and an illustrative worked example.
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