Ways to buy 1
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
 OpenAI APIThe lab's own API | $15 | $120 | $15 / $120List price | n/a | List price |
USD per 1M tokens; batch $7.5 in, $60 out on the lab's API. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $3,900 direct.
Helicone$3,900+0%
Kong AI Gateway$3,900+0%
LiteLLM$3,900+0%
Vercel AI Gateway$3,900+0%
Cloudflare AI Gateway$4,095+5%
Requesty$4,095+5%
Eden AI$4,115+5.5%
OpenRouter$4,115+5.5%
No published token fee: Martian Gateway, Portkey, TrueFoundry AI Gateway.
Related models
| In / out per 1M | Cheapest route | ||||||
|---|---|---|---|---|---|---|---|
| GPT-6 Luna OpenAI · 1.05MCheapest: $0.1 on OpenAI (flex) | $0.1 | $0.5 | $0.1 / $0.5 | $0.2 | 1.05M | $0.1 on OpenAI (flex) | · |
| GPT-6 Luna Pro OpenAI · 1.05MCheapest: $0.1 on OpenAI (flex) | $0.1 | $0.5 | $0.1 / $0.5 | $0.2 | 1.05M | $0.1 on OpenAI (flex) | · |
| GPT-6 Sol OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · |
| GPT-6 Sol Pro OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · |
 Claude Fable 5.1Anthropic · 1M | $10 | $50 | $10 / $50 | $20 | 1M | Lab list price | · |
| Claude Fable 5 Anthropic · 1M | $10 | $50 | $10 / $50 | $20 | 1M | Lab list price | · |
| Claude Opus 4.1 Anthropic · 200K | $15 | $75 | $15 / $75 | $30 | 200K | Lab list price | · |
About GPT-5 Pro
GPT-5 Pro is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience.
Takes image, text, files in and returns text. First listed Oct 7, 2025. Up to 128K output tokens. Blended price $41.3 per 1M tokens at 3 input to 1 output. Model id gpt-5-pro.
Price history
List price since Oct 7, 2025, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
Questions
How much does GPT-5 Pro cost?
$15 per million input tokens and $120 per million output tokens, or $7.5 and $60 through the Batch API.
What is the context window of GPT-5 Pro?
400K tokens, with up to 128K tokens of output.
Sources: OpenRouter's public model catalog and each provider's own pricing page, read every morning at 05:00 UTC; gateway fees re-read every Monday. List prices: your contract may differ. Logos via logo.dev; trademarks belong to their owners.