Ways to buy 1
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
 OpenAI APIThe lab's own API | $20 | $80 | $20 / $80List price | n/a | List price |
USD per 1M tokens. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $3,600 direct.
Helicone$3,600+0%
Kong AI Gateway$3,600+0%
LiteLLM$3,600+0%
Vercel AI Gateway$3,600+0%
Cloudflare AI Gateway$3,780+5%
Requesty$3,780+5%
Eden AI$3,798+5.5%
OpenRouter$3,798+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 o3 Pro
The o-series of models are trained with reinforcement learning to think before they answer and perform complex reasoning.
Takes text, files, image in and returns text. First listed Jun 13, 2025. Up to 100K output tokens. Blended price $35 per 1M tokens at 3 input to 1 output. Overall score 2 on leadersboard.fru.dev (rank 47). Model id o3-pro.
Price history
List price since Jun 13, 2025, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
Questions
How much does o3 Pro cost?
$20 per million input tokens and $80 per million output tokens.
What is the context window of o3 Pro?
200K tokens, with up to 100K 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.