Ways to buy 4
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
 OpenAIflex, cheapest · cached $0.013 | $0.125 | $1 | $0.125 / $1-50% vs list | $0.013 | -50% vs list |
| OpenAI API The lab's own API · cached $0.025 | $0.25 | $2 | $0.25 / $2List price | $0.025 | List price |
 Azure AI FoundryDefault region · cached $0.03 | $0.25 | $2 | $0.25 / $2Same as list | $0.03 | Same as list |
| Azure AI Foundry swedencentral · cached $0.033 | $0.275 | $2.2 | $0.275 / $2.2+10% vs list | $0.033 | +10% vs list |
USD per 1M tokens; batch $0.125 in, $1 out on the lab's API. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $65.00 direct.
Helicone$65.00+0%
Kong AI Gateway$65.00+0%
LiteLLM$65.00+0%
Vercel AI Gateway$65.00+0%
Cloudflare AI Gateway$68.25+5%
Requesty$68.25+5%
Eden AI$68.58+5.5%
OpenRouter$68.58+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) | · |
 Gemini 3.8 FlashGoogle · 1MCheapest: $0.75 on Google Gemini API (flex) | $0.75 | $3.75 | $0.75 / $3.75 | $1.5 | 1M | $0.75 on Google Gemini API (flex) | · |
 GLM 5.3Z.ai · 1.31M | $0.561 | $1.76 | $0.561 / $1.76 | $0.862 | 1.31M | on Baidu (fp8) | · |
| Gemini 3.7 Flash Google · 1MCheapest: $0.75 on Google Vertex AI (global-flex) | $0.75 | $3.75 | $0.75 / $3.75100% | $1.5 | 1M | $0.75 on Google Vertex AI (global-flex) | 100% |
| GLM 4.6 Z.ai · 205K | $0.43 | $1.75 | $0.43 / $1.75 | $0.76 | 205K | on Venice (fp4) | · |
About GPT-5 Mini
GPT-5 Mini is a compact version of GPT-5, designed to handle lighter-weight reasoning tasks.
Takes text, image, files in and returns text. First listed Aug 12, 2025. Up to 128K output tokens. Blended price $0.688 per 1M tokens at 3 input to 1 output. Model id gpt-5-mini.
Price history
List price since Aug 12, 2025, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
Questions
How much does GPT-5 Mini cost?
$0.25 per million input tokens and $2 per million output tokens, with cached input at $0.025, or $0.125 and $1 through the Batch API.
What is the context window of GPT-5 Mini?
400K tokens, with up to 128K tokens of output.
Where is GPT-5 Mini cheapest?
Of 4 routes tracked, OpenAI is cheapest at $0.125 input and $1 output per million tokens.
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.