Ways to buy 5
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
 OpenAIflex, cheapest · cached $0.037 | $0.375 | $2.25 | $0.375 / $2.25-50% vs list | $0.037 | -50% vs list |
| OpenAI API The lab's own API · cached $0.075 | $0.75 | $4.5 | $0.75 / $4.5List price | $0.075 | List price |
 Azure AI FoundryDefault region · cached $0.075 | $0.75 | $4.5 | $0.75 / $4.5Same as list | $0.075 | Same as list |
| Azure AI Foundry us · cached $0.083 | $0.825 | $4.95 | $0.825 / $4.95+10% vs list | $0.083 | +10% vs list |
| OpenAI fast · cached $0.15 | $1.5 | $9 | $1.5 / $9+100% vs list | $0.15 | +100% vs list |
USD per 1M tokens; batch $0.375 in, $2.25 out on the lab's API. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $165.00 direct.
Helicone$165.00+0%
Kong AI Gateway$165.00+0%
LiteLLM$165.00+0%
Vercel AI Gateway$165.00+0%
Cloudflare AI Gateway$173.25+5%
Requesty$173.25+5%
Eden AI$174.07+5.5%
OpenRouter$174.07+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) | · |
 Muse Spark 1.3Meta · 1M | $1.25 | $4.25 | $1.25 / $4.25 | $2 | 1M | Lab list price | · |
 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) | · |
| Muse Spark 1.1 Meta · 1M | $1.25 | $4.25 | $1.25 / $4.25 | $2 | 1M | Lab list price | · |
 Qwen3.8 Max (0902)Qwen (Alibaba) · 1M | $2 | $6 | $2 / $6 | $3 | 1M | Lab list price | · |
About GPT-5.4 Mini
GPT-5.4 mini brings the core capabilities of GPT-5.4 to a faster, more efficient model optimized for high-throughput workloads.
Takes files, image, text in and returns text. First listed Mar 19, 2026. Up to 128K output tokens. Blended price $1.69 per 1M tokens at 3 input to 1 output. Model id gpt-5-4-mini.
Price history
List price since Mar 19, 2026, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
Questions
How much does GPT-5.4 Mini cost?
$0.75 per million input tokens and $4.5 per million output tokens, with cached input at $0.075, or $0.375 and $2.25 through the Batch API.
What is the context window of GPT-5.4 Mini?
400K tokens, with up to 128K tokens of output.
Where is GPT-5.4 Mini cheapest?
Of 5 routes tracked, OpenAI is cheapest at $0.375 input and $2.25 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.