GPT API pricing & models

OpenAI · 7 live models

KumoAPI serves 7 OpenAI models: GPT-5.6 Luna, GPT-5 mini, GPT-5, GPT-5.3 Codex, GPT-5.6 Terra, GPT-5.5, GPT-5.6 Sol. Input costs 0.2–5 Credits / M tokens (1 Credit = ¥1). one API key for all of them, pay as you go.

Get an API KeySee pricingConnect with Codex
Live models
7
Lowest input price
0.2Credits / M
Largest context
1.05Mtokens
Avg. 7-day uptime
—

OpenAI model pricing

KumoAPI default channel price in Credits (1 Credit = ¥1); struck-through is the list price. Click a model for full pricing, protocols and uptime.

ModelContext · outputInput / MOutput / M7-day uptime
GPT-5.6 Lunagpt-5.6-luna1.05M · 128K0.21.2—
GPT-5 minigpt-5-mini400K · 128K0.252—
GPT-5gpt-5400K · 128K1.2510—
GPT-5.3 Codexgpt-5.3-codex400K · 128K1.7514—
GPT-5.6 Terragpt-5.6-terra1.05M · 128K212—
GPT-5.5gpt-5.51.05M · 128K530—
GPT-5.6 Solgpt-5.6-sol1.05M · 128K530—

Input (prompt) / Output (completion) are per 1M tokens; image and video models show their primary unit price. Uptime comes from KumoAPI probes; a dash means not probed yet.

OpenAI model capabilities

Exactly as flagged in the catalog.

CapabilityGPT-5.6 LunaGPT-5 miniGPT-5GPT-5.3 CodexGPT-5.6 TerraGPT-5.5GPT-5.6 Sol
Vision
Function Calling
Reasoning
Prompt Caching
Response Schema
Audio
Video
File Input
Streaming
Web Search
Realtime
Session
Media
Multipart Form
Binary Response

Compare OpenAI models

Pricing, context, capabilities and uptime side by side.

GPT-5.6 Luna vs GPT-5 miniGPT-5.6 Luna vs GPT-5GPT-5.6 Luna vs GPT-5.3 CodexGPT-5.6 Luna vs GPT-5.6 TerraGPT-5.6 Luna vs GPT-5.5GPT-5.6 Luna vs GPT-5.6 SolGPT-5 mini vs GPT-5GPT-5 mini vs GPT-5.3 CodexGPT-5 mini vs GPT-5.6 TerraGPT-5 mini vs GPT-5.5GPT-5 mini vs GPT-5.6 SolGPT-5 vs GPT-5.3 CodexGPT-5 vs GPT-5.6 TerraGPT-5 vs GPT-5.5GPT-5 vs GPT-5.6 SolGPT-5.3 Codex vs GPT-5.6 TerraGPT-5.3 Codex vs GPT-5.5GPT-5.3 Codex vs GPT-5.6 SolGPT-5.6 Terra vs GPT-5.5GPT-5.6 Terra vs GPT-5.6 Sol

FAQ

How much does the GPT API cost on KumoAPI?

OpenAI models cost 0.2–5 Credits / M input tokens, with 1 Credit = ¥1; the cheapest is GPT-5.6 Luna. That is up to 0% below list price — see the table above.

Which GPT model has the largest context window?

GPT-5.6 Luna, with 1.05M tokens. Context and max output for every model are in the pricing table above.

Can I pay for the GPT API with Alipay?

Yes. KumoAPI accepts Alipay top-ups; 1 Credit = ¥1, billed per use with no monthly fee or minimum.

One API key for every OpenAI model

Free credits on sign-up, pay as you go, no monthly fee.

Get an API Key