OpenAI model

GPT-5 Nano API

Send openai/gpt-5-nano for the cheapest OpenAI 400k id in this catalog: 0.05 input and 0.4 output per million tokens. It lists the same window as GPT-5 Mini, but Mini is the measured one. Do not treat Nano as 80% Safe Hit Rate. That number is Mini's.

Read quickstartEstimate cost
OpenAIPlatform curatedCatalog
Function Calling
Input price$0.05 / 1M tokens
Output price$0.4 / 1M tokens
Context length400k tokens
Max output8.2k tokens

What is GPT-5 Nano API in NextModel?

Send openai/gpt-5-nano for the cheapest OpenAI 400k id in this catalog: 0.05 input and 0.4 output per million tokens. It lists the same window as GPT-5 Mini, but Mini is the measured one. Do not treat Nano as 80% Safe Hit Rate. That number is Mini's.

GPT-5 Nano via NextModel: 400k-token context; $0.05 / 1M tokens in / $0.4 / 1M tokens out per 1M tokens. Capabilities: streaming, tool, json.

Best use cases

  • High-volume OpenAI vision or tool calls where 0.05 input is the point.
  • A floor price behind Mini or GPT-5 on the same base URL.
  • Jobs that fit the 400,000 token window and can tolerate unpublished cache behavior.

When not to use

  • You need the measured cache id. Use openai/gpt-5-mini.
  • You need more than 400k. GPT-5.4 lists 1,050,000.
  • Output quality is unpublished. Nano is a price pick, not a proven quality pick.

OpenAI-compatible code example

request.sh
curl https://api.nextmodel.app/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $NEXTMODEL_API_KEY" \
  -d '{"model":"openai/gpt-5-nano","messages":[{"role":"user","content":"Reply with OK."}]}'

Switching models only changes the model field.

Try it in the playground

Similar alternatives

OpenAICatalog

GPT-4.1

GPT-4.1 via NextModel: 1M-token context; $2 / 1M tokens in / $8 / 1M tokens out per 1M tokens. Capabilities: streaming, tool, json.

$2 / 1M tokensInput$8 / 1M tokensOutput1MContext
Best forimage understanding, multimodal chat
StreamingTool callingJSON modeVision
Platform curatedCurated and maintained in the NextModel catalog
View details
OpenAICatalog

GPT-4.1 Mini

GPT-4.1 Mini via NextModel: 1M-token context; $0.4 / 1M tokens in / $1.60 / 1M tokens out per 1M tokens. Capabilities: streaming, tool, json.

$0.4 / 1M tokensInput$1.60 / 1M tokensOutput1MContext
Best forimage understanding, multimodal chat
StreamingTool callingJSON modeVision
Platform curatedCurated and maintained in the NextModel catalog
View details
OpenAICatalog

GPT-4.1 Nano

GPT-4.1 Nano via NextModel: 1M-token context; $0.1 / 1M tokens in / $0.4 / 1M tokens out per 1M tokens. Capabilities: streaming, tool, json.

$0.1 / 1M tokensInput$0.4 / 1M tokensOutput1MContext
Best forimage understanding, multimodal chat
StreamingTool callingJSON modeVision
Platform curatedCurated and maintained in the NextModel catalog
View details

Compare GPT-5 Nano

GPT-5 Nano vs GPT-4.1GPT-5 Nano vs GPT-4.1 MiniGPT-5 Nano vs GPT-4.1 NanoGPT-5 Nano vs GPT-4oGPT-5 Nano vs GPT-4o-mini

Reading

Articles that explain GPT-5 Nano

FAQ

GPT-5 Nano API questions

What model id do I send for GPT-5 Nano?

Send openai/gpt-5-nano to https://api.nextmodel.app/v1.

Does Nano inherit Mini's cache scores?

No. CacheSafety is unpublished for this exact id.

Price versus Mini?

Nano 0.05 / 0.40. Mini 0.25 / 2. Same listed 400,000 token window.

Start now

Ready to start building?

Passwordless signup, pay-as-you-go billing, and one OpenAI-compatible endpoint for every model. Create your key and send your first request in minutes.

Get your API keyRead the quickstart