GPT 5 Nano
openai/gpt-5-nanoGPT 5 Nano is a reasoning model by OpenAI with vision, function calling, prompt caching, structured output — designed for complex, multi-step problem solving where accuracy matters more than speed. It supports a 400K token context window with up to 128K tokens of output. Priced at $0.05 per million input tokens and $0.4 per million output tokens, it is one of the most cost-efficient options in its class. Access GPT 5 Nano through Inworld LLM Inference with OpenAI SDK compatibility, built-in failover, and intelligent routing across providers.
- Input
- $0.05
- Output
- $0.40
- Cache read
- $0.005
- Context
- 400K
- Max output
- 128K
curl --fail-with-body https://api.inworld.ai/v1/chat/completions \
-H "Authorization: Basic $INWORLD_API_KEY" \
-H 'Content-Type: application/json' \
-d '{
"model": "openai/gpt-5-nano",
"messages": [{"role": "user", "content": "Hello"}],
"stream": true
}'Pricing and providers
Access GPT 5 Nano through Inworld LLM Inference or speech to speech via OpenAI. By using the providers below you agree to their terms, listed under each provider's name in the Legal section.
| Modalities | |||||||
|---|---|---|---|---|---|---|---|
OpenAIThis pageopenai/gpt-5-nano | $0.05 | $0.40 | $0.005 | — | 400K | 128K | TextImageFile→Text |
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