OpenAI
GPT 5 Nano
GPT 5 Nano — ultra-efficient OpenAI model
gpt-5-nanoPricing
~88%- Input
- $0.005825 / 1,000,000 tokens
- Output
- $0.0466 / 1,000,000 tokens
- Cache read
- $0.000583 / 1,000,000 tokens
- Cache write
- $0.005825 / 1,000,000 tokens
Discount history
Model details
- Input
- text
- Output
- text
- Context window
- 400,000 tokens
- Maximum output
- 128,000 tokens
- Availability
- $8.6KUncapped capacity
- Updated
- 11/8/2026, 3:58:06 AM UTC
Capacity is reserved when your request is accepted.
Capabilities
ChatStreamingTool callingReasoning
Supported parameters
max_tokenstemperaturetop_pfrequency_penaltypresence_penaltylogit_biaslogprobstop_logprobsstoptoolstool_choiceresponse_formatseedstructured_outputs