Can you call gpt-5-nano-2025-08-07 with the OpenAI SDK you already use?

Yes. gpt-5-nano-2025-08-07 is served through an OpenAI-compatible endpoint. You can continue using your existing OpenAI SDK by changing the base URL and model ID.

What should you evaluate before moving production traffic to gpt-5-nano-2025-08-07?

Test your developer tools and real-time applications. Confirm that the accuracy meets your requirements given the model’s focus on speed and cost over deep reasoning.

What is the max output length for gpt-5-nano-2025-08-07?

gpt-5-nano-2025-08-07 supports up to 128000 output tokens per request. Plan your prompts to stay within this limit, and use the max_tokens or max_completion_tokens parameter to control output length.

Does gpt-5-nano-2025-08-07 have a free tier?

GPT-5 nano is billed per use and the record publishes no free-tier allowance. The current published rates are input $0.0500 per 1M tokens and output $0.4000 per 1M tokens. Trial credit or promotional quota is tied to your account rather than to the model, so check the console before planning around a free tier.

How much does prompt caching save on gpt-5-nano-2025-08-07?

gpt-5-nano-2025-08-07 supports prompt caching, which can significantly reduce costs for repeated prompts with shared prefixes. The cache read price is substantially lower than the standard input price. Check the current pricing page for the exact cache hit discount ratio for gpt-5-nano-2025-08-07.

Model detail

GPT-5 nano 20250807

Provided by OpenAI

Pay-as-you-go

GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger counterparts, it retains key instruction-following and safety features. It is the successor to GPT-4.1-nano and offers a lightweight option for cost-sensitive or real-time applications.

Model specs

Model ID: gpt-5-nano-2025-08-07

Context length: 400K
Max output: 128K
I/O modalities
Released: 2025-08

API endpoints

One MixRoute gateway, OpenAI-compatible

OpenAI-compatible /v1/chat/completions POST

Pricing

Flat rate, unit: /1M Tokens

Input

$0.0500 /1M Tokens

Completion

$0.4000 /1M Tokens

Cache read

$0.0050 /1M Tokens

Selection summary

Quickly judge whether it fits your workload

What is this model good for?

Ultra-fast developer tools and real-time interactions

Use GPT-5-Nano for developer tools, rapid interactions, and ultra-low latency environments. It retains key instruction-following and safety features while being the most cost-effective option in the GPT-5 series.

What should you check before using it?

Confirm accuracy for your task class

GPT-5-Nano has limited reasoning depth compared to larger models. Test your developer tools and rapid interaction tasks to confirm the accuracy meets your requirements. Knowledge cutoff: 2024-05-31.

Why use it through MixRoute?

Swap the base URL, keep the GPT-5 nano client

MixRoute serves GPT-5 nano on the OpenAI-compatible endpoint /v1/chat/completions; point your existing client at https://api.mixroute.ai/v1 with the model ID gpt-5-nano-2025-08-07 and re-run your integration tests.

Capabilities & compatibility

Unconfirmed capabilities stay "Unknown," no guesses

Tool calling

GPT-5 nano supports function and tool calls.

EX Send a tools definition; the response returns tool_calls to execute and feed results back.

Structured output

GPT-5 nano can produce JSON-formatted output on demand.

EX response_format: { type: "json_schema" } forces valid JSON output.

Streaming

GPT-5 nano supports streamed responses.

EX stream: true streams tokens incrementally, so chat UIs render as they arrive.

Prompt caching

GPT-5 nano supports prompt caching under supported routing conditions.

EX Keep the system prompt and tool definitions at the start of the request; repeated prefixes are automatically billed at the cache-read rate.

Vision input

GPT-5 nano can process image inputs alongside text.

EX Pass a base64-encoded image in a image_url content part alongside text messages.

OpenAI SDK

Call GPT-5 nano through MixRoute's OpenAI-compatible endpoint.

EX Change base_url to https://api.mixroute.ai/v1; everything else follows the OpenAI style.

Token cost estimator

Live estimate from this page's pricing, not an actual bill

Input tokens Max per request 400K

Output tokens Max per request 128K

Requests / month

Cache hit rate 0%

Share of the same prefix read repeatedly, up to 100%

FAQ

To get a cache hit on gpt-5-nano-2025-08-07, send requests with identical prompt prefixes. The cache is keyed by the beginning of your prompt; as long as the prefix matches a previous request, subsequent calls benefit from the lower cached rate. Keep system messages and initial context consistent across calls for best results.

Get started

01

Create an API key

Generate a key in the Console; one key calls every model.
02

Set the base URL

Fully OpenAI SDK-compatible; just swap the URL to connect.

https://api.mixroute.ai/v1
03

Specify the model ID

In the request's model field, enter:

gpt-5-nano-2025-08-07

Create an API key

New users get $5 in free credits

Test this model and alternate routes with the same request format

Start from a real workload, then let quality, total cost, and failure conditions decide whether to send production traffic.

Create an API key View integration docs