Model detail
gpt-5-mini-2025-08-07
GPT-5 Mini is a compact version of GPT-5, designed to handle lighter-weight reasoning tasks. It provides the same instruction-following and safety-tuning benefits as GPT-5, but with reduced latency and cost. GPT-5 Mini is the successor to OpenAI's o4-mini model.
Model specs
- Context length
- 400K
- Max output
- 128K
- I/O modalities
- Text / Image
- Released
- 2025-08
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API endpoints
One MixRoute gateway, OpenAI-compatible
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OpenAI-compatible
/v1/chat/completionsPOST
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Pricing
Flat rate, unit: /1M Tokens
Input
$0.2500 /1M Tokens
Completion
$2.0000 /1M Tokens
Cache read
$0.0250 /1M Tokens
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Selection summary
Quickly judge whether it fits your workload
What is this model good for?
Cost-efficient reasoning for everyday tasks
Use GPT-5 Mini for lighter-weight reasoning tasks where you need GPT-5's instruction-following quality at reduced latency and cost. It is the successor to o4-mini, offering improved safety tuning.
What should you check before using it?
Confirm reasoning depth meets your task needs
GPT-5 Mini trades some reasoning depth for speed and cost. Test your specific tasks to confirm the accuracy meets your requirements compared to the full GPT-5 model.
Why use it through MixRoute?
Use the OpenAI-compatible endpoint with stable model ID
Use the confirmed compatible endpoint with model ID gpt-5-mini through MixRoute, then run the same integration tests used for the current client.
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Token cost estimator
Live estimate from this page's pricing, not an actual bill
Share of the same prefix read repeatedly, up to 100%
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FAQ
GPT-5 Mini is a compact version of GPT-5 designed for lighter-weight reasoning tasks. It provides the same instruction-following and safety-tuning benefits as GPT-5 with reduced latency and cost. It is the successor to OpenAI’s o4-mini model.
One endpoint, a testable decision
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.