GPT 5 Mini

The gpt 5 mini api offers GPT-4o-level intelligence with sub-second latency. Optimized for high-volume production, this multimodal model supports 128k context windows for reliable extraction and real-time reasoning at a minimal cost.

Modalities

Context

API Usage Examples

curl --request POST "https://gptproto.com/v1/chat/completions" \
  --header "Authorization: Bearer $GPTPROTO_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
    "model": "gpt-5-mini",
    "messages": [
      {
        "role": "user",
        "content": "Hello"
      }
    ]
  }'

GPT 5 Mini pricing

Chat, coding agents & document work. Priced per 1M tokens — input, cached input and output are billed separately. GPTProto is 30% below official rates.

Your usage

Model

OpenAI · ≈ 148M tokens/mo (48M cached)

Monthly volume

OpenRouter

List + 5.5% credit fee

$51.91

per month

Input (non-cached)$8.44

Cache read$1.266

Output$42.20

OpenAI

Direct from OpenAI (list price)

$49.20

per month

Input (non-cached)$8

Cache read$1.2

Output$40

BEST VALUE

GPTProto

30% off official

$34.44

per month

After discount$34.44

Effective$34.44

Monthly cost by source

OpenRouter

$51.91

OpenAI

$49.20

GPTProto

$34.44

Save $14.76 / month

on GPTProto vs OpenAI (−30%)

Annual savings ≈ $177.12 · pay as you go

OpenRouter costs include its ~5.5% credit purchase fee. GPTProto applies a per-model discount (10–30% off) and your bonus credits are also spent at discounted rates — savings compound. Estimates assume a 60% cache hit rate.

Related Models

All Models

GPT 5 Mini

Current

byOpenAI400K context$0.175/M input$1.4/M output

DeepSeek Flash

byDeepSeek$0.3/M input$1.2/M output

Hy4 Preview

byHunyuan1.05M context$0.7923/M input$2.376/M output

GPT 6 Astra

byOpenAI1.05M context$8/M input$40/M output

Gemini 3.8 Flash

byGoogle1.05M context$0.9/M input$4.5/M output

Claude Fable 5.1

byClaude1M context$9/M input$45/M output

Qwen3.8 Max 0902

byQwen1M context$1.8/M input$5.4/M output

GLM 5.3 Flash

byZ-AI1.31M context$0.15/M input$0.5/M output

DeepSeek v4 Flash Vision Exp

byDeepSeek1.05M context$0.3/M input$1.2/M output

GLM 5.3

byZ-AI1.31M context$1.26/M input$3.96/M output

Gemini 3.7 Flash

byGoogle1.05M context$0.9/M input$4.5/M output

Grok 4.6

byGrok500K context$1.2/M input$3.6/M output

Qwen3.8 Max

byQwen1M context$1.8/M input$5.4/M output

Claude Opus 5

byClaude1M context$4.5/M input$22.5/M output

Gemini 3.6 Flash

byGoogle1.05M context$0.9/M input$4.5/M output

Kimi K3

byMoonshotAI1.05M context$2.7/M input$13.5/M output

GPT 5.6 Luna

byOpenAI1.05M context$0.16/M input$0.96/M output

GPT 5.6 Terra

byOpenAI1.05M context$1.6/M input$9.6/M output

GPT 5.6 Sol

byOpenAI1.05M context$3.2/M input$16/M output

Grok 4.5

byGrok500K context$1.2/M input$3.6/M output

Claude Sonnet 5

byClaude1M context$1.8/M input$9/M output

Minimax M3

byMiniMax1.05M context$0.48/M input$0.96/M output

GLM 5.2

byZ-AI1.05M context$1.26/M input$3.96/M output

GPT 5.1 Chat Latest

byOpenAI$1/M input$8/M output

Qwen3.7 Max

byQwen1M context$0.36/M input$1.44/M output

DeepSeek v4 Flash

byDeepSeek1.05M context$0.3/M input$1.2/M output

Grok 4.3

byGrok1M context$0.75/M input$1.5/M output

GPT 5.4 Pro

byOpenAI1.05M context$24/M input$144/M output

Kimi K2.6

byMoonshotAI262K context$0.855/M input$3.6/M output

Minimax M2.5

byMiniMax205K context$0.24/M input$0.96/M output

Kimi K2.5

byMoonshotAI262K context$0.54/M input$2.7/M output

Doubao Seed 1.6 Thinking (Build 250715)

byBytedance262K context$0.0971/M input$0.9714/M output

Doubao Seed 1.6 Thinking (Build 250615)

byBytedance262K context$0.0971/M input$0.9714/M output

Doubao Seed 1.6 Flash (Build 250615)

byBytedance262K context$0.0182/M input$0.1821/M output

Model					Input → Output
GPT 5 MiniCurrent $		400K	$0.17 / $1.40 per 1M	$0.02 / $0.02 per 1M	Input: TextInput: ImageInput: Document Output: Text
DeepSeek Flash $	—	—	$0.30 / $1.20 per 1M	— / $0.006 per 1M	Input: TextInput: Image Output: Text
Hy4 Preview $		1.05M	$0.79 / $2.38 per 1M	— / $0.04 per 1M	Input: Text Output: Text
GPT 6 Astra $		1.05M	$8.00 / $40.00 per 1M	$10.00 / $0.80 per 1M	Input: TextInput: ImageInput: Document Output: Text
Gemini 3.8 Flash $		1.05M	$0.90 / $4.50 per 1M	$0.60 / $0.09 per 1M	Input: TextInput: ImageInput: VideoInput: DocumentInput: Audio Output: Text
Claude Fable 5.1 $		1M	$9.00 / $45.00 per 1M	$11.25 / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
Qwen3.8 Max 0902 $		1M	$1.80 / $5.40 per 1M	$2.25 / $0.23 per 1M	Input: TextInput: ImageInput: VideoInput: DocumentInput: Audio Output: Text
GLM 5.3 Flash $	—	1.31M	$0.15 / $0.50 per 1M	— / $0.03 per 1M	Input: TextInput: ImageInput: VideoInput: Document Output: Text
DeepSeek v4 Flash Vision Exp $	—	1.05M	$0.30 / $1.20 per 1M	— / $0.006 per 1M	Input: TextInput: Image Output: Text
GLM 5.3 $		1.31M	$1.26 / $3.96 per 1M	— / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
Gemini 3.7 Flash $		1.05M	$0.90 / $4.50 per 1M	$0.60 / $0.09 per 1M	Input: TextInput: ImageInput: Document Output: Text
Grok 4.6 $		500K	$1.20 / $3.60 per 1M	— / $0.30 per 1M	Input: TextInput: Image Output: Text
Qwen3.8 Max $		1M	$1.80 / $5.40 per 1M	$2.25 / $0.23 per 1M	Input: TextInput: ImageInput: VideoInput: Document Output: Text
Claude Opus 5 $		1M	$4.50 / $22.50 per 1M	$5.63 / $0.45 per 1M	Input: TextInput: ImageInput: Document Output: Text
Gemini 3.6 Flash $		1.05M	$0.90 / $4.50 per 1M	$0.60 / $0.09 per 1M	Input: TextInput: ImageInput: Document Output: Text
Kimi K3 $		1.05M	$2.70 / $13.50 per 1M	$0.27 / $0.27 per 1M	Input: TextInput: ImageInput: Document Output: Text
GPT 5.6 Luna $		1.05M	$0.16 / $0.96 per 1M	$0.20 / $0.02 per 1M	Input: TextInput: ImageInput: Document Output: Text
GPT 5.6 Terra $		1.05M	$1.60 / $9.60 per 1M	$2.00 / $0.16 per 1M	Input: TextInput: ImageInput: Document Output: Text
GPT 5.6 Sol $		1.05M	$3.20 / $16.00 per 1M	$4.00 / $0.32 per 1M	Input: TextInput: ImageInput: Document Output: Text
Grok 4.5 $		500K	$1.20 / $3.60 per 1M	$0.30 / $0.30 per 1M	Input: TextInput: Image Output: Text
Claude Sonnet 5 $		1M	$1.80 / $9.00 per 1M	$2.25 / $0.18 per 1M	Input: TextInput: Document Output: Text
Minimax M3 $		1.05M	$0.48 / $0.96 per 1M	$0.10 / $0.10 per 1M	Input: TextInput: ImageInput: Document Output: Text
GLM 5.2 $		1.05M	$1.26 / $3.96 per 1M	$0.23 / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
GPT 5.1 Chat Latest $		—	$1.00 / $8.00 per 1M	$0.10 / $0.10 per 1M	Input: TextInput: ImageInput: Document Output: Text
Qwen3.7 Max $		1M	$0.36 / $1.44 per 1M	$0.07 / $0.07 per 1M	Input: TextInput: Document Output: Text
DeepSeek v4 Flash $	—	1.05M	$0.30 / $1.20 per 1M	— / $0.006 per 1M	Input: Text Output: Text
Grok 4.3 $		1M	$0.75 / $1.50 per 1M	$0.12 / $0.12 per 1M	Input: TextInput: Image Output: Text
GPT 5.4 Pro $		1.05M	$24.00 / $144.00 per 1M	—	Input: TextInput: ImageInput: Document Output: Text
Kimi K2.6 $		262K	$0.85 / $3.60 per 1M	$0.14 / $0.14 per 1M	Input: TextInput: Document Output: Text
Minimax M2.5 $		205K	$0.24 / $0.96 per 1M	$0.30 / $0.02 per 1M	Input: TextInput: Document Output: Text
Kimi K2.5 $		262K	$0.54 / $2.70 per 1M	$0.09 / $0.09 per 1M	Input: TextInput: Document Output: Text
Doubao Seed 1.6 Thinking (Build 250715) $		262K	$0.10 / $0.97 per 1M	—	Input: TextInput: Image Output: Text
Doubao Seed 1.6 Thinking (Build 250615) $		262K	$0.10 / $0.97 per 1M	—	Input: TextInput: Image Output: Text
Doubao Seed 1.6 Flash (Build 250615) $		262K	$0.02 / $0.18 per 1M	—	Input: TextInput: Image Output: Text

gpt 5 mini api Key Features

The gpt 5 mini api combines cutting-edge multimodal intelligence with industry-leading efficiency for production workloads.

Sub-second Latency

Optimized for real-time apps, typically achieving a Time To First Token under 200ms, ensuring your gpt 5 mini api integrations feel instantaneous.

Unmatched Cost Efficiency

At $0.15 per 1M input tokens, this gpt 5 mini api provides gpt-4 class intelligence at a fraction of the price, ideal for high-volume scaling.

Reliable JSON Outputs

Features 100% reliability in matching developer JSON schemas through constrained decoding, making the gpt 5 mini api a top choice for extraction.

Native Multimodal Power

Handles vision and audio tokens natively rather than using adapters, improving spatial reasoning and emotional detection for gpt interactions.

gpt 5 mini api Frequently Asked Questions

Find answers to technical and billing questions about the gpt 5 mini api and how to integrate it into your existing workflow through our platform.

How does gpt 5 mini api differ from direct OpenAI access?

Our platform provides a single API key for multiple providers, unified logging, and automatic failover. If an OpenAI region experiences downtime, our system intelligently reroutes your gpt 5 mini api requests to ensure your application stays online without manual intervention or code changes, providing a more robust infrastructure for production environments than a single direct connection.

Is data used for training the gpt 5 mini api?

No. Privacy is a core pillar of our service. Data processed through the gpt 5 mini api via our platform is never used to train the underlying OpenAI models or our own proprietary systems. Your inputs, prompt structures, and outputs remain strictly confidential and are only accessible through your secure developer dashboard for monitoring and logging purposes.

What is the typical latency of the gpt 5 mini api?

The gpt 5 mini api is optimized for speed. For a standard 50-token prompt, you can expect a Time To First Token (TTFT) of approximately 180ms. Total response time typically stays under 300ms. This makes it the ideal candidate for conversational AI, real-time customer support bots, and low-latency agentic routing where user experience depends on instantaneous feedback.

How do I migrate from gpt-4o-mini to this model?

Migration is seamless. Because the gpt 5 mini api maintains backward compatibility with existing SDKs, you only need to update the model parameter in your code to 'gpt-5-mini'. All existing tool definitions, system instructions, and JSON schemas will function as expected, often with improved accuracy and faster execution speeds right out of the box.

Is fine-tuning supported for the gpt 5 mini api?

Fine-tuning for the gpt 5 mini api is currently available in a Private Beta. This allows organizations to tailor the model's behavior to specific domain knowledge or unique linguistic styles. If your use case requires specialized tuning for the gpt 5 mini api, please reach out to our support team to request early access to these features.

Is enterprise billing available for gpt 5 mini api?

Yes, we support enterprise-grade billing for high-volume users of the gpt 5 mini api. This includes monthly invoicing, volume-based discounts that can exceed standard direct rates, and dedicated account management. Our platform is designed to scale with your business, providing predictable costs as your gpt 5 mini api usage grows across different departments.