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OpenAI: GPT-5 Mini

GPT-5 Mini is a compact version of GPT-5, designed to handle lighter-weight reasoning tasks. $0.25 per million input tokens, $2 per million output tokens. 400,000 token context window. Higher uptime with 2 providers. Includes independent benchmarks from Artificial Analysis.

View source on OpenRouter
Overview

Model specifications

Context
400,000 tokens
Maximum output
128,000 tokens
Architecture
text+image+file->text
Tokenizer
GPT
Knowledge cutoff
2024-05-31
Moderated
Yes
OPENROUTER

Complete pricing

Synchronized OpenRouter rates. Token prices are shown per one million tokens.

Input
$0.25
/M tokens
Output
$2
/M tokens
Cache read
$0.03
/M tokens
API

Model configuration

Reasoning

Moderated
Yes
Default parameters
medium
Capabilities
high, medium, low, minimal
API

Quick start

Call this exact model ID through OpenRouter’s OpenAI-compatible API.

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-5-mini","messages":[{"role":"user","content":"Hello!"}]}'
Capabilities

Input → Output

Input
textimagefile
Output
text
Reasoning

No · high · medium · low · minimal

API

Supported API parameters

include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools
Available providers

4 providers

Live providers on OpenRouter

Provider availability, latency, throughput and routing can change continuously. Open the source page for current operational data.

OpenRouter

OpenAI

unknown
Context
400K
Maximum output
128K
Input
$0.125
Output
$1.00
Cache read
$0.012
Cache write
Not provided

Azure

unknown
Context
400K
Maximum output
360K
Input
$0.250
Output
$2.00
Cache read
$0.030
Cache write
Not provided

OpenAI

unknown
Context
400K
Maximum output
128K
Input
$0.250
Output
$2.00
Cache read
$0.025
Cache write
Not provided

Azure

unknown
Context
400K
Maximum output
360K
Input
$0.275
Output
$2.20
Cache read
$0.033
Cache write
Not provided
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Context
1.1M
Input
file · image · text
Output
text
Input: $0.200Output: $1.20per 1M tokens
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OpenAI: GPT-5.6 Terra Pro

GPT-5.6 Terra Pro is the same underlying model as GPT-5.6 Terra, served with reasoning.mode set to pro for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode

Context
1.1M
Input
file · image · text
Output
text
Input: $2.00Output: $12.00per 1M tokens
View model details →