o4-mini

reasoning

o4-mini is our latest small o-series model. It's optimized for fast,

Intelligence
Reasoning
Speed
Context
200K
Max output
100K
Input price
$1.1/1M tokens
Output price
$4.4/1M tokens
Snapshotso4-mini-2025-04-16
Capabilities
vision
tool call
structured output
reasoning
json mode
streaming
fine tuning
batch
Details
Provider OpenAI
Creator OpenAI
Familyo4
Statusactive
Input modalitiestext, image
Output modalitiestext
Knowledge cutoff2024-05
Release date—
Deprecation date—
Typereasoning
Reasoning tokensYes
Max input—
Sourceofficial
Last updated2026-03-22
Tools
Function Callingfunction_calling
Call external functions and APIs
File Searchfile_search
Search across uploaded files
Code Interpretercode_interpreter
Execute code in a sandbox
MCPmcp
Connect to Model Context Protocol servers
Web Searchweb_search
Search the web for information
Endpoints
Chat CompletionsPOST
Generate chat responses with messageshttps://api.openai.com/v1/chat/completions
ResponsesPOST
Stateful multi-turn conversationshttps://api.openai.com/v1/responses
BatchPOST
Async batch processing at lower costhttps://api.openai.com/v1/batches
Fine-tuningPOST
Train custom models on your datahttps://api.openai.com/v1/fine_tuning/jobs
Pricing
Fine-tuning
TrainingInputCached inputOutput
Standard—$4$1$16
Batch—$2—$8
Family Comparison: o4
ModelContextMax outInputOutput
o4-miniRVTS
200K100K$1.1$4.4
o4-mini-deep-researchRVS
200K100K$2$8
API
GET/v1/models/openai/o4-mini

o4-mini

o4-mini is our latest small o-series model. It's optimized for fast,

o4-mini-2025-04-16
Changes · 2 entries
o4-miniupdateb50649fMar 21, 2026, 11:58 PM
pricingtiers[{"label":"Fine-tuning","unit":"","columns":["Training","...
descriptionOpenAI o4-mini is a compact reasoning model in the o-seri...→o4-mini is our latest small o-series model. It's optimize...
capabilitiesstreamingyesvisionyesfine tuningyes
knowledge_cutoff2024-05
model_typereasoning
reasoning_tokensyes
reasoning4
taglineFast, cost-efficient reasoning model, succeeded by GPT-5 ...
tools["function_calling","file_search","code_interpreter","mcp...
endpoints["chat_completions","responses","batch","fine_tuning"]
o4-minicreate7f5c66fMar 21, 2026, 05:16 AM