GPT-5.3 Instant

gpt-5.3-chat-latest

Run GPT-5.3 Instant in a hosted Python Task with structured output, web search and file inputs.

Fast variant of GPT-5.3 optimized for everyday tasks. Delivers responsive, low-latency performance for real-time applications and conversational workflows.

What GPT-5.3 Instant supports in qbash

Structured outputReplies as JSON that matches a schema you pass.
Web searchSearches the web while it answers.
Reasoning effort3 levels, from none to medium.
Image inputReads WEBP, PNG, JPEG and GIF images.
Document inputReads PDF, TEXT, DOC, XLS, RTF and 7 more files.
Prompt cachingRepeated input is billed at the cached rate.

What is qbash?

qbash is where you build Tasks: Python programs that run a business process on managed infrastructure. Your code runs the steps and calls a model like GPT-5.3 Instant only at the ones that need judgment, with integrations, memory and files available in the same script.

A developer writes the Task once, and anyone on the team runs it from a form, on a schedule, from a webhook or from chat. Each Task is versioned and every run is logged.

How Tasks work

Specifications

Context window: 400Ktokens
Max output: 128,000tokens

Structured output with GPT-5.3 Instant in a Python Task

qbash.ai.raw calls GPT-5.3 Instant from a Task. Pass a JSON Schema as output_schema and the reply comes back as a Python dict that matches it, ready to route to a connector.

main.py
ticket = qbash.inputs.get("ticket")

triage = qbash.ai.raw(
    f"Summarize this support ticket and rate its urgency:\n\n{ticket}",
    model="gpt-5.3-chat-latest",
    output_schema={
        "type": "object",
        "properties": {
            "summary": {"type": "string"},
            "urgency": {"type": "string", "enum": ["low", "medium", "high"]},
        },
        "required": ["summary", "urgency"],
    },
)

# triage is a dict, e.g. {"summary": "...", "urgency": "high"}
if triage["urgency"] == "high":
    qbash.integrations.slack.create_message(
        channel="#support",
        text=triage["summary"],
    )

qbash.output(triage)

Structured output in Tasks

Use GPT-5.3 Instant with web search

Turn on Web Search in an inline prompt's model bar and GPT-5.3 Instant searches the web while it answers. Searches are billed at $10.00 per 1,000.

Provider web tools

Reasoning effort with GPT-5.3 Instant

Set Effort to none, low and medium in the prompt's Settings. The default is medium. Higher effort spends more tokens on reasoning before the reply.

GPT-5.3 Instant pricing

Input	$1.75 per 1M tokens
Output	$14.00 per 1M tokens
Cached input	$0.175 per 1M tokens
Web search	$10.00 per 1K searches

Standard rates in USD.

Supported file formats

Images

WEBP up to 20 MB
PNG up to 20 MB
JPEG up to 20 MB
GIF up to 20 MB

Documents

PDF
TEXT
DOC
XLS
RTF
DOCX
XLSX
PPTX
PPT
ODT
ODP
ODS