OpenAI: GPT-5.3 Chat

Public pricingIntelligence 79/100Medium memoryVisionTool use

OpenAI: GPT-5.3 Chat is a multimodal model for vision-language understanding. It combines multimodal input handling and image understanding with a 128K tokens context window and a balanced-cost profile. Use it for vision-language understanding and content analysis when quality, speed, and cost matters.

Input

$1.75/1M

Output

$14.00/1M

Cached

$0.17/1M

Batch

$0.88/1M

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What would GPT-5.3 Chat cost you?

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Technical specifications

GPT-5.3 Chat at a glance.

Memory

128,000

tokens

Max reply

16,384

tokens

Memory tier

Medium

a long report or a codebase file

Tokenizer

tiktoken-o200k

Released

Mar 2026

Training cutoff

Jul 2025

Availability

Public pricing

Status

active

What it can do

Capabilities & limits.

  • Understands images
  • Deep step-by-step thinking
  • Uses tools / calls functions
  • Strict JSON output
  • Streams replies
  • Fine-tunable on your data

When to pick GPT-5.3 Chat

  • Screenshot analysis, image understanding, or document OCR.
  • Agentic workflows that call tools or APIs.
  • Code generation, review, or refactoring.
  • Multimodal pipelines mixing text + images.

When to look elsewhere

  • Very latency-sensitive, real-time apps where every millisecond counts.

Alternatives

Similar models to compare.

FAQ

GPT-5.3 Chat — the questions we see most.

Pricing, capabilities, alternatives — generated from the same data that powers the calculator above.

Get instant answers from our AI agent

At a typical workload of 50,000 conversations a month with 1,500-token prompts and 800-token replies, GPT-5.3 Chat costs roughly $691 per month. Input is $1.75 /1M tokens and output is $14.00 /1M tokens.
GPT-5.3 Chat has a 128,000-token context window (medium memory — a long report or a codebase file). That means you can fit about 24,000 words of input and history in a single call.
Beyond text generation, GPT-5.3 Chat supports understanding images, calling functions / tools, strict JSON output, fine-tuning on your own data. It streams replies by default.
GPT-5.3 Chat was released in March 2026, with training data cut off around July 2025.
Models in a similar class include GPT-5.2, GPT-5.2 Chat, GPT-5.2-Codex. The "Similar models" section below this FAQ links into each.

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