OpenAI

GPT-4.5

Public pricingMedium memoryVisionTool use

GPT-4.5 is OpenAI's medium-memory model with vision, tool use. This page shows current pricing, an interactive cost calculator, and a side-by-side with similar models.

Input

$75.00/1M tokens

Output

$150.00/1M tokens

Cached

$37.50/1M tokens

Batch

$37.50/1M tokens

Interactive

Calculate your GPT-4.5 bill.

Adjust the workload below and watch the monthly cost update in real time.

What would GPT-4.5 cost you?

Adjust the workload to see your monthly bill.

1,00010,00050,000250,0001M10M

Technical specifications

GPT-4.5 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

—

Training cutoff

—

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-4.5

  • Screenshot analysis, image understanding, or document OCR.
  • Agentic workflows that call tools or APIs.
  • 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-4.5 — 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-4.5 costs roughly $11,625 per month. Input is $75.00 /1M tokens and output is $150.00 /1M tokens.
GPT-4.5 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-4.5 supports understanding images, calling functions / tools, strict JSON output. It streams replies by default.
Models in a similar class include GPT-5, GPT-5.1, Claude Opus 4.7. The "Similar models" section below this FAQ links into each.

Still unsure?

Compare GPT-4.5 against 100+ other models.

Open the full wizard — pick a use case, set your usage, and see side-by-side monthly costs in under a minute.

Open the comparison wizardBook a call