OpenAI

GPT-4.5 — Benchmark Scores, Pricing & Performance Analysis

FLAGSHIPOpenAI
Chatbot Arena ELO
1310
Output Speed
60 tok/s
Input Cost
$75.0/1M
Output Cost
$150.0/1M
Context Window
128K

GPT-4.5 by OpenAI demonstrates strong general intelligence. View detailed benchmark data including scores across coding, math, reasoning, speed, and cost metrics.

General Benchmarks

Chatbot Arena ELO
131043rd of 74

Human preference ELO from blind head-to-head votes

LMSYS / HuggingFace
MMLU-Pro
78.0%29th of 66

Massive Multitask Language Understanding professional benchmark

HuggingFace Leaderboard
IFEval
86.0%20th of 25

Strict instruction following accuracy on verifiable constraints

Google Research
SimpleQA
62.5%1st of 14

Factual accuracy on short, verifiable questions

OpenAI

Coding Benchmarks

LiveCodeBench
45.0%39th of 66

Live competitive programming benchmark

livecodebench.github.io
HumanEval+
88.0%20th of 66

Code generation correctness with extended tests

Papers
SWE-bench Verified
38.0%41st of 67

Real-world software engineering task resolution

swebench.com

Math Benchmarks

GSM8K
94.0%27th of 66

Grade school math word problems

Papers
MATH
82.0%32nd of 66

Competition mathematics problem solving

Papers

Reasoning Benchmarks

ARC-AGI
20.0%41st of 66

Abstraction and Reasoning Corpus for general intelligence

arcprize.org
GPQA Diamond
71.4%86th of 140

Graduate-level science Q&A by domain experts

Papers

Speed Benchmarks

Time to First Token
600 ms67th of 92

Latency before first token arrives

Aggregated
Output Speed
60 tok/s65th of 94

Tokens generated per second

Aggregated

Cost Benchmarks

Input Cost
$75.0412th of 413

Cost per 1M input tokens

OpenRouter API
Output Cost
$150.0409th of 413

Cost per 1M output tokens

OpenRouter API

Context Benchmarks

Context Length
128K267th of 451

Maximum context window size

OpenRouter API

GPT-4.5 — Benchmark Scores Overview

Scores normalized to percentage scale for visual comparison. ELO scores mapped to 0-100 range (1100-1500).

GPT-4.5 — Frequently Asked Questions

How intelligent is GPT-4.5?

GPT-4.5 scores 1310 on the Chatbot Arena ELO rating, making it a mid-tier AI model. This score is based on blind head-to-head human preference voting.

How much does GPT-4.5 cost?

GPT-4.5 costs $75.0 per 1M input tokens and $150.0 per 1M output tokens. This places it in the premium pricing tier.

How fast is GPT-4.5?

GPT-4.5 generates output at 60 tokens per second, which is slower, prioritizing quality over speed compared to other models. The time to first token is 600 ms.

How good is GPT-4.5 at coding?

GPT-4.5 achieves 38.0% on SWE-bench Verified, demonstrating moderate real-world software engineering capability. This benchmark tests the model's ability to resolve actual GitHub issues.

How good is GPT-4.5 at math and reasoning?

GPT-4.5 scores 82.0% on the MATH benchmark (competition-level mathematics). It also achieves 71.4% on GPQA Diamond, a graduate-level science reasoning benchmark.

What is the context window of GPT-4.5?

GPT-4.5 has a context window of 128K tokens. This determines how much text, conversation history, and code the model can process in a single request.

Who created GPT-4.5?

GPT-4.5 was created by OpenAI. It is classified as a flagship model in our catalogue.

Is GPT-4.5 open source?

No, GPT-4.5 is a proprietary model. It is available through OpenAI's API and compatible providers.