GPT-4.5 vs GPT-4o
GPT-4.5 leads the LLM Stats Score 19.4 to 11.0. GPT-4o is 21.4x cheaper per token.
OpenAI · OpenAI · Updated for 2026
Which is better?
GPT-4.5 leads the overall LLM Stats Score 19.4 to 11.0, ranking #243 overall.
In the 4 individual benchmarks reported for both models, GPT-4.5 wins 3; this is a narrower head-to-head signal than the composite indexes.
On price, GPT-4o is roughly 21.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-4.5
- overall performance matters — it scores 19.4 and ranks #243 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you value its reported benchmark strengths — it wins 3 of 4 exact shared results
- you want the most recent training data — it shipped Feb 2025
Choose GPT-4o
- cost matters — it's about 21.4x cheaper per token
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
26 reported for GPT-4.5 · 8 for GPT-4o
GPT-4.5 outperforms in 3 benchmarks (GPQA, MathVista, MMLU), while GPT-4o is better at 1 benchmark (HumanEval).
GPT-4.5 shows notably better performance in the majority of benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-4.5 ($75.00/1M tokens) is 30.0x more expensive than GPT-4o ($2.50/1M tokens).
For output processing, GPT-4.5 ($150.00/1M tokens) is 15.0x more expensive than GPT-4o ($10.00/1M tokens).
In conclusion, GPT-4.5 is more expensive than GPT-4o.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 128,000 tokens. Both models can generate responses up to 4,096 tokens.
Input capabilities
Documented input modalities across available providers
Both GPT-4.5 and GPT-4o support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-4.5
GPT-4o
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-4.5 was released on 2025-02-27, while GPT-4o was released on 2024-05-13.
GPT-4.5 is 10 months newer than GPT-4o.
Feb 27, 2025
1.7 years ago
9mo newerMay 13, 2024
2.5 years ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
GPT-4.5 is available from OpenAI. GPT-4o is available from Azure, OpenAI.
GPT-4.5
GPT-4o
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-4.5 and GPT-4o side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-4.5 vs GPT-4o.