GPT-4.5 vs o1
GPT-4.5 and o1 are closely matched at 20.2 and 20.9 on the LLM Stats Score. o1 is 3.6x cheaper per token.
OpenAI · OpenAI · Updated for 2026
Which is better?
GPT-4.5 and o1 are closely matched on the overall LLM Stats Score at 20.2 and 20.9.
In the 12 individual benchmarks reported for both models, o1 wins 10; this is a narrower head-to-head signal than the composite indexes.
On price, o1 is roughly 3.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
o1 also accepts a larger context window (200,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-4.5
- you want the most recent training data — it shipped Feb 2025
Choose o1
- you value its reported benchmark strengths — it wins 10 of 12 exact shared results
- cost matters — it's about 3.6x cheaper per token
- you process long inputs — it offers a 200,000 token context window
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 · 19 for o1
GPT-4.5 outperforms in 2 benchmarks (MathVista, SimpleQA), while o1 is better at 9 benchmarks (AIME 2024, GPQA, GSM8k, HumanEval, MMLU, MMMLU, MMMU, SWE-Bench Verified, TAU-bench Retail).
o1 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 5.0x more expensive than o1 ($15.00/1M tokens).
For output processing, GPT-4.5 ($150.00/1M tokens) is 2.5x more expensive than o1 ($60.00/1M tokens).
In conclusion, GPT-4.5 is more expensive than o1.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
o1 accepts 200,000 input tokens compared to GPT-4.5's 128,000 tokens. o1 can generate longer responses up to 100,000 tokens, while GPT-4.5 is limited to 4,096 tokens.
Input capabilities
Documented input modalities across available providers
GPT-4.5 supports multimodal inputs, whereas o1 does not.
GPT-4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-4.5
o1
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 o1 was released on 2024-12-17.
GPT-4.5 is 2 months newer than o1.
Feb 27, 2025
1.6 years ago
2mo newerDec 17, 2024
1.8 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. o1 is available from Azure, OpenAI.
GPT-4.5
o1
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-4.5 and o1 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-4.5 vs o1.