Model Comparison
GPT-5 vs o1Which is better in 2026?
GPT-5 significantly outperforms across most benchmarks. GPT-5 is 7.6x cheaper per token.
Verdict: GPT-5 vs o1 — which is better?
GPT-5 (by OpenAI) and o1 (by OpenAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.
GPT-5 outperforms in 6 benchmarks (FrontierMath, GPQA, HumanEval, MMLU, MMMU, SWE-Bench Verified), while o1 is better at 1 benchmark (MATH). GPT-5 significantly outperforms across most benchmarks.
On price, GPT-5 is roughly 7.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5 also accepts a larger context window (400,000 input tokens), making it the stronger choice for long documents and large codebases.
Choose GPT-5 if…
- you want the strongest raw capability — it leads on 6 of 7 shared benchmarks
- cost matters — it's about 7.6x cheaper per token
- you process long inputs — it offers a 400,000 token context window
- you want the most recent training data — it shipped Aug 2025
Choose o1 if…
- you want predictable pricing at $15.00/M input and $60.00/M output
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5 outperforms in 6 benchmarks (FrontierMath, GPQA, HumanEval, MMLU, MMMU, SWE-Bench Verified), while o1 is better at 1 benchmark (MATH).
GPT-5 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-5 ($1.25/1M tokens) is 12.0x cheaper than o1 ($15.00/1M tokens).
For output processing, GPT-5 ($10.00/1M tokens) is 6.0x cheaper than o1 ($60.00/1M tokens).
In conclusion, o1 is more expensive than GPT-5.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5 accepts 400,000 input tokens compared to o1's 200,000 tokens. GPT-5 can generate longer responses up to 128,000 tokens, while o1 is limited to 100,000 tokens.
Input Capabilities
Supported data types and modalities
GPT-5 supports multimodal inputs, whereas o1 does not.
GPT-5 can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-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-5 was released on 2025-08-07, while o1 was released on 2024-12-17.
GPT-5 is 8 months newer than o1.
Aug 7, 2025
11 months ago
7mo newerDec 17, 2024
1.6 years ago
Knowledge Cutoff
When training data ends
GPT-5 has a documented knowledge cutoff of 2024-09-30, while o1's cutoff date is not specified.
We can confirm GPT-5's training data extends to 2024-09-30, but cannot make a direct comparison without o1's cutoff date.
Sep 2024
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Provider Availability
GPT-5 is available from OpenAI. o1 is available from Azure, OpenAI.
GPT-5
o1
Outputs Comparison
Key Takeaways
GPT-5
View detailsOpenAI
o1
View detailsOpenAI
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against GPT-5 and o1 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5 vs o1.